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我县水稻种植中,单季稻占85%。主要害虫二化螟形成了较稳定的发生为害规律,系统测报进行中的总体调查,发现重发年份(代次)并不是所有田发生都重,轻发年份(代次)并不是所有发生田都轻,通过试验观察逐步弄清了各代为害对象田及主导因素。验证表明,它能准确地预报防治田块、防治面积,有效地控制螟害,并且减少了成本,保护了有益生物。一、为害对象田1.一代只为害插花种植及早稻及早栽中稻(5月底以前栽),中、迟栽单季稻基本不受害(表1),为害面积占总面积30～40％。
Rice planting in my county, 85% of single-season rice. The main pest, Chilo suppressalis (Walker), formed a relatively stable pattern of damage and the system was under investigation. It was found that not all fields were reoccurred, and that not all fields were reoccurred Are all light, and through trial observation, they have gradually clarified the fields and dominant factors of various generations of victims. Verification shows that it can accurately predict the prevention and control plots, control the area, effectively control the stem borer, and reduce the cost and protect the beneficial organisms. First, the target field of harm 1. Generation only infested flower planting and early rice early planting medium (before the end of May planted), the late planting single season rice basically no damage (Table 1), the damage area of the total area of 30 to 40%.