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How to control the sweet corn pests and diseases timely?
From the time of sowing to the 6th leaf stage, underground pests such as ground tigers and earthworms, and leafy insect pests such as cabbage caterpillars and diamondback moths are infested. Insect seedlings caused by underground pests cause seedling deficiency, which has a great impact on the yield and should be prevented. From the 7th leaf stage to the tasselling stage, the main pest is corn borer. Once the larvae enter the culm and the ear damage, it will cause a large loss of yield. When a number of wormholes with a diameter of about 1 mm appeared in the heart and leaves of individual plants, all fields should be treated immediately. This time is also the best time to prevent sheath blight and large and small leaf spot. Loose powder to the harvest period, mainly Spodoptera litura, armyworm and aphids pests and other damage. Spodoptera litura and Mythimna separata larvae began to damage the tip of the ear after silking, that is, the spit of filaments, seriously affecting the appearance of the product. In the event of frequent rainy days, Spodoptera litura increases its risk and should be prevented and treated immediately after the loose powder is finished. The locust can be controlled before its spread.
