EFFECTIVENESS OF Pauesia juniperorum IN CONTROLLING POPULATION OF CYPRESS APHIDS IN MALAWI .......

Cinara cupressivora, a cypress aphid, is a major Cupressaceae pest that has wreaked havoc on both naturally renewing and planted forests in Africa, Europe, Latin America, the Caribbean, and the Near East. The purpose of this study was to examine how successful Pauesia juniperorum was at controlling Cypress Aphids (Cinara cupressivora) in a Cupressus lusitanica clonal seed orchard in Dedza, Malawi. The information was taken from Malawi's Forestry Research Institute's monthly reports from 1994 to 2002. The presence of P. juniperorum and C. Cupressivora were shown to have a statistically significant (X2=57.62, P0.001) relationship. In the presence of P. juniperorum, a drop in the percentage presence of C. cupressivora was 23 times (Odds ratio = 22.9) more frequent than in the absence. There was also a statistically significant (X2=3573.06, P0.001) link between the presence of P. juniperorum and C. lusitanica damage, according to the study. In the presence of P. juniperorum, the damage to C. lusitanica was 65 times (odds ratio 65.3) more likely to be reduced than in the absence. The mean number of cypress aphids per tree branch per month before (5.560.75) and after (2.690.51) the discharge of P. juniperorum was likewise significantly different (P0.001). As a result, the study demonstrates P. juniperorum's efficacy as a long-term biological control agent for Cypress Aphids.

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