Exposed tomatoes are prone to rotten fruit during the growing season, which directly affects the yield and benefits.
Blight causes rotten fruit. Blight disease is prone to occur after heavy rain. After the onset, brownish concentric ring patterns appear in near-mature green fruits. They form a bull's-eye pattern, causing the whole fruit to turn dark brown and rot and fall off later. Prevention of M. blight, can be used in the early onset of 50% wettable powder with 150 grams of Senzi, 75 kg of water spray, spraying should be careful.
Soft rot causes rotten fruit. Generally occurring on green fruits, the meat will quickly rot after the onset of the disease, and it will be accompanied by odor, and it will easily fall off. After the disease is dried, it will form a white fruit. When the disease is first seen, use 150 grams of 50% dexamethasone per acre, add 100 kilograms of alfalfa mist, or use 200 kg to 40010 of agricultural chloramphenicol solution per acre to spray 75 kilograms.
Solid rot causes rotten fruit. This disease occurs more often on green fruits, and the fruit epidermis often has brownish or dark brown round lesions. It is slightly sunken, and the diseased parts are hard to touch by hand, and do not soften and rot. The diseased fruit does not fall off. Apply 50% thiophantine 150g per acre, add water and spray 75kg to control.
Anthracnose causes rotten fruit. Mainly occurred in mature fruits, the diseased fruit surface often black concentric ring stain spots, a little sunken, lesions secrete a pale red sticky material, and finally the entire disease fruit rotten off. Control methods: mainly to do a good job of prevention, first, seed disinfection; Second, the implementation of the rotation; the third is after planting 2 to 3 weeks, spraying once every 10 to 12 days doxorane 400 to 500 times, or 1: 1:150-fold Bordeaux mixture, applied interactively.
Umbilical rot causes rotten fruit. This is a physiological disease, mainly due to the early supply of sufficient water, resulting in lack of late water. Therefore, when watering, it is necessary to use small water for pouring, and in the morning and evening, avoid flooding. During the result period, foliar fertilizer was sprayed with 0.1% calcium superphosphate solution or 0.2% calcium chloride solution. From the flowering stage, spraying was performed every 15 days for a total of 2 to 3 sprays.
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