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RESEARCH PRODUCT

RESUME:Studies on the Chemical Control of Aonidiella aurantii (Mask.)

subject

description

Aonidiella aurantii (Mask.) which was accidentally introduced in Sicily in 1968 has since become a dangerous pest requesting special treatments in citrus groves. Experiments have been carried out on Citrus lemon to evaluate the efficacy of several organophosphorous compounds partly in mixture with white oil and this latter applied sole (cf. table 1). The results obtained against young females are set out in table 2; they show excellent results with almost all compounds whereas the same pesticides had a rather poor effect on mature females (cf. table 3). It is concluded that the replacement of white oils by organophosphorous compounds is not justified providing that the control is directed against larvae and young females. This means that a proper timing is essential to obtain a satisfactory mortality, thus avoiding the use of detrimental broad acting pesticides.