Journal of Crop Protection
Journal of Crop Protection
JCP
Agriculture
http://jcp.modares.ac.ir
1
admin
2251-9041
2251-905X
en
jalali
1395
6
1
gregorian
2016
9
1
5
3
online
1
fulltext
en
Short and long term effects of some bio-insecticides on Tuta absoluta Meyrick (Lepidoptera: Gelechiidae) and its coexisting generalist predators in tomato fields
Tomato leaf miner, <em>Tuta absoluta</em> Meyrick (Lepidoptera: Gelechiidae), is one of the most destructive pests of tomato in many parts of the world including Iran. Field studies were conducted to determine the short and long term effects of <em>Bacillus thuringiensis</em> var Kurstaki (Bt), azadirachtin (AZ), a mix of AZ + Bt, and indoxacarb, as a current chemical insecticide, on <em>T. absoluta </em>larvae. Also, effects of the insecticides were studied on the coexisting generalist predators, <em>Coccinella septempunctata </em>L., <em>Chrysoperla carnea</em> Stephens and <em>Syritta</em> sp. Sampling of <em>T. absoluta </em>and its coexisting generalist predators were performed 1 day before treatment (DBT) and one, 5, 8, 14 and 19 days after treatment (DAT). The results indicated significant short term effect of indoxacarb on the pest larvae. Indoxacarb reduced <em>T. absoluta </em>density and damages. Bt, AZ and mixture of them significantly suppressed the larval density at 19 DAT and caused significant reduction in leaf, stem and fruit damage. The highest long term effect on the pest abundance and damage were observed in Az + Bt caused 100% reduction in fruit and foliage damage compared to the control. The highest and lowest adverse effects on <em>C. carnea</em>, <em>C. septempunctat</em> and <em>Serrita</em> sp. were observed in indoxacarb and Bt treatments, respectively. Findings of this study imply that the mixture of Az + Bt has the highest selective toxicity on the pest and the lowest effect on its coexisting generalist predators. <strong> </strong>
Tomato,leafminer,Bt,Azadirachtin,indoxacarb,toxicity
331
342
http://jcp.modares.ac.ir/browse.php?a_code=A-3-1000-3554&slc_lang=en&sid=3
Leila
Nazarpour
Leila
Nazarpour
100319475328460062235
100319475328460062235
No
Department of Plant Protection, Faculty of Agriculture, Ramin Agriculture and Natural Resources University of Khuzestan, Mollasani, Ahwaz, Iran.
Department of Plant Protection, Faculty of Agriculture, Ramin Agriculture and Natural Resources University of Khuzestan, Mollasani, Ahwaz, Iran.
Fatemeh
Yarahmadi
Fatemeh
Yarahmadi
100319475328460062233
100319475328460062233
Yes
Department of Plant Protection, Faculty of Agriculture, Ramin Agriculture and Natural Resources University of Khuzestan, Mollasani, Ahwaz, Iran.
Department of Plant Protection, Faculty of Agriculture, Ramin Agriculture and Natural Resources University of Khuzestan, Mollasani, Ahwaz, Iran.
Moosa
Saber
Moosa
Saber
100319475328460062242
100319475328460062242
No
Department of Plant Protection, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.
Department of Plant Protection, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.
Ali
Rajabpour
Ali
Rajabpour
100319475328460062236
100319475328460062236
No
Department of Plant Protection, Faculty of Agriculture, Ramin Agriculture and Natural Resources University of Khuzestan, Mollasani, Ahwaz, Iran.
Department of Plant Protection, Faculty of Agriculture, Ramin Agriculture and Natural Resources University of Khuzestan, Mollasani, Ahwaz, Iran.