From July 31 to August 7, the weather continuously rained; According to the forecast, it is likely that rain will continue in the next few days, creating favorable conditions for the 3th generation of white-backed planthoppers to bloom; Density of planthoppers in high places 8-4 individuals/m2, locally over 1.000 animals/m2 concentrated in the southern districts of the province; The density of leafhoppers is higher than that of the same period last year, so there is a very high risk of outbreak of black-striped dwarf disease in the crop of 2023. Small leaf rollers of age 5 have a common density of 3-7 insects/m2, 15-20 fish/m2 high, 40-50 fish/m . locally2, deep source 4-5 times higher than the same period last year; High density of depth is distributed locally on early good rice area. In addition, the adult 2-spotted borer appeared scatteredly, with a height of about 0,2-0,3 insects/m .2, the density of eggs in high places is 0,2-0,3 nests/m2, especially in some places 1-2 drives/m2, concentrated distribution in areas with rotten rice, abandoned fields; in some places with high resources such as Trung Dong, Truc Tuan, Liem Hai (Truc Ninh) communes, the density is much higher than the average of many years.
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| Actively avoiding the rain, people in Dai Thang commune (Vu Ban) sprayed insecticides against white-backed planthoppers, preventing the risk of black-striped dwarf disease arising from crop damage. |
In order to proactively minimize the risk of black-striped dwarf disease and rice pests in the 2023 crop, the Department of Agriculture and Rural Development suggested that districts and cities assign specialized staff to closely coordinate with them. with communes and townships to propagate and urge farmers to strengthen field inspection, avoid the weather to promptly spray pesticides to prevent and control pests. Urgently spray insecticides against planthoppers of the 4th generation in combination with the 5th generation of small leaf rollers, concentrated from now until 7-8 according to the guidance of the Department of Agriculture and Rural Development. Monitoring and spraying 2-dot stem borer for areas with nest density of more than 0,3 nests/m2 with drugs with active ingredients Chlorantraniliprole, Chlofenapyr.
News, photos: Van Dai
