MANIPULATION OF LEPTOMASTIX DACTYLOPL T AND CRYPTOLAEMUS MONTROUZIERI FOR AUGMENTATIVE RELEASE FOR CONTROLLING THE CITRUS MEALYBUG PLANOCOCCUS CITRION CITRUS UNDER GREEN HOUSE CONDITIONS | ||
| Egyptian Journal of Agricultural Research | ||
| Article 13, Volume 84, Issue 3, September 2006, Pages 803-813 PDF (2.48 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.2006.231484 | ||
| Author | ||
| ASHRAF A. H. MANGOUD | ||
| Plant Protection Research Institute, Agricultural Research Center, Giza, Egypt | ||
| Abstract | ||
| Under green house conditions in Germany, the role of .Leptomastix dactylopii Howard (Hymenoptera: Encyrtidae) and Ctyptothemus montrouzieri (Mulsant) (Coleoptera : Coccinellidae) to reduce the population of the citrus mealybug, Manococcus cirri (Risso) (Homoptera : Pseudocooddae) on citrus trees were studied during 2001 year. Four plots were used. In the first plot (10 adults and 15 larvae/ tree) of C. montrouzieri were released on 1m June 2001. The percent reduction increased gradually from 0.7 in May (before release) to 74.0 % in October. At the same time, fifteen individuals of L. daayfopii were released in the second plot. The results indicated that the percent of parasitism gradually increased from 0.64 % (before release) in May to 35.7 % in October. In the third plot 10 adults and 15 larvae/tree of C montrouzieri were released on the first of June 2001 and then L. daay/opii was released (August 2001). The percent reduction,of infestation and percent of parasitism were calculated. After released C montrouzieri, the percent reduction of P. cirri in released plot reached 34.5 %, in August. Followed by release of L. dacty/opll in August. Percent of parasitism increased gradually to reach 98.1%. | ||
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