不同药剂对麦田猪殃殃和婆婆纳的防除效果

Study on Control Effects of Different Chemicals against Catchweed bedstraw L.and Veronica didyma T.in Wheat Field

通过田间药效试验,比较双氟磺草胺、氯氟吡氧乙酸异辛酯、苯磺隆等5种除草剂单剂以及6种不同成分分别与双氟磺草胺混用对猪殃殃、婆婆纳的防除效果,以期筛选出对信阳地区麦田优势阔叶杂草猪殃殃、婆婆纳防效较好的药剂。结果表明,所有处理对小麦均较安全,个别处理前期有轻微药害后期可恢复,不影响产量。单剂以288 g/L氯氟吡氧乙酸异辛酯EC 1050 mL/hm^(2)对猪殃殃防效最好,药后40 d株防效、鲜质量防效均在96.8%以上;其次为50 g/L双氟磺草胺SC 150 mL/hm^(2),对猪殃殃株防效、鲜质量防效在91.5%~96.4%;10%苯磺隆WP 225 g/hm^(2)对婆婆纳防效好,株防效、鲜质量防效均在98.7%以上,但对猪殃殃防效差,株防效、鲜质量防效在55.7%~67.5%,说明信阳地区的猪殃殃已经对苯磺隆产生明显抗性,农业生产上必须与其他成分混用。不同成分混用,需含苯磺隆的处理才对婆婆纳有较好防效;甲基二磺隆、唑草酮与双氟磺草胺混用对猪殃殃有明显增效作用;苏州富美实植物保护剂有限公司生产的55%苯·唑·2甲钠WP 750 g/hm^(2)对猪殃殃、婆婆纳防效较好,鲜质量防效分别为91.8%、97.8%,是较优的复配产品。

Based on field trials,this study compared the control effects of 5 kinds of single herbicides(florasulam,fluroxypyr,tribenuron-methly and so on)and 6 different ingredients mixed with florasulam against Catchweed bedstraw L.and Veronica didyma T.in wheat field,to screen out herbicides with higher control effects in Xinyang.The results showed that all treatments were relatively safe for wheat,the minority with slight phytotoxicity in the early stage could be recovered later without affecting the yield.Fluroxypyr 288 g/L EC at 1050 mL/hm^(2) had the best control effects against Catchweed bedstraw L.,with the plant control and fresh weight control effects were above 96.8%after 40 d treatments.Florasulam 50 g/L SC at 150 mL/hm^(2) had better control effects(91.5%-96.4%)against Catchweed bedstraw L..Tribenuron-methly 10%WP 225 g/hm^(2) had good control effects against Veronica didyma T.,with the plant control and fresh weight control effects were above 98.7%,but had poor control effects(55.7%-67.5%)against Catchweed bedstraw L.,this showed that the Catchweed bedstraw L.in Xinyang had obvious resistance to tribenuron-methly,which must be mixed with other ingredients in agriculture production.When different ingredients were mixed,only the treatment containing tribenuron-methly had good control effects against Veronica didyma T.;mesosulfuron-methyl or carfentrazone-ethyl mixed with florasulam had synergistic effect on Catchweed bedstraw L.;55%tribenuron-methly carfentrazone-ethyl MCPA-Na WP which was produced by FMC had good control effects against Catchweed bedstraw L.and Veronica didyma T.at 750 g/hm^(2) with the fresh weight control effects were 91.8%and 97.8%respectively.It was a good compound herbicide.