Milbemectin and etoxazol acaricide resistant and susceptible strains of Tetranychus urticae (Trombidiformes: Tetranychidae) are equally radiosusceptible and unable to reproduce when irradiated with 400 Gy
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Florida Entomologist
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The twospotted spider mite, Tetranychus urticae Koch (Trombidiformes: Tetranychidae), is considered one of the most important phytophagous mites
causing considerable damage in several agricultural crops. The aim of this study was to evaluate the susceptibility to gamma irradiation of strains
of T. urticae resistant (R) and susceptible (S) to the acaricides, milbemectin and etoxazol. The R and S strains for milbemectin and etoxazol were irradiated
with 200 and 400 Gy of gamma radiation in a Gammacell 220 source to evaluate the effects of gamma radiation on the growth rate of the
mites. A dose of 400 Gy totally eliminated populations of both R and S strains of T. urticae within 10 d. A dose of 200 Gy was not sufficient to totally
eliminate both T. urticae strains, but it significantly reduced egg viability of both strains. In the most likely measure of efficacy for phytosanitary irradiation
of mites—i.e., prevention of F1 egg hatch when parent adults are irradiated—no differences were found in response to irradiation among
the 4 strains.
Como referenciar
ARTHUR, VALTER; NICASTRO, ROBERTO L.; SATO, MARIO E.; MACHI, ANDRE R. Milbemectin and etoxazol acaricide resistant and susceptible strains of Tetranychus urticae (Trombidiformes: Tetranychidae) are equally radiosusceptible and unable to reproduce when irradiated with 400 Gy. Florida Entomologist, v. 99, p. 34-37, 2016. special issue 2. Disponível em: http://repositorio.ipen.br/handle/123456789/27211. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.