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Pests and diseases are not spared stalked celery by the side. In this article I will tell you how to cope with them and preserve the high quality of the harvest.
Celery (borsch) fly takes off at the end of May, often flies over from a hogweed. Lays eggs under the skin of the leaves, they appear small lumpy spots. The formed larvae eat away tissue, leaving long brown passages. Petioles become bitter, yield decreases. In the middle lane gives one generation, in the south - two, winters in the soil.
Ways to fight: observe crop rotation, preliminate lime to acidic soil, timely thin out the seedlings, destroy the hogweed and weeds of the family of the same name, dig up the bed deep in the fall.
Carrot fly winters in the soil. Flies out in the spring, laying small white eggs under the plant during the formation of the first true leaf. The larvae damage the roots and other parts of the celery. Carrot fly in the middle lane gives two generations: in June - July and in August - September.
Ways to fight: timely carry out weeding, feeding and loosening the soil. In early June and early August, sprinkle the soil between the rows with a mixture of equal parts of tobacco dust and sand or dry mustard (1 tbsp / m2) with an interval of 7 to 8 days.
Carrot listobloshka poses a danger to the northwest region. The pest winters on conifers, eats in spring and early summer on pine needles. Then flies over to the celery and sucks the juice from the leaves. They are deformed, scapes are shortened, plants look depressed.
Ways to fight: the same as against carrot flies.
Bean aphid the largest of all types of aphids. Each generation develops in just two weeks.
Ways to fight: At the first signs of the appearance of a pest, sprinkle celery with broths or infusions from tops of tomatoes, potatoes, dandelion, yarrow, a good result is given by water infusion of orange, mandarin or lemon peels (1:10), which is kept for 3-5 days.
Cercosporosis, or early burn, more often manifested in wet cold weather with sudden temperature changes. Leaves form numerous round spots of 5 mm each with a light center and a red-brown border, visible on both sides of the leaf. On the petioles appear oblong spots. With increased humidity, the spots become covered with violet bloom. Diseased leaves and petioles dry up. The pathogen is stored in the soil and plant residues.
Prevention and treatment: disinfect the seeds at a temperature of 48 degrees for 30 minutes, observe crop rotation, destroy weeds and plant debris, and spray the plants with 0.1% Fundazole or Topsin-M with strong distribution. Last treatment 20 days before harvest.
Septoria, or late burn, strikes at the end of the summer. Small, numerous yellow spots appear on the leaves; they are oblong, depressed, brown-brown on the petioles. The causative agent of the disease is stored on plant debris, in seeds and soil for up to three years. The disease spreads in cold rainy weather.
Prevention and treatment: the same as with chalcosporosis.
Mealy dew affects all aboveground parts of the plant, covering with white or grayish cobwebby patina. Then it turns into felt with black dots, moving from the upper side of the sheet to the lower. The disease progresses strongly with sharp fluctuations in air temperature and humidity. Cold dews contribute to the spread. The pathogen overwinters on plant debris and weeds.
Prevention and treatment: dig deeply the soil, destroy diseased plant debris and weeds, observe the alternation of plants, with a strong spread of infection, spray plants with infusion of field sow (300 g per 5 l of water, leave for 8 hours).
Cucumber Mosaic manifests itself depending on the virus strains and weather conditions. In one case, it is a yellow mosaic and slow growth, in the second - large rings on the tops of the plants, causing their deformation, in the third - small ringlets. The causative agent of the disease is preserved on wild plants, from which it is carried by aphids.
Prevention and treatment: in areas where mosaic spreads, it is necessary to sow or plant seedlings early, timely remove weeds, spray plants against aphids with a decoction of tomato tops (2 kg of dry tops for 10 liters of water, boil for 30 minutes over low heat, strain after settling and dilute 2-3 liters) decoction in 10 liters of water).
Rust amazes in early summer. Red-brown pads appear on the underside of the leaf and petioles, which eventually turn into light brown powdered spots, and by the fall form a dark-brown sporulation often merging into one line. Sick plants turn yellow and dry up, stalks lose commercial quality.
Prevention and treatment: to sow or plant seedlings at the optimum time, spray plants with biological means of protection: Fitosporin-M, Baktofit.
Boron deficiency causes the death of the growing point in the center of the rosette together with the adjacent leaves. The base of the petioles cracks longitudinally. In the upper part of the roots cracks are formed, which gradually expand and are populated by secondary microorganisms. The disease often affects plants on light sandy soils and in dry years.
Prevention and treatment: follow the rules of agricultural engineering, water plants in a timely manner, spray the borax in a concentration of 0.04% throughout the season.
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The summer period of this pest usually falls on the last decade of May and most often it moves to celery from the bush of the hogweed.
Then, the female flies make egg-layings in the folds of the leaves of the plants, due to which small lumpy specks form on them. The larvae hatching from them devour the leaves from the inside, leaving large tunnels in them.
As a result, celery leaves and petioles acquire a bitter taste, and roots grow small and inconspicuous.
In the middle zone of Russia, one generation of the borsch fly flies out for the season, and in the more southern regions - as many as two. Pest spends winter in the ground.
Methods for the prevention and control of this insect include:
- strict observance of culture at the site,
- regular liming of soil (especially if it tends to sour),
- free planting in the garden,
- systematic destruction of seedlings of hogweed and other weeds of the same family,
- deep autumn soil digging,
- growing celery in joint plantings with onions (its smell perfectly repels borsch flies).
It also goes to the topsoil for wintering. A fly wakes up in the spring when the weather is stable and warm. At the same time, she lays tiny whitish eggs next to young plants of the umbrella family (carrot, celery, etc.).
The pest larvae actively feed on the roots and leaves of celery, from which it may even die.
During the season the carrot fly brings two generations: in June - July, and also in August - September.
Precautionary measures against flies include weed control, timely balanced feeding and frequent soil loosening between the rows. In the first week of June and early August, it is also recommended to powder the soil around the plants twice or three times with a mixture of tobacco ash and sand in an equal ratio.
For better effect, sand can be replaced with mustard powder. The treatments are carried out with a break of 7-8 days, while approximately one tablespoon of such a mixture is spent per running meter of the bed.
Especially often this pest is found in the north-western region of our country. He spends winter on coniferous trees, and in spring and early summer he continues to feed on pine needles. After that, the leaflet switches to celery and begins to suck the juice out of its leaflets. As a result, they are deformed, and the plants become depressed.
] The leaflet can be fought by the same methods as the carrot fly.
Bean aphids are the largest species of aphids, which also pose a serious threat to celery planting. This pest takes only a couple of weeks to develop one generation, therefore timeliness is important in the war with him.
As soon as you notice even a small amount of aphids on celery, you should immediately begin to take action. Sprinkle the plants with infusion or decoction of tomato or potato tops, dandelion or yarrow. Alternate the processing of herbal infusions with spraying infusion on the peels of any citrus. The latter is prepared as follows: the peel of an orange, mandarin or lemon is poured with ten parts of water, infused for 3-5 days and filtered.
To prevent the aphid females from laying eggs, sit around the celery with more nasturtium and savory. By the way, savory leaves can then be sodden and enjoy the most delicious healing tea all winter long.
Celery can also suffer from many infectious and non-communicable diseases. How to protect plants from all misfortune, you can read in this article.
Celery (borsch) fly
Flies out at the end of May, often flies from the hogweed. Lays eggs under the skin of the leaves, they appear small lumpy spots. The formed larvae eat away tissue, leaving long brown passages. Petioles become bitter, yield decreases. In the middle lane gives one generation, in the south - two, winters in the soil.
Ways to fight. Observe crop rotation, preliminate lime sour soil, timely thin out seedlings, destroy hogweed and weeds of the family of the same name, deeply dig a bed in the fall.
Cercosporosis, or early burn
It is often manifested in wet cold weather with sudden temperature changes. Leaves form numerous round spots of 5 mm each with a light center and a red-brown border, visible on both sides of the leaf. On the petioles appear oblong spots. With increased humidity, the spots become covered with violet bloom. Diseased leaves and petioles dry up. The pathogen is stored in the soil and plant residues.
Prevention and treatment. Disinfect seeds at a temperature of 48 degrees for 30 minutes, observe crop rotation, destroy weeds and plant debris. With a strong spread, spray the plants with 0.1% foundation or Topsin-M, the application rate of the solution is 1 l per 10 m2. Last treatment 20 days before harvest.
Septoria, or late burn
Impresses at the end of the summer. Small, numerous yellow spots appear on the leaves; they are oblong, depressed, brown-brown on the petioles. The causative agent of the disease is stored on plant debris, in seeds and soil for up to three years. The disease spreads in cold rainy weather.
Prevention and treatment. The same as with chalcosporosis.
By the way
Reproduction of aphids is impeded by nasturtium or savory sown near celery.
It affects all aboveground parts of the plant, covering it with white or grayish cobwebby patina. Then it turns into felt with black dots, passing from the upper side of the sheet to the lower. The disease progresses strongly with sharp fluctuations in air temperature and humidity. Cold dews contribute to the spread. The pathogen overwinters on plant debris and weeds.
Prevention and treatment. Dig deeply the soil, destroy diseased plant debris and weeds, observe the alternation of plants. With a strong spread of infection, spray the plants with infusion of field osoma (300 g per 5 l of water, leave for 8 hours).
Manifested depending on the virus strains and weather conditions. In one case, it is a yellow mosaic and slow growth, in the second - large rings on the tops of the plants, causing their deformation, in the third - small ringlets. The causative agent of the disease is preserved on wild plants, from which it is carried by aphids.
Prevention and treatment. In areas of mosaic distribution, it is necessary to sow or plant seedlings early, timely remove weeds, spray plants against aphids with a decoction of tomato tops (2 kg of dry leaves to 10 liters of water, boil for 30 minutes over low heat, strain after settling and dilute 2-3 liters of broth in 10 liters of water).
Impresses in the early summer. Red-brown pads appear on the underside of the leaf and petioles, which eventually turn into light brown powdered spots, and by the fall form a dark-brown sporulation often merging into one line. Sick plants turn yellow and dry up, stalks lose commercial quality.
Prevention and treatment. Sowing or planting seedlings at the optimum time, spray plants with biological means of protection: phytosporin-M (4-5 ml / l of water), baktofit (7 g / l of water). This amount is enough for processing 10 m2.
Causes death of the growing points in the center of the rosette together with the adjacent leaves. The base of the petioles cracks longitudinally. In the upper part of the roots cracks are formed, which gradually expand and are populated by secondary microorganisms. The disease often affects plants on light sandy soils and in dry years.
Prevention and treatment. Follow the rules of agrotechnology, timely water the plants, carry out spraying of brown in a concentration of 0.04% throughout the season.
How can celery get sick?Celery (Latin name Apium) – plant of the umbrella family. The most common crop is celery fragrant. This root crop grows in Hindustan, in countries of Asia, Africa, America, choosing a place with enough moisture to live. At home, celery (Mediterranean) and today you can find wild forms of this plant.
Celery can be affected by these diseases:
- Cercospora Most often infect plants in greenhouses and greenhouses. All aboveground organs are affected. Churcosporosis is born on the seedlings, and then goes to adult plants. Signs: irregular or rounded spots appear on the sheet, which eventually become purple.
- Septoria. It affects the stalks, stems, leaves. Signs: round, chlorotic or yellow-chlorotic spots appear on the celery, which eventually brighten in the center, and a dark border appears. The consequences - the leaves curl and dry, the stalks thin out and become fragile.
- Mealy dew. Can affect celery in both open and protected ground. It affects all aboveground parts of the plant, most of all the leaves. Manifested by white bloom, which later becomes mealy with black patches. With severe infection, powdery mildew affects both sides of the leaf, stems and petioles, celery rots.
- Fomoz. It affects celery already in storage. This mushroom is passed along with the seeds. It affects both aboveground and underground parts of the plant. The first manifestation of fomoz is that the top point of the seedling is affected, and the fungus subsequently moves to the stem. The plant slows growth, the leaves turn yellow, acquiring a bluish or brown color at the base, the petioles break.
How to cure white rot celeryThe source of Sclerotinia sclerotiorum (the so-called white rot) is contaminated soil. White rot appears on the acidic, nitrogen-rich earth in cool, wet weather or during storage.
Distinctive feature – a white patina (mycelium) appears on the celery, on which black sclerotia of the fungus subsequently occurs. Over time, the fabric becomes softer, turns brown, and the root crop rots.
Treatment and Prevention:
- Sour soil needs to lime,
- Before planting seedlings, the ground must be sanitized,
- All plant residues and weeds must be removed from the garden bed before planting.
- Good ventilation of celery storage will reduce the risk of spreading sclerotinia.
What if celery gets sick, rust on the leaves
Celery leaves may appear rusty in early summer. The disease manifests itself with red-brown pads on the underside of leaves and petioles, which eventually develop into light brown spots, and by the autumn form a continuous dark brown sporulation.Affected leaves rust turn yellow and dry, losing taste, and petioles lose their presentation and useful properties (as is known in traditional medicine, celery is used in diseases of the gastrointestinal tract and urolithiasis).
Treatment and prevention:
- Sow (planting) celery at optimum times,
- In order to prevent spray plants with biological means of protection (Fitosporin, Baktofit).
Why celery leaves have white spots, ways to treat a plant for septoria
Late burn (septorioz) affects celery at the end of summer. The disease manifests itself with many small yellow spots on the leaves and brown-brown, oblong, as if indented spots on the petioles. The affected leaves twist and dry, the stalks break.
The causative agent of septoria is preserved on plant residues in the soil and seeds for up to three years. It becomes active in cold and rainy weather.
Treatment and Prevention:
Before planting, disinfect seeds (temperature treatment at 48 ° C for 30 minutes), observe crop rotation, do not leave plant residues and weeds on the beds - they should be destroyed, If you have a strong infection, spray celery with a solution of Fundazole or Topsina-M (no later than 20 days before harvesting).
What to do if celery struck a cucumber mosaicThis type of disease is viral in nature. Depending on what type of cucumber mosaic struck the root crop, large rings or small ringlets appear at the top of the plant, the plant slows down its growth.
Immediately remove infected plants from the garden bed. Since the viral forms of the disease are incurable, for the purpose of prevention it is necessary to fight against the carriers of viruses - aphids and ticks.
How to cure leaflets
Cercosporosis (early burn) can manifest itself in cool, wet weather with sudden changes in temperature.
On the leaves of celery appear multiple round spots (about 5 mm in diameter) with a light middle and brown edges. On the petioles an early burn manifests itself of the same nature as oblong-shaped spots. At increase of humidity of a spot become covered by a raid with a violet shade. In the process of developing the disease leaves and petioles dry up.
To combat cercosporosis, they use the same methods as in septoria.
Caraway Mole (lat Depressaria nervosa is a butterfly with a wingspan of 21–26 mm. Wings with a blurred darkening along the veins. Caterpillar moth caterpillar is dark gray, with orange stripes on the sides and a black head. Caterpillar length up to 20 mm.Caterpillars of the caraway moth (Depressaria nervosa) damage umbellate inflorescences. Photo: Lepi-Photos
Butterfly moth moths winter in shelters, flying out in early spring. In May, females lay eggs. In June, caterpillars hatch. They gnaw moves in the stems, leaves, as well as devour the inflorescences! Having finished feeding, the caterpillars pupate in the passages they have gnawed.
Measures to combat the cumin moth. Destruction of damaged leaves, stems and umbrellas. Timely harvesting of seeds (at the same time destroy the caterpillars and pupae). Weeding beds.
Butterfly with a wingspan of 14-18 mm. The head and the front of the back are light yellow. The front wings are dark brown, the rear wings are gray. The caterpillars of the umbrella moth are brown-red, 10–13 mm long. The body is covered with white bumps from which hairs grow. The head, chest and legs are black.Umbrella moth caterpillar (Depressaria depressana). Photo: xespok.net
Butterfly umbrella moths winter (lat Depressaria depressana). Their flight begins in mid-June. Females lay eggs on the inflorescences and the upper leaves of the testes of carrots, dill, parsnip, and other celery plants.Umbrella moth caterpillars eat flowers, buds and ovaries of umbrella cultures. Photo: BugGuide.Net
Caterpillars of the umbrella moth eat flowers, buds, seeds, gnaw stalks, inflorescences cobwebs. After feeding, the caterpillars pupate immediately in the inflorescences. Butterflies fly out in August.
Measures to combat the umbrella moth. The same, as with a caraway moth.
Downy mildew (perinospora)
Downy mildew (perinospora, lat Peronospora parasitica) - a fungal disease that affects the leaves. Initially, on the top, then on the underside of the leaf appear yellowish, later brown spots with abundant white bloom. The leaves wither and die.
The disease spreads with raindrops when watered. The pathogen is stored on plant debris.
Measures to combat downy mildew. Destruction of plant residues, deep digging soil. Thinning thickened crops. The alternation of cultures.
Black rot pathogens are fungi. Black rot (Alternaria) manifests itself during the growing season and storage.
In young plants, black rot symptoms are expressed as a typical black leg. The affected shoots dry out. In the future, the leaves and scapes, on which are found brown spots.
A dark velvety patina appears on the spots in wet weather. Indented black spots appear on the roots. Later, black dry rot develops on the head or on the side of the root. Carrot roots are infected with black rot in the field, and fall ill in storage.
Sources of black rot - seeds, roots, plant residues.
Measures to combat black rot. The same as against fomoz.
Red rot (rhizoctoniosis) is a fungal moss disease caused by a soil fungus.
Root lead-gray spots with red-violet dots are formed on the root. On the spots a thick bloom of a red-violet mycelium is noticeable. In the affected plants, the leaves turn yellow and dry.
Infection persists in the soil and on infected roots.
Measures to combat red rot. The alternation of cultures. Removal of diseased plants during the growing season. Liming sour soil.
Rust on the leaves - what to do in such a situation
Rust fungi are easily detected on celery through bundles of yellow, brown, red and black spores. The seeds of the fungus are formed under the skin of the leaves, and when it breaks, the infection spreads throughout the growing season.
In order to protect celery from this disease, for planting it is necessary to use only healthy materials, as well as completely destroy plants that have been found to be rust.
How to protect celery from scabMost often, this disease affects celery in cold and wet weather. Manifested by brown spots on the roots of the plant. In the process of development of the disease, the peel cracks and flakes.
To prevent scab infection, you should not re-plant celery in one area - take a break of several years.
In order to get a good harvest of celery, it is necessary to carry out disease prevention.
How to deal with celery fly
Borschevichnaya boravnitsa (celery fly) - an insect of red-brown color 4-6 mm long. Lays under the skin of the leaves whitish oval eggs, of which there are legless light green larvae.
It is possible to detect pest eggs by looking at the leaves to the light - brownish specks are visible. The hatched larvae make passages in the form of brown spots in the leaf pulp. With a strong infection, the plant dries out.
Ways of struggle:
- Strict adherence to crop rotation (sow celery in one place with a break of 3-4 years),
- Complete destruction of weeds and plant residues in the area,
- Thermal and chemical disinfection of seeds before sowing.
What is dangerous carrot listobloshkaExternally, the leafblock is a jumping greenish insect with a body length of 1.7-1 mm. Flea larvae are flat, green-yellow. They overwinter in coniferous trees and in spring move to celery.
Adult insects and larvae suck sap from the leaves, as a result of which the leaves curl, the petioles shorten, the plant is inhibited and the yield is significantly reduced. The peak of the leaflet activity is June-July. Root crops growing in areas near pine forests suffer the most.
Ways to fight with carrot fly
This insect hibernates in the ground, wakes up in spring and lays on the plants white eggs on the first leaves. The larvae which appeared later damage celery stalks.
Signs of defeat:foliage becomes red, wilts in the sun and turns yellow, gnawed out on the roots.
To combat the carrot fly, it is necessary to timely weed, feed and loosen the soil. For prophylaxis, at the beginning of June and the beginning of August, with a 7-day interval, pour a mixture of sand and tobacco dust between the beds. Sand can be replaced with dry mustard.
How to deal with bean aphids on celeryBean aphid (Aphis fabae) is the largest representative of this genus. It develops very quickly - every generation in 14 days.
At the first signs of the appearance of aphids on celery, the plant is sprayed with infusions and decoctions of yarrow, dandelion, potato tops, and tomatoes. You can use a water extract of citrus peels (1 part peels per 10 parts of water), which can withstand 3-5 days.
For the prevention of weeds and plant debris you need to timely remove from the garden and regularly carry out deep digging of the site.
The battle for the harvest involves daily work, including various activities. Hopefully, the information provided in this article will help to protect the stalked celery from diseases and pests.