30%苄嘧·苯磺隆WP对春小麦田杂草的防效及安全性评价

Control Effect and Crop Safety of Bensulfuron-methyl and Tribenuron-methyl 30% WP against Broad-leaf Weeds in Spring Wheat Fields

采用田间试验方法研究了30%苄嘧.苯磺隆WP对春小麦田杂草的控制效果和应用安全性。结果表明,30%苄嘧.苯磺隆对田间阔叶杂草具有较好的防除效果,于春小麦3～5叶期每公顷施用30%苄嘧.苯磺隆WP 281.25～337.50 g/hm2对水300 kg茎叶喷雾,可有效防除密花香薷(Elsholtzia densa)、遏蓝菜(Thlaspi arvnse)、藜(Chenopodium album)、苦苣菜(Sonchus oleraceus)等阔叶杂草;在以大刺儿菜(Cephalanoplos setosum)、泽漆(Euphorbia helioscopia)为优势种群的春麦田需增大剂量至337.50 g/hm2。对供试的乐麦5号和高原483春小麦安全,除草后小麦增产12.02%～17.38%,增产效果总体优于对照药剂。

To provide guidance for chemical weed management in spring wheat fields,experiments were conducted to evaluate the weed control effects and crop safety of Bensulfuron-methyl and Tribenuron-methyl 30% WP.The results showed that Bensulfuron-methyl and Tribenuron-methyl 30% WP has very good efficacy on Elsholtzia densa,Thlaspi arvnse,Chenopodium album,Sonchus oleraceus,etc..Its normal dosage is 281.25～337.50 g/hm2 with 300 kg water in the term of 3~5 leaf-age of spring wheat.The dosage should increase to 337.50 g/hm2 in spring wheat field where the dominant species were Cephalanoplos setosum and Euphorbia helioscopia.Bensulfuron-methyl and Tribenuron-methyl 30% WP was safety to spring wheat variety Lemai 5 and Gaoyuan 483;the yield of wheat was increased by 12.02%～17.38% than CK and ecceeded that of the compared herbicides.