昆虫病原真菌及部分药用植物对甘蓝蚜虫的杀虫效果评价

IF 1.8 Q2 AGRONOMY

Advances in Agriculture Pub Date : 2022-07-01 DOI:10.1155/2022/7334151

Gebreegziabher Gebreyohans, Nafyad Ibrahim Batu, J. Sasikumar

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引用次数: 0

摘要

杀虫剂如昆虫病原真菌和药用植物提取物可作为综合虫害管理的组成部分。生物防治剂如真菌分离物可作为综合虫害管理的一个组成部分。在室内和温室条件下，研究了印楝(Azadirachta indica)和刺柳(Justicia schimperiana)植物提取物和两株昆虫病原真菌对埃塞俄比亚油菜(Brassica carinata)两期(成虫和若虫)白菜害虫(蚜虫)的防治效果。考察了不同处理对白菜蚜虫的防治效果，并记录了植物提取物和昆虫病原真菌对白菜蚜虫的防治效果。不同天数记录的蚜虫死亡率有显著差异。喷施6 d后，成虫数量由8.65只/株逐渐减少到2.77只/株，效果最好。在1 × 108分生孢子/mL喷施6 d后，BEI1的成虫数量由11.2只/株降至6.5只/株，效果最佳。本研究结果表明，利用昆虫病原真菌和植物提取物的组合来治理芸苔蚜是可能的。结果表明，给定的组合对减少芸苔蚜(蚜虫)的侵害有相当大的效果。结果表明，喷施6 d后，籼稻+ BEI1成虫数量由7.01只/株降至1.74只/株，效果最佳。一般情况下，在施用第6天，植物提取物处理对成虫的死亡率最高，其次是共施。同样，昆虫病原真菌的分生孢子悬浮液对成年蚜虫也有很高的活性。因此，在目前研究结果的基础上，真菌分离物和植物提取物的产物应用于进一步的害虫防治试验。

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Pesticidal Evaluation of Entomopathogenic Fungi and Selected Medicinal Plants against Cabbage Aphid (Brevicoryne brassicae L.)

Pesticidal agents such as entomopathogenic fungi and medicinal plant extracts can be used as a component of integrated pest management. Biocontrol agents such as fungal isolates can be used as a component of integrated pest management. An evaluation of plant extracts from Azadirachta indica and Justicia schimperiana and two strains of entomopathogenic fungi were carried out on Ethiopian rape (Brassica carinata) against two stages (adult and nymph) of cabbage insect pests (aphids) in the laboratory and greenhouse condition. The efficacies of different treatments were examined, and results were recorded for plant extracts and entomopathogenic fungi on cabbage aphids. A significant difference was observed in the mortality of aphid insect pests recorded at different intervals of days. The adult aphid was reduced gradually from 8.65/plant to 2.77/plant after six days of spraying with A. indica indicating the highest efficacy. Moreover, the adult aphids after spraying of entomopathogenic fungi (BEI1) reduced from 11.2/plant to 6.5/plant after six days of spraying at 1 × 108 conidia/mL, showing the highest efficacy. The present results suggest the possibility of using a combination of entomopathogenic fungi and plant extracts to manage Brevicoryne brassicae (aphids). It revealed that a given combination displayed considerable efficacy to reduce B. brassicae (aphids) infestation. From the result, the adult aphids sprayed with A. indica + BEI1 reduced from 7.01/plant to 1.74/plant after six days of spraying with the highest efficacy. Generally, maximum percent of mortality was identified in plant extract treatment next to coapplication against adult aphids on sixth day of application. Similarly, conidial suspension of entomopathogenic fungi was found to have high activities for adult aphids. Therefore, based on the present result, products of fungal isolates and plant extracts should be used for further tests against other insect pests.

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