Post-Hong Kong Disease and Pest Control
First, the floods easily lead to popular diseases and insect pests
1. Diseases and pests of food crops: After the heavy rain, the humidity in the field is large, which is beneficial to the occurrence of rice bacterial diseases, sheath blight, leaf blast, corn sheath blight, and size spot disease. It is conducive to the migration, reproduction, and damage of migratory pests (such as rice planthoppers and rice leaffolders).
2. Vegetable pests: leafy mildew, disease, blight, wilt, root rot, etc. of leafy vegetables, Solanaceae, and melons are prone to occur; yellow song strips, noctuids, etc. will be in the leaves. Diseases such as vegetables, solanaceae, melons, taro, and sweet potatoes have occurred.
3. Pests and diseases of fruit trees: Pests, scabs, anthrax, spider mites and other pests will occur.
Second, prevention and control opinions:
1. Agricultural control
After the flood water recedes, the standing crops are straightened, the crop leaves are cleaned, the drainage is done, the cultivator loosens the soil, improves the permeability of the roots of the flooded crops, restores the root activity of the flooded crops, and promptly clears the diseased orchard of the orchard. Take out of the orchard and gardens to prevent secondary infections. If the disaster is heavy, it must be replanted or replanted to minimize losses. Due to serious loss of soil fertility after flooding, timely fertilization, application of phosphorus and potassium fertilizers, increase of organic fertilizer, appropriate application of various foliar fertilizers and trace elements (sputtering of potassium dihydrogen phosphate, Chinese king of fertilizer) to increase crop plants The resistance to disease.
2. Chemical control
In the early stage of disease or the low stage of pests, high-potency, low-toxic and low-residual counterpart pesticides can be used for prevention and control. Control of rice blast can be used azoxystrobin, prochloraz, kasugamycin, tricyclazole, etc., can be used for the control of sheath blight tebuconazole, Jinggangmycin, etc., prevention of rice planthopper can be used nitenpyram, fenthrin, pyridazole Anthrone, buprofezin, etc., can be used to control rice leaf roller, profenofos, chlorantraniliprole (Kang wide), chlorpyrifos, avermectin, etc., control phytocide, avermectin, etc. For the prevention and treatment of fungal diseases on vegetables and fruit trees, thiophanate-methyl, carbendazim and chlorothalonil can be used. For bacterial diseases, streptomycin for agriculture and kasugamycin can be used. Coriander, fenpropathrin, avermectin, etc., citrus disease can be treated with mancozeb, antiviral, and prochloraz.
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