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Bulletin of the National Research Centre. 2006; 31 (2): 147-157
en Inglés | IMEMR | ID: emr-76376

RESUMEN

Filed experiments were carried out to investigate the effect of some mineral oils for controlling Russellaspis pustulans on apple trees at El-Nobaryia. Three summer oils [KZ, Super Royal and Chemi oil] at the rate of 1.5% and two winter oils [Folck and Alboleum] at the rate of 2 and 2.5% were used. The obtained results showed that, all tested mineral oils were able to decrease the percent of infestation of Fig scale insect on apple trees throughout the three post treatment counts until the end of winter spraying experiments. Analysis of data showed clearly highly significant differences between the miscible oils efficacy [over 92%] and the winter oils [over 88%]. data also, revealed highly significant response to the tested oils in both types in case of 7. pustulans nymphal stage, adult females laying eggs then adult females, where reduction pencentage was 89.1, 89.9 and 87.6 after 8 weeks from winter spraying of the first season, respectively. However, the low effect on the adult females to the tested treatments was due to that this insect overwinter as a nongravid female, and the stickier of this stage to the host plant. The local mineral oils can use in IPM programs on the deciduous trees against scale insects


Asunto(s)
Femenino , Insectos , Control de Insectos , Aceites de Plantas , Malus , Estaciones del Año
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