一、水稻品种苗期抗褐稻虱鉴定 1、材料及方法(1)供测材料来源于四,省院稻麦所1997份;省种子公司60份;地、县农科所等30份;国际水稻所褐虱测定圃(IRBPHN)234份。 (2)测定方法采用大型水泥测定池,土厚6-7寸,鉴定品种浸种催芽后成单行粒播,一个品种一行,15-20粒(视种子数量),行距3厘米,粒距1.5厘米,池盖用尼龙纱或塑料(30目),2叶期接虫,池里保持水层,株接2-3龄(以三龄为主)若虫6-8头,每10个测定种设一感虫对照(TN1)与抗虫对照 First, the identification of rice varieties resistant to brown planthopper seedling stage 1, materials and methods (1) for the test materials from four, 1997 Provincial Rice and Wheat; provincial seed companies 60; The International Rice Brown Fungus nursery (IRBPHN) 234 copies. (2) Determination of the method Large-scale cement measuring pond, 6-7 inches of soil thickness, the identification of varieties soaked into a single row after sowing, a variety line, 15-20 (depending on the number of seeds), spacing of 3 cm, 1.5 cm , The pool cover with nylon yarn or plastic (30 mesh), 2 leaf stage pick worms, the pool to maintain the water layer, then 2-3 years old (to third instar) nymphs 6-8, 10 kinds of measurement species A susceptible control (TN1) and insect control