Abstract
The efficacy of 3 petroleum spray oils and abamectin plus oil for the control of the citrus leafminer Phyllocnistis citrella Stainton were compared with conventional broad-spectrum pesticides, cartap and methomyl, in a commercial orange orchard in southern China. No differences were found among the 3 oils in the number of mines per leaf sampled 4 d after the application of 3 sprays at an interval of 6-7 d. A narrow-range oil applied at a rate of 500 ml/100 liters of water provided control of leafminer equivalent to cartap and methomyl. Abamectin plus petroleum spray oil at a rate of 1.5 g (AI) plus 500 ml/100 liters of water, respectively, provided complete control of leafminer. The dose response of citrus leafminer to narrow-range petroleum spray oil, water emulsion indicated that concentrations >0.5% oil provided little additional protection. No phytotoxicity was observed with any of the oil treatments. Results are discussed in terms of a sustainable, integrated pest management system.
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