Guard against corn stickworms
Maize armyworm is one of the main pests of summer corn in Fuping County. The pest is a migratory pest, and its damage is accidental and destructive. In late May, the plant protection station conducted surveys in 200 samples of 40 wheat fields in 6 towns (districts) including Nanshe, Zhuangli, Zhangqiao and Liuqu. There were 23 insect field plots and 62 pest sites. A total of 54 larvae were found, 18 adults, and the average insect field rate was 48%. The average insect population per square meter was 0.7, which was higher than that of the previous years.
In recent years, thanks to the promotion of high stubble wheat and no-tillage sowing techniques for maize, favorable environmental conditions have been provided for armyworm breeding. In addition to the weather forecast, there will be a rainfall process on June 29-30, which will be beneficial to the hatching and spawning of a generation of adults and the hatching of second-generation larvae. Therefore, the Plant Protection Station reminded all towns (districts) and the majority of farmers to be alert to the occurrence of corn stickworms, and to do a good job of prevention and control to ensure the safety of autumn grain production this year.
Prevention:
First, agricultural control:
1. Remove field weeds and wheat stubble to improve the microclimate in the field.
2. Manually kill in the early morning and early evening.
Second, chemical control:
1, bait prevention and control: 90% crystal trichlorfon 50 grams of water 1-2 pounds mix 10 pounds of sauteed bran, in the evening the poison bait sprinkled on the corn leaves, or with 4.5% carbofuran granules 250 g / Mu lose heart control.
2, spray control: with 4.5% high efficiency cypermethrin EC 30 ml/mu and 48 chlorpyrifos 30 ml/mu mixed 1000 times liquid field spray.
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