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对水稻中热品种生长期的物候学研究表明,水稻在大田的生长分为三个明显的生育期,即分蘖期或营养生长期(移栽后5—40天),生殖生长期或稻穗发育期(移栽后40—75天),成熟期(移栽后75—105天)。在目前新的水稻栽培制度下,造成产量损失的害虫主要有三种:分蘖期的稻瘿蚊、生殖生长期的三化螟和成熟期的褐飞虱。15年来,为了防治这三种害虫,选育了许多抗虫品种,但由于这些品种并非在各生育期
The phenological studies on the growth of rice mesothermal varieties show that the growth of rice in the field is divided into three distinct growth stages, that is tillering or vegetative growth (5-40 days after transplanting), reproductive growth or panicle Developmental period (40-75 days after transplanting), maturity (75-105 days after transplanting). Under the new rice cultivation system, there are mainly three kinds of pests that cause loss of production: rice gall midge at tillering stage, yellow rice borer in reproductive growth stage and brown planthopper in mature stage. In the past 15 years, many insect-resistant varieties have been bred in order to prevent these three kinds of pests. However,