稻田恶性杂草防除药剂配方的筛选

杂草是目前严重影响水稻生产的主要障碍。经田间药效试验确定了37.5%苯.二甲水剂的适用剂量为：防治扁秆藨草、日本藨草、藨草等恶性杂草为3000-3750 mL.hm^-2;防治鸭舌草、慈菇、泽泻、谷精草和狼巴草等一般阔叶杂草则为2250 mL.hm^-2,施药适期是在杂草出齐后开花前排水喷雾茎叶处理,对水稻安全。对扁秆藨草、日本藨草和藨草的防效达98%-100%。

Screening of Herbicide Complex Formula of Malignant Weeds in Paddy Field

Currently, various weeds in paddy field are the main serious obstacles for rice production. From control effect experiment in paddy field,it showed that the suitable dosages of 37. 50% bentazon. MCPA AC were 3 000-3 750 mL· hm^2 to control which were underground stem tuber perennial root malignant weeds in paddy field such as Japanese bulrush, flatstalk-bulrush, bulrush, rush-like bulrush, cattail etc; 2 250 mL · hm^-2 to control general broad-leaf weeds such as sheathded monochoria, arrowhead, oriental water plantain, Arenaria serpyllifolia and Bidens tripartita etc. Preferable application should spay the stem and leaf with water fog after weeds grow up and before bloom. It was safe to rice. The control effect was up to 98 % - 100 % to Japanese bulrush, flatstalk-bulrush, bulrush, etc.