Pesquisa Agropecuária Brasileira (2012) 47, 1673-1680

Ana Paula Ferreira Pinto, Antonio Batista Filho, José Eduardo Marcondes de Almeida and Inajá Marchizeli Wenzel (2012)
Patogenicidade de Beauveria bassiana ao psilídeo Diaphorina citri e compatibilidade do fungo com produtos fitossanitários
[Beauveria bassiana pathogenicity to Diaphorina citri and compatibility of the fungus with phytosanitary products]
Pesquisa Agropecuária Brasileira 47 (12), 1673-1680
Abstract: The objective of this work was to evaluate the pathogenicity of Beauveria bassiana to Diaphorina citri (Hemiptera: Psyllidae) nymphs, and to check the compatibility of the fungus with phytosanitary products, and its persistence in citrus plants. Nymphs of D. citri were sprayed with B. bassiana in the concentrations 5x10⁶, 1x10⁷, 5x10⁷, 1x10⁸, 5x10⁸ and 1x10⁹ conidia mL^-1 for lethal concentration determination. In order to evaluate the compatibility of the phytosanitary products with the fungus, neem extract and five insecticides of four different chemical groups were individually added to PDA culture medium, in which the fungus was cultivated. Vegetative growth, sporulation and viability of the entomopathogen were evaluated. In the greenhouse, citrus plants were first treated with the phytosanitary products and, then, with the pathogen. Exposure times of 24 hours, 7 and 14 days were evaluated. Fungus pathogenicity to D. citri nymphs was confirmed; LC50 of 0.4 x10⁷ and LC90 of 6.7 x10⁷ conidia mL^-1 were determined at the tenth day of evaluation. In the laboratory, the phytosanitary products reduced fungus growth. In greenhouse, the products did not affect fungus survival on citrus plants.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
resistance to pesticides
evaluation - screening - selection

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Diaphorina citri	Citrus (genus)
Beauveria bassiana (entomopathogen)	Diaphorina citri	Citrus (genus)