AREF, S., BAYOUMI, O., SOLIMAN, H. (2010). EFFECT Of CERTAIN INSECTICIDES ON THE PIOTIC POTENTIAL OF THE COTTON LEAFWORM, SPODOPTERA LITTORALIS (BOISD.). Egyptian Journal of Agricultural Research, 88(1), 31-40. doi: 10.21608/ejar.2010.180201
SAFOUT A. AREF; OTHMAN SH. BAYOUMI; HEBA A.B. SOLIMAN. "EFFECT Of CERTAIN INSECTICIDES ON THE PIOTIC POTENTIAL OF THE COTTON LEAFWORM, SPODOPTERA LITTORALIS (BOISD.)". Egyptian Journal of Agricultural Research, 88, 1, 2010, 31-40. doi: 10.21608/ejar.2010.180201
AREF, S., BAYOUMI, O., SOLIMAN, H. (2010). 'EFFECT Of CERTAIN INSECTICIDES ON THE PIOTIC POTENTIAL OF THE COTTON LEAFWORM, SPODOPTERA LITTORALIS (BOISD.)', Egyptian Journal of Agricultural Research, 88(1), pp. 31-40. doi: 10.21608/ejar.2010.180201
AREF, S., BAYOUMI, O., SOLIMAN, H. EFFECT Of CERTAIN INSECTICIDES ON THE PIOTIC POTENTIAL OF THE COTTON LEAFWORM, SPODOPTERA LITTORALIS (BOISD.). Egyptian Journal of Agricultural Research, 2010; 88(1): 31-40. doi: 10.21608/ejar.2010.180201
EFFECT Of CERTAIN INSECTICIDES ON THE PIOTIC POTENTIAL OF THE COTTON LEAFWORM, SPODOPTERA LITTORALIS (BOISD.)
1Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt.
2Faculty of Agriculture, Kafrelsheikh University, Egypt.
Abstract
Treated leaves of Castor bean oil with Lc50 and Lc25 of Diflubenzuron were offered to 4th instar larvae of cotton leafworm, Spodoptera littoralis (Boisd.) for 48 hours . The percentage of mortality showed 60.71 % and 33.92 % respectively . The larval period was increased with 60.01 % and 37.5 % - The increase of pupal period showed 55.5 % and 42.67 % - Data gave an increase of the pre- oviposition period with 200.54 % , 81.96 % and decrease of pupal weight with 27.84 % , 14.76 % . The abnormal percentage of pupl stage reached 55.23 % and 32.14 % , while the abnormal percentage of moths stage increased with 41.67 % and 19.04 % . The number of eggs / female reduced by 86.27 % , 79.48 % ,while sterility percentage reached 90.32 % , 82.37 % compared with control . While, treated leaves of castor bean oil with Lc50 and Lc 25 of Bacillus thuringiensis against 2nd instar larvae after feeding 48 hours proved the following : The percentage of mortality 72.41 % and 51.72 % . The larval period increased with 24.74 % , 13.31 % . Increase the pupal period with 38.5 % and 10.80 % . Increase the pre- oviposition period with 237.91 % and 115.16 % . Decrease pupal weight with 21.23 % , 14.60 % - Increase the abnormal percentage of pupa stage with 72.08 % and 26.57 % - Increase the abnormal percentage of moths stage with 70.83 % and 39.60 % - Reduce the number of eggs / female by 92.42 % and 84.79 % . Sterility percentage with 93.80 % , 86.74 % compared with control . Data revealed that Lc50 and Lc25 of Lettuce oil extract after 48 hours of feeding 2nd instar larvae on treated castor bean oil leaves increased the following : The percentage of mortality reached 67.24 % and 62.06 % . The larval period was decreased to 27.34 % , 12.57 % . The pupal period showed an decrease with 33.93 % , 14.91 % - decrease the pre- oviposition period with 57.97 % , 31.59 % - Increase pupal weight with 35.39 % , 30.97 % - Increase the abnormal percentage of pupa stage with 51.25 % , 12.39 % - Reduce the number of eggs / female by 85.93 % , 80.47 % - and didn't effect on moths , hatchability and sterility . compared with control .
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