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This month, the temperature in Lin’an City has gradually dropped, but it's often accompanied by humid thunderstorms. Typhoons frequently hit during this period, bringing heavy rainfall and increasing the risk of pests and diseases. As a result, effective pest management is crucial for vegetable crops.
**Cruciferous Vegetable Pest Control**
The onset of cruciferous clubroot disease has been observed, along with downy mildew, soft rot, anthracnose, leaf spot, black spot, and viral diseases. The fourth generation of beet armyworms, Spodoptera litura, and cabbage cutworms are also active. The population of Plutella xylostella and Pieris rapae has increased, making pest control more challenging. It’s essential to monitor and manage these pests early, especially during their larval stages, to prevent serious damage.
**Legume Vegetable Pest Control**
September marks the peak season for Liriomyza sativae infestations. Special attention should be given to crops like autumn beans, late cowpeas, and lentils. Late cowpeas require continued monitoring for pod borer infestations. During peak periods, pyrethroid insecticides are recommended for application in the morning. At the same time, keep an eye on rust, powdery mildew, and viral diseases that can affect legumes.
**Melon Vegetable Pest Control**
The main pests affecting melons this month include melon thrips and Liriomyza sativae. During the egg hatching stage, apply insecticide at a 500-fold dilution. For 1–3 instar stages, fipronil is effective. To control Liriomyza sativae, ciprofloxacin and other insecticidal agents can be used. Additionally, continue managing diseases such as anthracnose, powdery mildew, bacterial leaf spot, and bacterial blight, as well as pests like aphids, thrips, and red spider mites.
**Solanaceous Vegetable Pest Control**
Continue monitoring for pests such as eggplant tea webworm, spider mites, aphids, twenty-eight-spotted ladybugs, brown spot disease, pepper anthracnose, powdery mildew, and viral diseases. For tomatoes, pay special attention to cotton bollworms and Liriomyza sativae infestations.
**General Vegetable Pest Control**
Make sure to monitor and manage corn smut, large and small leaf spots, rust, and corn borers. These pests can significantly impact yield if left unchecked.
**Pre-Winter Cultivation**
Take advantage of the good weather to prepare seedling beds by turning the soil and ensuring proper nutrient content. In some areas, solanaceous vegetables are entering the transplanting phase, so it's important to implement disease prevention measures early to protect young plants from infections.