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广东各地水稻大面积发生稻飞虱为害,均以稻褐飞虱为主。根据我们近年的调查结果,对稻褐飞虱的发生和近期预测作如下初步分析。一、为害的严重性稻褐飞虱均在早晚造水稻的中后期(孕穗期——黄熟期)发生成灾,水稻受害后所造成的损失是很大的(表1)。群众普遍反映:褐飞虱的发生为害有“两快、两大”,即虫口增长快、成灾快,发生面积大、危害损失大。近几年来由于耕作制的改革,品种的革新和种植规格较密,若肥水管理控制不当,容易造成褐飞虱发生的有利条件,
Rice planthoppers were the most widespread in all parts of Guangdong, with the majority of them being BPH. Based on our findings in recent years, the preliminary analysis of the occurrence and recent prediction of rice brown planthopper is as follows. First, the seriousness of the damage The brown planthopper occurred sooner or later in the late rice (booting - yellow stage) disaster occurred, the damage caused after the rice is very large (Table 1). The general public said: The occurrence of brown planthopper harm “two fast, two big”, that is, rapid population growth, rapid disaster, the occurrence of large area, endanger the loss. In recent years due to farming system reform, breed innovation and planting specifications more closely, if the fertilizer and water management control is inappropriate, likely to cause favorable conditions for the brown planthopper occurred,