Cayenne oil, Capsicum annuum L. with Gamma-Ray for Enhancing Bacillus thuringiensis (Kurs.) Efficacy to Pectinophora gossypiella (Saund.) Control

Document Type : Original Article

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Plant Protection Research Institute, Agriculture Research Center, Dokki, Giza, Egypt

Abstract

 Cayenne oil (Capsicum annuum L.) was exposed to gamma doses of 45, 90 & 180 Gy for bioassay, biological and life table assays of Pectinophora gossypiella (Saund.) treated as newly hatched larvae. Also, cayenne oil singly or exposed to gamma doses was combined with B. thuringiensis for efficacy enhancing purposes against the newly hatched larvae and 1-day old egg of P. gossypiella.
           GC-MS analysis observed three major components percent that was increased with increasing gamma doses exposed (Cayenne oil+ 180 Gy, cayenne oil + 90 Gy, cayenne oil + 45 Gy and cayenne oil singly). The compounds were 9-octadecenoic acid (z)-, methyl ester; 9,12 octadecadienoyl chloride, (z, z) and Hexadecanoic acid methyl ester.
           Cayenne oil + 180 Gy was the best treatment effect on the major tested assays; bioassay, biological and life table of P. gossypiella treated as newly hatched larvae. Also, the same compound can enhance B. thuringiensis efficacy against the newly hatched larvae and egg mortality percent.

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