论文部分内容阅读
为筛选防治刺萼龙葵的安全、高效除草剂,采用温室盆栽法评价21种苗后阔叶除草剂对刺萼龙葵的防治效果,并对防效较好的药剂进行室内生物测定。结果表明,在田间推荐剂量下,有7种药剂对刺萼龙葵的防效较好,鲜质量抑制率>90.0%,其中辛酰溴苯腈对刺萼龙葵的活性最高,ED90为67.31 g/hm2(有效成分);氟磺胺草醚最低,ED90为795.47 g/hm2(有效成分)。7种除草剂ED90由高到低的依次为辛酰溴苯腈、氯氟吡氧乙酸、百草枯、三氯吡氧乙酸、氨氯吡啶酸、草甘膦、氟磺胺草醚。综合考虑药剂活性及其推荐剂量,辛酰溴苯腈、氯氟吡氧乙酸、百草枯、三氯吡氧乙酸、氨氯吡啶酸和草甘膦均可在低于推荐剂量下用于防除刺萼龙葵,但使用氟磺胺草醚时应适当增加用量。
In order to screen the safe and efficient herbicide of Solanum nigrum, the greenhouse seedling efficacy was evaluated in 21 pot seedlings with broadleaf herbicides on Solanum lycopersicum and its indoor bioassay was carried out. The results showed that in the field recommended dose, there are 7 kinds of agents on the Calyx optimal control effect, the fresh mass inhibition rate> 90.0%, which octaclor bromoxynil Calyx highest activity, ED90 was 67.31 g / hm2 (active ingredient); fomesafen minimum, ED90 is 795.47 g / hm2 (active ingredient). The order of descending order of the seven herbicide ED90 was octaclor bromoxynil, flurbiprofen, paraquat, triclopyr, picralin, glyphosate and fomesafen. Taking into account the activity of the drug and its recommended dose, octaclor bromoxynil, flurbiprofen, paraquat, triclopyr, picralin, and glyphosate can be used at a lower dosage than recommended Calyx longan, but the use of fomesafen should be appropriate to increase the dosage.