快灭灵40DF防除小麦田杂草的效果及其对小麦的安全性

Effects of Weed Control and Security of Wheat in Wheat Field With Affinity

快灭灵４０ＤＦ是美国ＦＭＣ公司研制的新型禾谷类作物田除草剂。在小麦４～６叶期，喷施快灭灵４０ＤＦ２２．５ｇ／ｈｍ２对麦田新的优势阔叶草种（野老鹳草、泽漆）具有较好的防效，对大巢菜和繁缕的防效为８０％～８５％，但是对禾本科杂草无效；快灭灵４０ＤＦ与异丙隆５０ＷＰ混配使用，可以提高含禾本科杂草、繁缕和大巢菜的总草防效，小麦增产显著；快灭灵４０ＤＦ与甲黄隆或者巨星混配后，对阔叶草（野老鹳草、泽漆、大巢菜和繁缕等）的防效达９０％以上；施用快灭灵４０ＤＦ４５～６７．５ｇ／ｈｍ２，小麦叶片出现白色斑点中毒症状，但不影响小麦产量。

Affinity is a new herbicide developed by American FMC for use in grain crop fields. Experiments were conducted in 1996～1998 to evaluate the effects of affinity on the weed control and the security of wheat. The experiment results showed that many major broad-leaved weeds such as G. aparine, V. didyma Tenore, C. bursa-pastoris, G. carolinianum, E. helioscopia, S. nedua and V. sativa L. were effectively controlled by application of affinity at 22.5 g/hm 2 at four to six-leaf stage of wheat and wheat yield increased. Wheat were injured from affinity at 45～67.5g/hm 2 but yields were not reduced. Beckmannia syzigachne, V. sativa L. and S. nedua control with affinity increased up to more than 90% with addition of isoproturon respectively and wheat yield increased effectively. Affinity with methsulfuron-methy at 5.25g/hm 2 or express at 9g/hm 2 raised more S. nedua and V. sativa L. control than affinity applied alone.