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4种杀虫剂对芒果蓟马的田间防效

2021-04-02何文蒋婷卢艳春徐东英符策谭德锦彭崇杨志强

农业研究与应用 2021年6期

何文 蒋婷 卢艳春 徐东英 符策 谭德锦 彭崇 杨志强

摘 要:为了探究4种常用杀虫剂对芒果蓟马的防效,本研究在百色田阳芒果基地开展不同杀虫剂防治芒果嫩梢蓟马的田间试验。结果表明20%多杀·甲维盐SC 30 g a.i.·hm-2在药后7 d内的防效均在78%以上,防效最佳,其次是6%乙基多杀菌素SC 9 g a.i.·hm-2在药后7 d内的防效在71%以上,20%吡虫啉SLX和25%吡虫·异丙威WP两种浓度处理的防效均在60%以下。因此在芒果蓟马防治上建议将20%多杀·甲维盐和6%乙基多杀菌素与其他杀虫剂轮换使用,同时加强区域统一防治,以提高防效。

关键词:芒果;蓟马;杀蟲剂;乙基多杀菌素

中图分类号:S763                               文献标志码: A

Field Control Effects of Four Insecticides on Mango Thrips

HE Wen,JIANG Ting,LU Yanchun,XU Dongying,FU Ce,

TAN Dejing,PENG Chong,YANG Zhiqiang*

(Guangxi South Subtropical Agricultural Sciences Research Institute,

Longzhou,Chongzuo 532415,China)

Abstract:In order to explore the field control effects of four commonly used insecticides on mango thrips,field trial of different insecticides in the control of mango thrips was carried out in the mango base of Tianyang,Baise. The results showed that,within 7 days after application,the control effect of 20% carbendazim-methyl emamectin benzoate SC 30 g ai·hm-2 was above 78%,that of 6% spinetoram SC 9 g ai·hm-2 was above 71%,and that of 20% imidacloprid SLX and 25% imidacloprid·isoprocarb WP were both below 60%. Therefore,in the control of mango thrips,it is recommended that 20% carbendazim-methyl emamectin benzoate and 6% spinetoram should be used in rotation with other insecticides,while strengthening the unified regional control to improve the control effect.

Key words:Mango;thrips;insecticide;spinosyn

广西百色市是我国第一大芒果产区,芒果产业在农民增收中发挥着重要作用[1],特别是在脱贫致富和乡村振兴中发挥了积极作用。蓟马是芒果的主要害虫,在芒果嫩梢期、花期及果期均可发生为害[2]。芒果蓟马种类有10多种,其中茶黄蓟马和黄胸蓟马为优势种。蓟马体型微小,繁殖力极强,短期内可大量暴发为害[3-4],已成为芒果生产上最主要的害虫[5]。芒果果实被蓟马为害后,产量和商品经济价值都收到严重影响,可造成减产10%~42%[6],极大的限制了芒果产业发展。

自2001年以来,由于全球气候变暖、芒果栽培面积扩大等因素有利于蓟马发育、繁殖和为害,芒果蓟马的危害越来越严重[5]。张中润等[7]通过对40个芒果品种的蓟马抗性进行评价,筛选出5个具有较好抗性的品种。丁春霞等[5]研究发现不同品种芒果对蓟马的抗性水平存在差异。……

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