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试验发现晚粳“丙620”为抗褐稻虱及白背稻虱的新品种。褐稻虱及白背稻虱迁入时呈随机降落,对水稻品种无选择性,定居后,由于该品种不适宜其产卵和取食,才与非抗性品种的虫量差距不断扩大。但该品种对灰稻虱不具抗性。“丙620”品种分蘖力强,结实率及千粒重均高,但该品种植株偏高、不耐肥、易倒伏,大面积推广时,必须辅以相应的栽培技术加以调节,在合理的配套栽培措施下,亩产均能超千斤。
It was found that the late japonica rice “C 620” was a new variety resistant to the brown planthopper and white backlit planthopper. The brown planthopper and the white backed planthopper landed randomly at the time of their migration, and had no selectivity for rice varieties. After settling, the gap between the number of non-resistant cultivars and that of the non-resistant cultivars was continuously widened because of their unfitness for spawning and feeding. However, the species is not resistant to the gray pest. “C 620” has the features of strong tillering ability, seed setting rate and 1000-grain weight. However, the varieties of plants are high, non-fertilizer-resistant and prone to lodging. When popularized in a large area, they must be supplemented with appropriate cultivation techniques to adjust them. Measures, per mu can exceed super-kilograms.