Method for controlling pesticides against armyworms
Sticky insects, commonly known as the five-color insects and marching insects, are large pests that are migratory and prone to disasters. The worm occurs in Henan Province for three to four generations a year, mainly affecting crops such as wheat , corn, and millet. The overwintering adult migrating from the south to the city's moths is generally from mid-March to mid-April. The first generation of larvae harmed wheat from April to May; the first generation of adults mostly moved north, but with the planting structure The adjustment of the multiple cropping index and the change of climatic conditions, the number of adults staying in the first generation increased year by year, and the damage to millet and corn seedlings increased. The second generation of adults migrated from North China and southeastern China in early July to August. The larvae of the three generations of armyworms from late July to the beginning of September endangered the autumn crops such as millet and corn in the city; the third generation of adults migrated to the south, leaving a small amount of weeds.
Occurrence characteristics: larvae lurk in the corn roots around the day, do not drink or drink under the wheat stubble or clods, and climb to the plants in the evening or cloudy. Plowing and no wheat stubble occurred lightly, and the plots with deeper wheat stubble and more wheat stubble occurred more seriously.
Control method:
1. Prevention time: Before 8 o'clock in the morning, after 6 o'clock in the afternoon, the control effect of the armyworm coming out for feeding is good.
2, the use of pesticides : per acre with 50% phoxim emulsifiable concentrate, 40% chlorpyrifos EC 1000 times liquid or 4.5% beta-cypermethrin, 2.5% deltamethrin emulsifiable concentrate 1500 times evenly sprayed. Because of the remaining wheat straw, wheat Many, it is required to increase the amount of liquid when spraying, in order to improve the control effect.
3. Precautions: It is strictly forbidden to use highly toxic and highly toxic pesticides to ensure the safety of humans and animals.
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