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摘要
Between February 2004 and February 2010, 148 growers of tomato, cucurbits (melon and watermelon), green onion and guava, in 14 of the 23 states of Venezuela were interviewed to gather information about identification and management practices of their main phytosanitary problems. When insecticides were mentioned, the growers were asked to specify the products and their corresponding application frequencies. Insecticide based management was indicated by 92,9% of the growers, with averages of 2.5, 2.6, 1.1 and 0.5 weekly applications, respectively, for the four crops mentioned above. The most relevant entomological problems reported were Liriomyza spp. on green onion, tomato and cucurbits, and Bemisia tabaci, an important virus vector, on tomato and cucurbits; also on tomato, Neoleucinodes elegantalis, Heliothis spp. and Gelechiidae miners were cited as relevant, as were Capulinia sp. and Selenothrips rubrocinthus on guava. Insecticides represented similar to 50% of direct production costs. According to 55% of the growers, technical assistance was provided by agrochemical companies. Given the impact of insecticides on the ecological dynamic of crops and the general environment, as well as on the health of agricultural workers and consumers, these results demand more attention to the management of entomological problems in the agriculture in Venezuela.
- 出版日期2011-3
