摘要:
为明确新化合物N-苯基-2-(4,6-二甲氧基-2-嘧啶氧基)-6-氯-苄胺(ZJ1835)在棉花田的应用前景,就其对棉花的安全性、选择性、杀草谱和田间应用技术进行了研究。室内生物测定结果表明,ZJ1835对棉花生长初期有一定矮化作用,但不影响出苗和后期生长,在有效剂量225 g/hm2下对棉花安全性好;对不同棉花品种之间的安全性有一定差异,其中对王岳9913的安全性最好,其次为银山1号和福棉6号,对冀丰197安全性略差;该化合物在棉花与马唐、反枝苋之间的选择性系数分别为2.14和13.00,具有较好的选择性;多数田间常见杂草对其敏感,杀草谱较广。田间试验结果显示,ZJ1835在90～120 g/hm2有效剂量下对供试棉花安全性好,对棉田杂草总防效为82.1%～92.8%,具有一定的开发应用潜力。
Abstract:
In order to demonstrate the development and application value of a novel compound ZJ1835 ,its safety to cotton,selectivity,spectrum of weed control and field application technology were studied.The result of greenhouse tests showed that ZJ1835 could dwarf plant in the early growth stage of cotton,but did not affect cotton emergence and later stage growth,and it was safe to cotton at dosage of 225g(a.i.)/ha.There was difference in the safety of ZJ1835 to four cotton varieties,i.e. the safety to wangyue-9913 was the highest,yinshan-1 and mian-6 was the second,and jifeng-197 was the lowest.The selectivity coefficient of ZJ1835 between cotton and Digitaria sanguinalis and Amaranthus retroflexus were 2.14 and 13.00,respectively,which showed that the compound had good selectivity.The great majority of weeds in field were sensitive to ZJ1835,and the spectrum of weed control of ZJ1835 was wide.The field test result showed that at dosage of 90～120 g(a.i.)/ha,the compound had good safety to cotton,and the total weeds controlling efficacy was 82.1%-92.8%.The results suggested that ZJ1835 had potentials of development and application in cotton.
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