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(接上期)十、含有二氯吡啶酸的玉米田除草剂田间试验在玉米田,75%二氯吡啶酸SG的推荐用量为105~270克/公顷,在玉米生长期使用,对玉米安全,不会造成药害。其对豆科和菊科多年生杂草有特效,尤其是对恶性阔叶杂草,如大巢菜、卷茎蓼、稻槎菜、鬼针草等,对小蓟、大蓟、苣荬菜等防效更好。施药时期常根据杂草的生育期来定,一般在刺儿菜10~20cm高,或苣荬菜莲座期(未抽苔)时施药。75%二氯吡啶酸SG单用135~165克/公顷对刺儿菜和苣荬菜就有较好的防效,混用莠去津、烟嘧磺隆、2,4-滴丁酯可扩大杀草谱。2011年至今,二氯吡啶酸共申请田间试验5个,其中二氯
(Continued) X. Field trials of clopyralid-containing corn field herbicides In corn fields, the recommended level of 75% Clopyralid SG is 105-270 g / ha, which is used during the corn growing season to protect the safety, Will not cause injury. The legumes and asteraceae perennial weeds have special effects, especially on the vicious broadleaf weeds, such as the big nest, Polygonum convolvulus, Tachygium, Bidens grass, thistle, thistle, Such as control better. The application period is often based on the weeds of the growing period to be set, usually in the Cephalotaxus 10 ~ 20cm high, or chinense lotus sedative (unpublished) when spraying. 75% of clopyralid SG with 135 ~ 165 g / ha on Carya and Chicory have better control effect, mixed with atrazine, nicosulfuron, 2,4-D butyl ester can be expanded Kill grass spectrum. Since 2011, clopyralid has applied for a total of 5 field trials, including dichloro