Edema, swelling, sun blight in tomatoes: symptoms, control

Tomatoes face many environmentally related problems such as edema, bloating, and sun blight. In this article on your website, World of Plants, we will review the causes and methods of prevention.

Symptoms of edema, swelling, and sunburn in tomatoes

Edema – This disorder is characterized by green calcification-like growths on the upper and lower surfaces of the leaf. Growth may explode as it grows older.

• (edema, swelling, sunburn)
• Causative factor: environmental
• Distribution: All over the world

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.

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.

Sunscald A white, shiny skin area forms on the side of a fruit that is suddenly exposed to direct sunlight. The affected area becomes sunken and black mold frequently develops on the affected tissue. Sunscald usually develops when the green fruit is ripe.

Conditions for the development of edema, swelling, and sun blight in tomatoes

Edema – This disorder develops when leaf tissue becomes waterlogged, as a result of root pressure continuing to move water up the plant when transpiration is poor. 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 of edema, swelling, and sun blight in tomatoes

• 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 the temperature and moisture of greenhouse soil fertility can help reduce the occurrence of this disturbance.
• 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.

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the reviewer :

Tomato leaf edema – decorexpro