SELECTION OF CACTUS PEAR CLONES REGARDING RESISTANCE TO CARMINE COCHINEAL DACTYLOPIUS OPUNTIAE (DACTYLOPIIDAE)
The resistance of prickly-pear clones to carmine cochineal Dactylopius opuntiae was evaluated. The experimental design was randomized with 11 treatments: Clone-20, Gigante, Redonda, F-8, F-24, F-21, Orelha de Elefante Africana, Miúda, IPA-Sertânia, Orelha de Elefante Mexicana and Orelha de Onça, and six repetitions. The parameters studied were fixing of colonies on cladodes and the infestation rate. Evaluations were performed at intervals of 10, 20, 30, 40 and 45 days, using a grade scale ranging from 0 (without damage) to 4 (more than 75% of pads infested). Results showed that clones Miúda, IPA-Sertânia, Orelha de Elefante Mexicana, Orelha de Elefante Africana and Orelha de Onça proved to be immune to the cochineal, since there has been no pest establishment. Clones that showed the greatest damage was Clone-20, considered highly susceptible; and Gigante and Redonda moderately susceptible.
Borges, L.R., Santos, D.C., Cavalcanti, V.A.L.B., Gomes, E.W.F., Falcão, H.M. and da Silva, D.M.P. (2013). SELECTION OF CACTUS PEAR CLONES REGARDING RESISTANCE TO CARMINE COCHINEAL DACTYLOPIUS OPUNTIAE (DACTYLOPIIDAE). Acta Hortic. 995, 359-365
pest, susceptibility, resistance, Opuntia, Nopalea