Yang Chengyu from Jiangba Township, Hongze County came to the telephone and said that the rice planthoppers in the rice fields are in serious condition. He asked whether chlorpyrifos and Wick (containing 29% phoxim and 1% lambda-cyhalothrin) can be used for prevention and treatment. Yancheng Hucheng, Yandu District, Yancheng City, said that the rice in his family had just broken, and that there were many brown rice planthoppers and rice leaf roller in the field. Several times earlier, they were treated with cyhalothrin and phoxim. Not good. He asked what chemicals should be used to control rice leaf roller and rice planthoppers. Bao Zhaolin, a farmer at Baoying Lake in Jinhu County, came to the telephone and said that rice is in the flowering stage and the amount of rice planthoppers in the field is large. He asked if it can be prevented or prevented by the use of kumquat.
A. Chrysanthemum pesticides can cause rice planthoppers to re-cyhalothrin and marrifolate belong to pyrethroid pesticides. The use of pyrethroid pesticides in rice fields can cause rice planthoppers to retreat. Studies have shown that pyrethroid pesticides cause the main reason for the replantation of rice planthoppers: First, conventional doses cannot effectively kill rice planthoppers, or they can only kill part or the majority of rice planthoppers, and their efficacy is short and cannot be sustained. Maintain control of rice planthoppers. The second is that pyrethroid pesticides can stimulate the fertility of rice planthoppers and increase the amount of eggs laid, so that the population of rice planthoppers in the application area exceeds the non-drug area. Third, pyrethroid pesticides largely killed the major natural enemies of rice planthoppers such as rice field spiders and black-shouldered green-nosed locusts, so that the remaining rice planthoppers and their offspring lost control of natural enemies. The population of rice planthoppers continued to increase.
Second, the prevention and control of brown planthopper should be combined with long-acting and short-acting pesticides. According to the latest report from the Jiangsu Provincial Department of Agriculture and Forestry Plant Protection Station, the current brown planthopper size in our province is generally higher than that of the same period last year, showing a large-scale ecological situation. For fields with large numbers of brown planthoppers in the field, pyrethroid pesticides and their compounding agents should be avoided. It is advisable to use chlorpyrifos, isoprocarb, and propofol, etc. for quick killing agents and fipronil and flutter. The use of a long-acting agent such as bufalin. If the field is to concurrently treat rice leaf roller, it may be preferred to use pesticides such as Frigoxylate or chlorpyrifos, or to add avermectin, thallone and other drugs.
vitamin A series
Vitamin A Series
vitamin A series
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