Ibrahim,, E. (2007). EFFECT OF SOME INSECTICIDES ON THE COTTON LEAF WORM Spodoptera littoralis (Boisd.) AND ITS ASSOCIATED PREDATOR (Coccinella septempunctata L ) ON TOMATO PLANTS. Journal of Plant Protection and Pathology, 32(4), 3105-3111. doi: 10.21608/jppp.2007.219499
Evleen G. Ibrahim,. "EFFECT OF SOME INSECTICIDES ON THE COTTON LEAF WORM Spodoptera littoralis (Boisd.) AND ITS ASSOCIATED PREDATOR (Coccinella septempunctata L ) ON TOMATO PLANTS". Journal of Plant Protection and Pathology, 32, 4, 2007, 3105-3111. doi: 10.21608/jppp.2007.219499
Ibrahim,, E. (2007). 'EFFECT OF SOME INSECTICIDES ON THE COTTON LEAF WORM Spodoptera littoralis (Boisd.) AND ITS ASSOCIATED PREDATOR (Coccinella septempunctata L ) ON TOMATO PLANTS', Journal of Plant Protection and Pathology, 32(4), pp. 3105-3111. doi: 10.21608/jppp.2007.219499
Ibrahim,, E. EFFECT OF SOME INSECTICIDES ON THE COTTON LEAF WORM Spodoptera littoralis (Boisd.) AND ITS ASSOCIATED PREDATOR (Coccinella septempunctata L ) ON TOMATO PLANTS. Journal of Plant Protection and Pathology, 2007; 32(4): 3105-3111. doi: 10.21608/jppp.2007.219499
EFFECT OF SOME INSECTICIDES ON THE COTTON LEAF WORM Spodoptera littoralis (Boisd.) AND ITS ASSOCIATED PREDATOR (Coccinella septempunctata L ) ON TOMATO PLANTS
Plant Protection Research Institute, Agricultural Research Center, Sabahia, Alexandria
Abstract
In 2005 and 2006 tomato season, two experiments were conducted to study the effect of using five insecticides applied on cotton leaf-worm Spodoptera littoralis (Boisd) and its predator Coccinella septempunctata L.in tomato fields. Five pesticides Profenofos (Celeian 72%Ec), Diflubenzaron (Diflurait 25%WP), Methomyl (Mitholait 20%SL), Chlorpyriphos-methyl (Birodan 50%EC) and Fentrothyon (Adoya Fentro 50% EC) were tested. Weekly counts of numbers second and fourth instar larvae on cotton leaf-worm and its predator were conducted in each plot. Results showed that during season 2005 the insecticide mitholait was the most potent chemical on the fourth instar larvae (85.5%R), but it was the least on the second instar larvae (60.7%R).
Diflurait gave highly reduction on the second instar larvae (78.9%R). During season 2006, the results showed also, the insecticide mitholait was still the most effective one on the fourth instar larvae (78.8% R) and the least effective one on the second instar larvae (70.6% R), while the insecticide celeian gave the high effect on the second instar larvae (80.2% R). During two seasons, the insecticide diflurait was the least effective one and did not detrimental effects on the predator (70.9 and 71.4% R) respectively. This proves that combination of mitholait plus the diflurait may fit well into IPM programs.
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