Field and laboratory evaluation of a new insect growth inhibitor lufenuron against cotton leaf worm Spodoptera littoralis (Boisd.) in relation to its antiphenol oxidase activity | ||
| Journal of Pest Control and Environmental Sciences | ||
| Volume 6, Issue 2, December 1998, Pages 13-23 PDF (661.9 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpces.1998.461513 | ||
| Author | ||
| Abd El-Salam E. M. El-Sorady* | ||
| Elay El-Baroud Agric. Res. Station, Plant Protection Inst. Agric. Res. Center | ||
| Abstract | ||
| Field and laboratory experiments were carried out at Etay El- Baroud region, Behera Governorate during the cotton season 1997 and Agriculture Research Station Farm during season 1998 to evaluate the efficiency of Lufenuron (Match); a new insect growth inhibitor. Field and laboratory toxicity data showed that Lufenuron had a high initial deposit with low initial reduction in insect counts. Population increased after 5 or 7 days post treatments up to 98%. Also toxicity data revealed that dipping method using 1/8 field concentration resulted in more initial effect than that of spray with field concentration. Data of enzymatic studies indicated that phenol oxidase activity was high in 4 instar larvae and decreased with larval development. Data also indicated that phenol oxidase activity was highly affected especially at the moulting time even though the absolute activity was low. Data suggested that phenol oxidase is not the sole site of action. However, Lufenuron overall target mechanism resulted in death of the treated larvae. | ||
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