First, the control of large spot can be used 70% thiophanate-methyl or 50% carbendazim or 70% mancozeb WP, 50-100 grams per acre, watered 30 kg spray, every 7-10 days anti-time , Total 2-3 times. Prevention of downy mildew can be used 25% metalaxyl, 90% epimedium cream, 50% metalaxyl manganese zinc, 90% metal frost copper wettable powder 600 times or 64% antitoxic powder wettable powder 400 times liquid soaking 24 Hours, cool dry sowing, control effectiveness in more than 70%.
2. The insect pests of waxy corn are mainly the underground pests at the seedling stage and the corn borer at the ear stage. The following measures can be taken:
1. When planting seeds with phoxim or 2000-3000 times dimethoate solution, it can control underground pests such as earthworms, earthworms and ground tigers.
2, for the purpose of picking fresh corn for the production of waxy corn fields, the best way to prevent and treat corn borer is biological control method, that is, in the big bell mouth period inoculation of Trichogramma eggs to control the occurrence of corn borer. If it is necessary to use chemical pesticides to control corn borer, low-level pesticides should be used to prevent and treat it in the small bell-mouth period. The dosage should be as small as possible, so that it can be used with caution, less use, and early use of pesticides. It is scientific and effective to control underground pests. Do not leave pesticide residues on milk spikes to produce pollution-free waxy corn products.
3. For waxy corn with harvested grains, corn borer can be prevented and treated during the big bell mouth period, and 1 kg of carbofuran granules per acre can be used.
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