Study on herbicidal activity of innovative compound ZJ1835, N-phenyl-2-(4,6-dimethoxy-2-oxypyrimidine)-6-chlorobenzylamine

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.