Avaliação de variedades híbridos interespecíficos e espécies silvestres de Manihot como fonte de resistência ao ácaro verde Mononychellus tanajoa (Bondar, 1938) (Acari , Tetranychidae)

Abstract

This study aimed to assess by biological studies in laboratory from Entomology Embrapa Cassava & Fruits and field evaluations, tolerance and / or resistance of wild species and hybrids of Manihot M. tanajoa green mite. To evaluate the biological aspects of the cassava green mite in wild species of Manihot, was evaluated under laboratory accesses the following nine species: M. esculenta ssp. flabellifolia, M. peruviana e M. carthaginensis ssp. glaziovii, two varieties of M. esculenta: Cigana Preta and Sacaí. For field verification in the Experimental Federal University of Bahia Recôncavo of interspecific hybrids of Manihot and cassava varieties for resistance to the cassava green mite, were evaluated using the following rating scale varieties BRS Amansa Burro, BRS Mestiça, BRS Tianguá, BRS Jarina, BRS Tapioqueira, BRS Caipira, BRS Verdinha, BRS Formosa, BRS Poti Branca, BRS Kirirís, BRS Guaíra, BRS Mani Branca, hybrids 98150-06, 9624-09, 9975-01, 96207-05, 97150-01, 9783-13, 200235-07, and accesses the Germplasm Bank, Sangão, Cidade Rica, Cigana Preta, Izabel de Souza and Platina. Regarding biological mite, we observed the presence of genetic variability among wild and domesticated species of Manihot for resistance to M. tanajoa, and that an access species M. carthaginensis ssp. glaziovii was less favorable to the development of the mite. In the field evaluation, we identified, differentiating levels of damage to M. tanajoa, demonstrating a genetic variability allowing select plants resistant to the mite.