Dwarf cashew antibiotic and antixenotic resistance to the whitefly Aleurodicus cocois

• Published in: Anais da Academia Brasileira de Ciências Vol. 92; no. suppl 1; p. e20180663
• Main Authors: GOIANA, ELAINE S.S., DIAS-PINI, NIVIA S., VIDAL-NETO, FRANCISCO C., GOMES FILHO, ANTÔNIO A., SILVA, CHERRE S. BEZERRA DA, SARAIVA, WENNER V.A.
• Format: Journal Article
• Language: English
• Published: Academia Brasileira de Ciências 01-01-2020
• Subjects: Anacardium occidentale; attractiveness; cashew whitefly; host plant resistance; MULTIDISCIPLINARY SCIENCES; oviposition; attractiveness; host plant resistance; cashew whitefly; oviposition; Anacardium occidentale
• ISSN: 0001-3765; 1678-2690; 1678-2690
• DOI: 10.1590/0001-3765202020180663

Abstract The aim of the present study was to identify Aleurodicus cocois resistant genotypes among five dwarf cashew clones available in the germplasm bank of Embrapa/Centro Nacional de Pesquisa Agroindústria Tropical. Free-choice and no-choice tests were applied in order to evaluate the relative attractiveness of the clones and the oviposition preferences, egg-to-adult development times and adult emergence rates of the pest. In comparison with other clones, PRO143/7 exhibited the lowest attraction to the whitefly and was least preferred for oviposition in the free-choice test. Conversely, CCP76 attracted the highest number of A. cocois and was preferred for oviposition. In the no-choice test, the rates of emergence of adults from clones BRS274, CCP76 and PRO143/7 varied between 53.0 and 56.8%, values that were significantly lower (p < 0.05) than those of clones BRS226 and EMBRAPA51, which were 72.34 and 75.16%, respectively. Some of the cashew clones tested showed antibiotic (CCP76, PRO143/7 and BRS274) and antixenotic (PRO143/7 and BRS226) resistance to A. cocois. These clones are good candidates for use in breeding programs of cashew.