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Insecticide toxicity and walking response of three pirate bug predators of the tomato leaf miner Tuta absoluta
Author(s) -
Pereira Renata R.,
Picanço Marcelo C.,
Santana Paulo A.,
Moreira Suzana S.,
Guedes Raul N. C.,
Corrêa Alberto S.
Publication year - 2014
Publication title -
agricultural and forest entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.755
H-Index - 55
eISSN - 1461-9563
pISSN - 1461-9555
DOI - 10.1111/afe.12059
Subject(s) - indoxacarb , biology , abamectin , tuta absoluta , toxicology , leaf miner , imidacloprid , predation , toxicity , pest analysis , pesticide , beneficial insects , integrated pest management , botany , agronomy , ecology , chemistry , gelechiidae , organic chemistry
The tomato leaf miner Tuta absoluta is a key pest of the tomato and is of global significance. Insecticide is the primary method for controlling this pest, requiring a search for compounds with a low toxicity to nontarget organisms. We assessed the toxicity of eight insecticides to T. absoluta and its pirate bug predators Orius tristicolor, Amphiareus constrictus and Blaptostethus pallescens ( H emiptera: H eteroptera: A nthocoridae). We also assessed the effect of insecticide synergists on their toxicity to the predators, as well as their walking response to insecticide exposure. All insecticides, with the exception of methamidophos, exhibited the minimum efficacy threshold required by the B razilian legislation (80% efficacy) at concentrations lower than the registered label rates. Indoxacarb and chlorantraniliprole exhibited a lower toxicity to the pirate bug predators than to the tomato leaf miner. The results obtained with the synergized insecticides suggest the involvement of cytochrome P450 ‐dependent monooxygenases as the primary detoxification enzymes minimizing insecticide toxicity in the pirate bug predators. The insecticides led to a reduction in predator walking activity, especially abamectin and indoxacarb, which significantly minimized predator exposure. The results of the present study indicate that novel insecticides, especially chlorantraniliprole, are better suited to sustainable integrated management programmes of the tomato leaf miner.