Journal of Crop Protection
Journal of Crop Protection
JCP
Agriculture
http://jcp.modares.ac.ir
1
admin
2251-9041
2251-905X
en
jalali
1392
6
1
gregorian
2013
9
1
2
3
online
1
fulltext
en
Comparative efficacy of controlled atmospheres against two stored product insects
Effect of controlled atmospheres (CAs) at various concentrations of CO<sub>2</sub>, N<sub>2</sub> and O<sub>2</sub> on the lethal times of <em>Tribolium castaneum </em>and <em>Trogoderma granarium</em> was investigated at 20 and 30 ºC. Experiments were performed using a recirculatory multi-flask apparatus. The results revealed that, the shortest times (0.1, 0.3 and 0.9 day for adults, larvae and pupae, respectively) required to obtain 50% mortality of <em>T</em>.<em> castaneum</em> stages were at 100% CO<sub>2</sub> followed by 75% CO<sub>2</sub>, 50% CO<sub>2</sub>, 99% N<sub>2</sub> + 1% O<sub>2</sub> and 25% CO<sub>2</sub>, at higher tested temperature (30 <sup>°</sup>C). Adults were more sensitive to the different treated CAs than larvae, while pupae were the most tolerant stages. Diapausing larvae of <em>T. granarium</em> were the most tolerant to all treated CAs at tested temperatures. The effectiveness of CAs to decrease its LT<sub>50</sub> values were 100% CO<sub>2</sub> followed by 99% N<sub>2</sub> + 1% O<sub>2</sub> and 98% N<sub>2</sub> + 2% O<sub>2</sub> at 30<sup>°</sup>C. It may be concluded that diapausing larvae are more difficult to control with CAs than normal larvae. A treatment with N<sub>2</sub> relying on the absence of O<sub>2</sub> will take a longer treatment time to control the diapausing larvae and in late winter, exposure times needed for control may be even longer. If CAs were to be applied under such circumstances, a high content of CO<sub>2</sub> would be the best option to achieve control in a comparatively short time.
Tribolium castaneum,Controlled atmosphere,Trogoderma granarium,Recirculatory multi-flask apparatus
343
353
http://jcp.modares.ac.ir/browse.php?a_code=A-3-1000-6248&slc_lang=en&sid=3
Mohamed
Azab
Mohamed
Azab
100319475328460040363
100319475328460040363
Yes
Plant Protection Department, Faculty of Agric., Benha Univ., Qalubia, Egypt.
Plant Protection Department, Faculty of Agric., Benha Univ., Qalubia, Egypt.
Ahmed
Darwish
Ahmed
Darwish
100319475328460040364
100319475328460040364
No
Plant Protection Department, Faculty of Agric., Benha Univ., Qalubia, Egypt.
Plant Protection Department, Faculty of Agric., Benha Univ., Qalubia, Egypt.
Refaat
Mohamed
Refaat
Mohamed
100319475328460040365
100319475328460040365
No
Plant Protection Research Institute, Agric. Res. Center, Ministry of Agric., Giza, Egypt.
Plant Protection Research Institute, Agric. Res. Center, Ministry of Agric., Giza, Egypt.
Marwa
Sanad
Marwa
Sanad
100319475328460040366
100319475328460040366
No
Plant Protection Research Institute, Agric. Res. Center, Ministry of Agric., Giza, Egypt.
Plant Protection Research Institute, Agric. Res. Center, Ministry of Agric., Giza, Egypt.