Pathogenic Fungi of planthoppers associated with rice crops in Argentina

TOLEDO, A.V., GIAMBELLUCA, L., MARINO DE REMES LENICOV , A. AND LÓPEZ LASTRA, C.C.

INTERNATIONAL JOURNAL OF PEST MANAGEMENT

TAYLOR & FRANCIS LTD

Año: 2008 vol. 54 p. 363 - 368

0967-0874

We conducted a survey of pathogenic fungi of planthoppers associated with rice crops in Los Hornos, Buenos Aires, Argentina, and a study of the seasonality and prevalence of these pathogens. Samples were taken in rice for two consecutive years. The plants sampled included rice Oryza sativa L. (Poaceae) and its surrounding weeds. The planthopper Oliarus dimidiatus Berg. (Hemiptera: Fulgoromorpha: Cixiidae) was the most abundant species associated with rice. Two species of entomophthoralean and one species of hypocrealean fungi infected and killed adults of O. dimidiatus in the rice agroecosystem. The fungi were identified as: Pandora sp. (Entomophthorales: Entomophthoraceae), Conidiobolus coronatus (Costantin) Batko (Entomophthorales: Ancylistaceae), andOryza sativa L. (Poaceae) and its surrounding weeds. The planthopper Oliarus dimidiatus Berg. (Hemiptera: Fulgoromorpha: Cixiidae) was the most abundant species associated with rice. Two species of entomophthoralean and one species of hypocrealean fungi infected and killed adults of O. dimidiatus in the rice agroecosystem. The fungi were identified as: Pandora sp. (Entomophthorales: Entomophthoraceae), Conidiobolus coronatus (Costantin) Batko (Entomophthorales: Ancylistaceae), andOliarus dimidiatus Berg. (Hemiptera: Fulgoromorpha: Cixiidae) was the most abundant species associated with rice. Two species of entomophthoralean and one species of hypocrealean fungi infected and killed adults of O. dimidiatus in the rice agroecosystem. The fungi were identified as: Pandora sp. (Entomophthorales: Entomophthoraceae), Conidiobolus coronatus (Costantin) Batko (Entomophthorales: Ancylistaceae), andO. dimidiatus in the rice agroecosystem. The fungi were identified as: Pandora sp. (Entomophthorales: Entomophthoraceae), Conidiobolus coronatus (Costantin) Batko (Entomophthorales: Ancylistaceae), andConidiobolus coronatus (Costantin) Batko (Entomophthorales: Ancylistaceae), and Beauveria bassiana (Balsamo-Crivelli) Vuillemin (Hypocreales: Clavicipitaceae). Pandora sp. was the most predominant pathogen collected. It was recorded from the middle of February to the middle of April 2005, and not found again until the end of March 2006. The report of Pandora sp., C. coronatus and B. bassiana represents the first records of these fungi as pathogens of hoppers associated with rice crops in Argentina.(Balsamo-Crivelli) Vuillemin (Hypocreales: Clavicipitaceae). Pandora sp. was the most predominant pathogen collected. It was recorded from the middle of February to the middle of April 2005, and not found again until the end of March 2006. The report of Pandora sp., C. coronatus and B. bassiana represents the first records of these fungi as pathogens of hoppers associated with rice crops in Argentina.Pandora sp., C. coronatus and B. bassiana represents the first records of these fungi as pathogens of hoppers associated with rice crops in Argentina.