The combination of destruxin a with insecticide chlorantraniliprole increases virulence against Plutella xylostella L. | [Pakistan Journal of Zoology • 2016]

Author(s):

1. Zhen Huang: Engineering Research Center of Biological Control, Ministry of Education, College of Agriculture, South China Agricultural University, Guangzhou, China

2. Shaukat Ali: Engineering Research Center of Biological Control, Ministry of Education, College of Agriculture, South China Agricultural University, Guangzhou, China

3. Shunxiang Ren: Engineering Research Center of Biological Control, Ministry of Education, College of Agriculture, South China Agricultural University, Guangzhou, China

Abstract:

Diamondback moth, Plutella xylostella, is a major worldwide pest of cruciferous vegetables and has developed high levels of resistance against many pesticides. The current research presents the joint action of destruxin A and chlorantraniliprole against resistant strain of Plutella xylostella were bioassayed under laboratory and field cage conditions. An apparent increase in adjusted larval mortality in a dose-dependent manner was observed when destruxin A and chlorantraniliprole were applied individually. The level of synergism between destruxin A and chlorantriniliprole was affected by the concentration of each component in the mixtures. The synergistic effects were observed in treatments (80.0+3.0), (40.0+1.0), (40.0+3.0) and (80.0+1.0), respectively. The treatments (40.0+3.0) and (80.0+0.3) were determined as additive effects according to their cumulative adjusted mortalities, Me and Chi-square values. In field cage experiments synergistic action was observed for 80.0+3.0 treatment with its cumulative mortality values of 69.93 / 87.05 / 98.87% at 48, 72 and 96 H post-treatment while additive effects were observed for treatments (40.0+0.3), (40.0+1.0) and (80.0+0.3).

Page(s): 1849-1855

DOI: DOI not available

Published: Journal: Pakistan Journal of Zoology, Volume: 48, Issue: 6, Year: 2016

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