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Toxicity of neonicotinoids to Ceratitis capitata and Anastrepha fraterculus (Diptera: Tephritidae)

100%

Raga A., Sato M. E.

Journal of Plant Protection Research

2011

tom 51

nr 4

The effects of imidacloprid and thiamethoxam against Ceratitis capitata (Wiedemann) and Anastrepha fraterculus (Wiedemann) adults were evaluated under broadcast spray and toxic bait systems in the laboratory. In general, when C. capitata and A. fraterculus were sprayed with insecticides, the time required for killing them was inversely proportional to the neonicotinoid concentrations. By cover spray, females and males of A. fraterculus were more susceptible to imidacloprid and thiamethoxam than C. capitata, presenting significantly lower LT50. In the case of imidacloprid bait, no differences at LT50 were detected between females or males of both fruit flies or between sexes of respective fruit fly species. In general, C. capitata and A. fraterculus adults died in all the toxic baits up to 7 days after application on citrus leaves in the field. The data emphasize the viability of the use of neonicotinoids for the control of fruit flies.

Efect of fungicides on the mite fauna of Prunus persica L. cultivars in Presidente Prudente, SP, Brazil

71%

Montes S. M. N. M., Raga A., Boliani A. C., Mineiro J. L., Santos P. C.

Journal of Plant Protection Research

2011

tom 51

nr 3

The objective of this study was to characterize the diversity of phytophagous and predatory mites on peach cultivars either with or without fungicide treatment, in the city of Presidente Prudente, State of São Paulo, Brazil. In order to evaluate the effect of fungicides, leaf samples were colleted at random from treated and untreated plants of the Tropical, Aurora 1 and Aurora 2 cultivars, from June 2004 to February 2006. From the results obtained it can be concluded that: plants with or without treatment showed high populations of predatory mites, indicating that the treatments were innocuous on the mite populations. A diversified composition of the mite community was observed. The Phytoseiidae family had the highest richness in numbers and species of mites. Euseius citrifolius and E. concordis were the most abundant species. Plants with or without treatment had high abundances of predatory mites, with a predominance of E. citrifolius.

Ograniczanie wyników

2 Journal of Plant Protection Research

2 Raga A.

1 Boliani A. C.

1 Mineiro J. L.

1 Montes S. M. N. M.

1 Santos P. C.

1 Sato M. E.

2 2011

Wyniki wyszukiwania

Toxicity of neonicotinoids to Ceratitis capitata and Anastrepha fraterculus (Diptera: Tephritidae)

Efect of fungicides on the mite fauna of Prunus persica L. cultivars in Presidente Prudente, SP, Brazil