Fruit fly species of economic importance at the fruit production region of Submedio Sao Francisco-state of art
1999
Mendonca, M. da C. | Carvalho, R. da S. | Haji, F.N.P. | Nascimento, A.S.(Embrapa Mandioca e Fruiticultura, Cruz das Almas (Brazil))
In the Sao Franscisco Vally (Middle Lands) in the Northeast of Brazil we will find the biggest tropical fruit crop production of the country. This region has an irrigating potential of 220,000 ha with mango orchards occupying 8000 ha. Mango production is about 45,000 tons and 48.88 percent of this is exported to USA and Europe. In this region, the fruit fly became the most important insect pest for mango growers because it is a quarantine insect. During the periods of 1989-1993 and 1995-1997 the fly density was monitored in commercial areas with Mc Phail traps. Several spices of economic importance were collected: Anastrepha farterculus, A. obliqua, A. sororcula, and Ceratitis capitata. During 89-93, the density (female/trap/year) of Anastrepha species reached 0.05 with the frequency of 35.4, 12.2, 17.0 percent for A. fraterculus, A. obliqua, and A. sororcula, respectively. In the rural zone, the population of Anastrepha and Ceratitis were 87.7 percent and 1.3 percent, respectively. For the period 95-97, the density of Anastrepha was similar to the previous period. However, the population Ceratitis increased significantly. It is discussed that the high frequency of C. capitata in the urban zone act as a function of host number diversity and cropping extension. Specially, due to the growing area of Barbados cherry (Malpigia emarginata) and Guava (Pisidium guajava).
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