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Synergistic Action of Isaria fumosorosea Wize (Hypocreales: Cordycipitaceae) and Spirotetramat against Asian Citrus Psyllid, Diaphorina citri Kuwayama (Hemiptera: Psyllidae) under Field Conditions

Synergistic Action of Isaria fumosorosea Wize (Hypocreales: Cordycipitaceae) and Spirotetramat against Asian Citrus Psyllid, Diaphorina citri Kuwayama (Hemiptera: Psyllidae) under Field Conditions

Muhammad Fiaz1*, Muhammad Afzal1 and Muhammad Zeeshan Majeed1,2 

1Department of Entomology, College of Agriculture, University of Sargodha, Sargodha 40100, Pakistan; 2State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China. 

muhammadfiaz985@yahoo.com

ABSTRACT

Combing pesticides with different modes of action is a crucial component of pest management strategies. In this study, field efficacy of spirotetramat and Isaria fumosorosea formulations was assessed in spring 2016 and 2017 against Asian citrus psyllid Diaphorina citri, one of the economic insect pests of citrus plants and a putative vector of Huanglongbing worldwide. Treatments were comprised of label-recommended (FD) and its half (HD) dose rates of spirotetramat and I. fumosorosea formulations. Both treatments were applied either alone or in binary combinations. There was a significant reduction in psyllid population for all treatment combinations as compared to control (F8, 107 = 70.36; P-value = 0.001 for 2016 and F8, 107 = 63.58; P-value < 0.001 for 2017). Combined application of spirotetramat along with I. fumosorosea formulation has shown a significant synergistic effect against D. citri infestation and is recommended to citrus growers against sucking insect pests. 

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Pakistan Journal of Agricultural Research

September

Vol.37, Iss. 3, Pages 190-319

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