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Dispersal speed of datylopius opuntiae on giant cactus pear (opuntia fícus- indica)

Author(s): Edson Batista Lopes | Ivanildo Cavalcanti de Albuquerque | Carlos Henrique de Brito | Jacinto de Luna Batista

Journal: Engenharia Ambiental : Pesquisa e Tecnologia
ISSN 1678-2178

Volume: 6;
Issue: 2;
Start page: 664;
Date: 2009;
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Keywords: Forage cactus pear | Livestock | Carmine cochineal | Insect | Pest.

The insect Dactylopius opuntiae (cochineal carmine) has become an important pest to giant cactus pear (Opuntia ficus-indica) in several counties of the micro regions of Carirí Ocidental, Serra do Teixeira and Piancó, where the attack of the insect is so intense that it obliges farmers to eradicate crops. This research aimed to quantify the dispersal speed of D. opuntiae under field conditions, as a premise for the implementation of tactics of the Integrated Pest Management (IPM). The experiment was carried out at the Lagoa Seca Experimental Station, in Lagoa Seca County, state of Paraiba. Dispersion quantification was conducted in three rows of giant cactus pear each with ten plants, the first being selected to perform the artificial infestation (initial). Three evaluations was carried out in three rows and counted the average number of colonies arising from the initial infestation. Medium comparison of was made by Tukey test at 5% probability, using the application ASSISTAT 7.5 Beta. For the aspect of dispersion within each plant, it was observed that the artificially infested cladodes began to be colonized for 8 days after infection and subsequently at 15, 21, 28, 35 and 42 and 50 days, noting that equally the first, second and third rows were also colonized, showing thus the dispersal speed of the insect pest.
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