【摘要】 白花水八角是一种新生的稻田杂草。该草在佳木斯地区6月中旬为出苗盛期,下旬至7月中旬为分枝期,此期已在叶腋中开白色花、结实。每株可生20～30个蒴果,每果内含250～350粒种子,成熟后自然脱落、传播。全生育期为80～90d,危害水稻减产可达25％左右。可用48％苯过松及其与二甲四氯混用防治。更多还原

【Abstract】 Gratiola japonicn Miq is a kind of new raised weed in rice field. The booming period of emerging seedlings is at mid-June. At branch period between the last ten days of June to the first ten days of July, it blooms for white flowers and bears fruits. There are 250-350 seeds each capsule and 20-30 capsules each plant follow down naturally when they were ripe. It make rice decline yield about 25%, so use 48% Bentazone and Agritox to prevent and cure.更多还原