Abstract

FORERO-PATINO, Jennifer J.; ARGUELLES, Zulma P.; CANTOR R., Fernando  and  RODRIGUEZ, Daniel. Bioassay for evaluating the compatibility of adults of Neoseiulus californicus (Parasitiformes: Phytoseiidae) with some commercial use pesticides under semicontrolled conditions. Agron. colomb. [online]. 2010, vol.28, n.2, pp.273-280. ISSN 0120-9965.

Neoseiulus californicus is a predator of Tetranychus urticae in commercial rose crops, which, however, receive agrochemical applications that prevent the use of the insect as a biological controller. Given the need to define the chemical agents that can be used in phytosanitary controls without affecting the predator, the present research study sought to define a methodology to determine the compatibility of a series of agrochemicals with the adults of N. californicus. For this purpose, we established both the application mode of the products and the spraying methods (direct application and treated surface); the adequate substrate plant species for the bioassay; and the compatibility of the chemical products with the predator. The substrate plant was observed to be the rose, sprayed at a 1 m distance in three applications of the product. No significant differences were detected between the two spraying methods (P = 0.15222). While methomyl (0.5 g L^-1) was found not to be compatible with A. californicus, prochloraz (0.6 cm³ L^-1), bupirimate (1.0 g L^-1) and bifenazate (0.3 g L^-1) did show such compatibility (mean mortality±SE: 17±3%), and are therefore recommended to be used together with the predator in the management of this crop.

Keywords : ornamental cultivation; pesticide spraying; predator mites; integrated pest management.

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