Mangoud, A.A.H. 2006 Manipulation of Leptomastix dactylopii and Cryptolaemus montrouzieri for augmentative release for controlling the citrus mealybug (Planococcus citri on citrus under green house conditions. Egyptian Journal of Agricultural Research 84 (3):

Notes: Under green house conditions in Germany, the role of Leptomastk dactylopii Howard (Hymenoptera: Encyrtidae) and C/ypolaemus montrouzieri (Mulsant) (Coleoptera : Coccinellidae) to reduce the population of the citrus mealybug, Planococcus citri (Risso) (Homoptera : Pseudococcidae) on citrus trees were studied during 2001 year. Four plots were used. In the first plot (10 adults and 15 larvael tree) of C montrouzieri were released on 15' June 2001. The percent reduction increased gradually from 0.7 in May (before release) to 74.0 O/O in October. At the same time, fifteen individuals of L. dactylopii were released in the second plot. The results indicated that the percent of parasitism gradually increased from 0.64 O/O (before release) in May to 35.7 O/O in October. In the third plot 10 adults and 15 larvaeltree of C. montrouzieri were released on the first of June 2001 and then L. dactylopii was released (August 2001). The percent reduction.of infestation and percent of parasitism were calculated. After released C. montrouzieri, the percent reduction of P. citri in released plot reached 34.5 %, in August. Followed by release of L. dactylpii in August. Percent of parasitism increased gradually to reach 98.l %.