Diseases of watermelon mainly include damping-off, blight, blight, powdery mildew and anthrax. If you suffer from damping-off and blight, you can use carbendazim and Greenhenge to disinfect seedbeds; if you suffer from wilt, you can use 15% of watermelon broth No. 1 300 to 350 times Irrigation roots, each 0.5 kg. After the watermelon colonization, there are 3 to 4 true leaves used for medicine, and the control effect is better. In the case of powdery mildew and anthrax, sprays such as chlorothalonil, thiophanate-methyl, and powdered rust may be used. Alternating sprays are effective.
Insect pests of watermelon mainly include blind stink bugs, aphids, ladybugs, root cicadas, and red spiders, etc. Medicaments can be used for dichlorvos, enemies, etc. Roots can be used to flush roots with trichlorfon, which can be installed with insecticidal lamps and yellow plates.
Root knot nematodes are now very serious. Root-knot nematodes mainly damage watermelon plants at the seedling stage. Therefore, it is necessary to choose a plot with no root knot nematode. If root knot nematodes are found after colonization of watermelon seedlings, avermectin agents such as 1% aphid 2000 times solution and 1.8% apadine 3000 times solution can be used for root irritation. In field preparation, Daejeon can use pesticides such as phoxim, diazinon, and chlorpyrifos.
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