Insecticidal effect of thiamethoxam against seven stored-product beetle species. (September 2021)

• Record Type: Journal Article
• Authors: Tsaganou, Fotoula K.; Vassilakos, Thomas N.; Athanassiou, Christos G.
• Is Part Of: Journal of stored products research. Volume 93(2021)
• Publication Date: 2021-09
• Subjects: Thiamethoxam -- Stored-product beetles -- Grain protectants -- Neonicotinoid insecticides; Food -- Storage -- Periodicals; Farm produce -- Storage -- Diseases and injuries -- Periodicals; Entomology -- Periodicals; Food Contamination -- Periodicals; Food Preservation -- Periodicals; Insect Control -- Periodicals; Aliments -- Entreposage -- Périodiques; Produits agricoles -- Entreposage -- Maladies et dommages -- Périodiques; Electronic journals; 631.568
• DOI: 10.1016/j.jspr.2021.101843
• Languages: English
• ISSNs: 0022-474X

Abstract

Abstract: Bioassays were carried out in order to assess the insecticidal value of the neonicotinoid thiamethoxam in different concentrations against seven important beetle species that are major pests of stored grains. These species were Prostephanus truncatus (Horn), Rhyzopertha dominica (F.), Sitophilus oryzae (L.), Sitophilus granarius (L.), Oryzaephilus surinamensis (L.), Tribolium confusum Jacquelin du Val, and Cryptolestes ferrugineus (Stephens). Adults of these species were exposed to grains treated with thiamethoxam at dose rates of 0 (control), 0.01, 0.1, 0.5, 1, 2, 5 or 10 ppm. Our results indicate that with the increase of the insecticide concentration, there was also an increased adult mortality and a reduction in progeny production. To illustrate the relative sensitivity to thiamethoxam of the seven insects, starting with the most susceptible, we can classify them as P. truncatus > R. dominica = S. granarius = S. oryzae > T. confusum = O. surinamensis > C. ferrugineus. The findings of the present research show that thiamethoxam can be recommended for its efficacy at a rate of 10 ppm and duration of 14 days that could be used to control all insects and their progeny. Highlights: Thiamethoxam was found to be effective as a grain protectant for the control of a wide range of stored product beetle species Prostephanus truncatus and Rhyzopertha dominica were the most susceptible beetle species to thiamethoxam Thiamethoxam was effective at concentrations that are comparable with those of traditional grain protectants