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Borges L.R.,Instituto Agronomico Of Pernambuco Ipaa | Santos D.C.,Instituto Agronomico Of Pernambuco Ipaa | Cavalcanti V.A.L.B.,Instituto Agronomico Of Pernambuco Ipaa | Gomes E.W.F.,Instituto Agronomico Of Pernambuco Ipaa | And 2 more authors.
Acta Horticulturae | Year: 2013

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. Source


Borges L.R.,Instituto Agronomico Of Pernambuco Ipaa | Santos D.C.,Instituto Agronomico Of Pernambuco Ipaa | Gomes E.W.F.,Instituto Agronomico Of Pernambuco Ipaa | Cavalcanti V.A.L.B.,Instituto Agronomico Of Pernambuco Ipaa | And 3 more authors.
Acta Horticulturae | Year: 2013

In the semi-arid region of the state of Pernambuco, Brazil, prickly-pear is the main source of livelihood of thousands of families that depend on this crop to feed their cattle, goats and sheep, especially in times of drought. The main factor limiting the productivity of prickly-pear is the insect Dactylopius opuntiae, popularly known as carmine cochineal, reported as a pest of great importance, being spread over several states in northeastern Brazil. The use of alternative products, in place of chemical insecticides, has been performed in several studies because of the low toxicity to humans and the environment. In this study, conducted in a greenhouse at one of the experimental stations of Pernambuco Agronomic Institute-IPA, were tested three neutral detergent concentrations, cassava starch, liquid waste generated in the pressing process of cassava, mineral oil and neen for control of carmine cochineal. All evaluations were performed using a grade scale ranging from 0 (without damage) to 4 (more than 75% of pads infested). The results of this experiment showed that neen was the most efficient treatment, followed by neutral detergent and mineral oil. Source

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