Residual Control and Lethal Concentrations of GF-120 (spinosad) for Anastrepha spp. (Diptera: Tephritidae)

Abstract

The objective of this study was to determine the relationship between residual time of GF-120 (spinosad) treatment and mortality in three species of Anastrepha Schiner. Concentrations of 96, 72, 48, and 24 ppm were aged on mango leaves under field conditions for 0, 3, 7, 10, 14, 17, and 21 d after application. We found that Anastrepha ludens, A. obliqua, and A. serpentina were highly sensitive to spinosad. The effects of spinosad were not reduced over the 4 d after the initial application, even at a concentration of 24 ppm. Mortality at 14 d after the application of 72 and 96 ppm of spinosad was similar in each of the three fruit fly species. In addition, we found that 24 ppm of spinosad was consumed the most by each species even though no direct relationship between the rate of consumption per female and the dose of the product was observed, in this test, higher consumption of active ingredient was observed at a concentration of 72 ppm, for A. ludens, 48 ppm for A. obliqua, and 96 ppm for A. serpentina. Our results suggest that a spinosad concentration of 72 ppm may effectively control these pests for at least 10 d under field conditions.

Toxicity and residual effects of toxic baits with spinosyns on the South American fruit fly

“…The short spinetoram activity period can be related to the rapid degradation of the insecticide in the presence of light (Gazit et al, 2013) or absorption by the plant, as with the spinosad, making them unavailable to the flies (Yee et al, 2007). In the case of Success 0.02 CB, the formulation contains ingredients that reduce the degradation (Flores et al, 2011), extending the period of effectiveness.…”

Concentration and lethal time of toxic baits based on spinosyns on Ceratitis capitata and Diachasmimorpha longicaudata 1

“…In the field, toxicity and side effects to D. longicaudata may be less damaging to the parasitoid. This possibility is associated with the low biological persistence of toxic baits, when applied under field conditions, as the active ingredient is degraded by the presence of constant rainfall (Revis et al 2004, Flores et al 2011, Harter et al al. 2015).…”

Toxicities and Residual Effects of Toxic Baits Containing Spinosad or Malathion to Control the AdultAnastrepha fraterculus(Diptera: Tephritidae)

“…Flores et al (2011) also reported reduced mortality of A. ludens (Loew), A. obliqua (Macquart) and A. serpentina (Wiedemann) after 7 DAT of the toxic bait GF-120® on mango (Mangifera indica L.) and melon (Cucumis melo L.) leaves. The shorter residual effect of the toxic baits with spinosad may be related to the environmental degradation of this product.…”