(edema, swelling, sunburn)
*Causative factor: environmental
Distribution: All over the world
Symptoms: Edema – This disorder is characterized by a green calcification-like growth on the upper and lower surfaces of the leaf. Growth may explode as it grows older.
Edema on tomatoes may appear due to a sharp change in weather: warm, sunny and sharp cold, cloudy and humid. In hot weather, seedlings are well watered and with a sharp change in weather conditions, they simply do not have time to properly process moisture.
(edema ulcers on the lower surface of the leaf)
Swelling Affected fruits have an angular appearance and are less dense than normal fruits. When the fruit is cut open, growth appears
Incomplete locus with very few seeds and little cosmos.
(Swelling: patchy site and gelatinous growth.)
Sunscald: A white, shiny skin area forms on the side of the fruit that is suddenly exposed to sunlight
Direct sun. The affected area becomes sunken and black mold frequently develops on the affected tissue. Sunscald usually develops when the green fruit is ripe.
(sunburn, cured tomatoes)
Conditions for the development of the disease
Edema – This disorder develops when leaf tissue becomes waterlogged, as a result of continued root pressure transporting water to
Top the plant when transpiration is weak. This usually occurs when the soil is warm and moist and the air temperature is cool. Long periods of high humidity help cause this disorder.
Bloating – Factors that lead to poor gel formation and seed set are extremes of temperature, both high and low, use of fruit hormones, drought conditions or excessive water use. Excessive soil fertility, especially nitrogen, may exacerbate the development of this disorder.
Sunblight – Fruits that are suddenly exposed to direct sunlight due to premature loss of foliage resulting from disease, pruning or breakage on fruiting plants with increased load, are most susceptible to this disorder. Sun blight occurs when the internal temperature of fruits rises too high, leading to tissue damage.
- treatment
Edema – Proper aeration of greenhouse crops and maintaining soil moisture levels can help
- If edema of tomato seedlings is observed, you need to immediately dry the plant (loosen the earthy clod, arrange the cups with seedlings more freely even if it is less illuminated), remove from the UV lamp, create additional ventilation so that the air also dries. Damaged leaves do not need to be torn off, the plant will decide for itself whether to leave them or not.
- If possible, plant tomatoes for permanent residence. In this case, the trunk should be deepened above the affected areas. New roots will run out of it very quickly.
- When edema strikes seedlings in cold weather, and there is no way to transplant them for permanent residence, it is worth resorting to radical measures. It is necessary to separate the apex, which remains healthy, from the affected area and the root. It will quickly sprout new roots even in plain water.
- A good helper, both in the prevention of edema and in treatment, is an ordinary household fan. If seedlings are grown on shelves, you need to install a fan on each shelf, if only on the windowsill, then direct the air stream parallel to the window sill. You can also install two fans in the greenhouse near the tomatoes.
Swelling – Controlling temperature and moisture in greenhouse soil fertility can help reduce
This disorder occurs.
Sunscald – Using foliar varieties that are resistant to wilt and disease as well as pesticide spray programs can help
Fungi are good at reducing losses caused by sunburn. Also, losses can be reduced by careful pruning and harvesting, to reduce leaf fall and exposure of fruits to direct sunlight.
the reviewer :
https://land.decorexpro.com/ar/pomidory/oedema-listev-tomatov.html
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