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经济合理而有效的植物保护措施,在颇大程度上取决于对害虫的物候知识.特别是多化性害虫,其代数和准备过冬等发育动态,按自然分布和年限有重大的变化,地带和季节的差异及与作物发育期相结合,成为它为害性主要原因之一,草地螟就是这种害虫.它的发育期有延续1～4代的特征,取决于气候和天气条件而定.加之,害虫的多食性,可在各种作物上不同温度下发育.由于这个缘故,往往组成不一致的种群.所以,
Economically sound and effective plant protection measures depend to a large extent on the phenological knowledge of pests, especially the multiplicity of pests, their algebraic and overwintering developmental dynamics, which vary greatly according to their natural distribution and age, Seasonal differences and the development of the crop combine to become one of the main causes of its harmfulness, the grass borer is such a pest, its developmental period has 1 to 4 generations of features, depending on the weather and weather conditions may be. , Pests and more food can be developed in a variety of crops at different temperatures, due to this reason, often form inconsistent populations.So,