جستجوی مقالات مرتبط با کلیدواژه "chilo suppressalis" در نشریات گروه "گیاهپزشکی"

Increasing insect resistance to the high toxicity of organophosphates and other conventional insecticides highlights the importance of developing and identifying alternative chemicals to successfully manage insect pests, including the striped rice stem borer (SRSB) Chilo suppressalis (Walker). SRSB is one of the most serious pests in paddy fields worldwide, especially in northern Iran. The present study was conducted to determine the efficiency of six insecticides viz., diazinon 10 G (Bazodin) 15 kg/ha; fipronil 0.2 G (Regent) 20 kg/ha; chlorantraniliprole 0.4 G (Ferterra) 12.5 kg/ha; thiamethoxam 25 WG (Actara) 0.2 kg/ha; flubendiamide 20 WG (Takumi) 0.9 kg/ha; dinotefuran 20 SG (Starkle) 0.75 kg/ha against SRSB. The experiments were carried out in randomized complete block design with three replications in experimental paddy fields of Rice Research Institute of Iran, Guilan province, 2018 and 2019. Chlorantraniliprole had the lowest dead heart and whitehead percent and the greatest efficiency against SRSB, followed by flubendiamide and dinotefuran. Our results suggested that chlorantraniliprole, flubendiamide, and dinotefuran can replace diazinon and fipronil in paddy fields. Furthermore, a new equation has been proposed for the calculation efficiency of insecticides based on the SRSB damage percent.

One of the most devastating pests of rice is the lepidopteran insect striped stem borer (SSB) (Chilo suppressalis</em>) (Lepidoptera: Pyralidae). Present investigation was carried out to evaluate the relative efficacy of ecofriendly formulation of Beauveria bassiana ( 1×108 conidia/ml, Diazinon granule 15 kg/ha. and Fipronil granule 20 kg/ha.) for sustainable management of Chilo suppressalis. The fungus Beauveria bassiana is one of natural enemies of the striped stem borer, Chilo suppressalis in the rice fields. During the treatments, precent mortality, infestation of Dead heart and White heads both in vegetative and reproductive stages was observed after spray application at different times intervals i.e., 2 DAT, 7 DAT, 14 DAT and 21 DAT. All the treatments significantly reduced population of Chilo suppressalis larvae compared to control due to their mode of action. It was concluded that maximum mortality (59.29%) and (74.56%) of Chilo suppressalis were achieved with combined application fo B. bassiana both Diazinon insecticide after 21th day of application both fisrt and second generation of insect pest, respectively. In this study, The lowest infestation Dead heart and White heads 0.57 and 1%  observed in treatments Beauveria bassian and Diazinon granular after 21th day, respectively. In this research, the highest infection is created dead hearts and white heads rice was observed in the control treatment 10 and 11.67%. Therfore, the above findings showed the these combinations can be successfully can be used in rice IPM programs for Chilo suppressalis.