Evaluation of thiamethoxam 25 per cent WG against major insect pests of rice (Oryza sativa L.)

Panse, Raju; Bhandarkar, A.P.; Rajak, S. K.

doi:10.15740/has/ijpp/9.2/551-555

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2022

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“…Similar results were confirmed in the field experiment II conducted during rabi 2019-2020, with the least incidence being with thiamethoxam followed by that of garlic and chilli extract. These results are in conformity with those of Panse et al (2016) who reported that thiamethoxam 25WG @ 50g a.i./ ha recorded less deadhearts. Rani (2013) reported that garlic and chilli extract at 5 and 10% did not allow the entry of stem borer larvae in rice stalks up to 6 and after 36 hr of release with a maximum antifeedant efficacy.…”

Section: Resultssupporting

confidence: 93%

Efficacy of Botanical Extracts Against Rice Stem Borer <i>Scirpophaga Incertulas</i> (Walker)

Nishanthini

Kandibane²

2022

ije

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Efficacy of botanical extracts was evaluated against the rice stem borer Scirpophaga incertulas (Wlk.) at PAJANCOA and RI, Karaikal during kharif 2019 and rabi 2019-2020. The results revealed that thiamethoxam 25WG @ 100 g/ ha reduced incidence to 4.99% and 4.13% (52.15 and 61.80% reduction, respectively). Among the botanicals, garlic and chilli extract 5% reduced this to 5.69% and 5.48%. The predatory coccinellids and spiders were more in untreated check and it was found at par with garlic and chilli extracts at 5%, followed by five leaf extracts @10% and bitter apple leaf extract 10%. The benefit cost ratio (BCR) was maximum with thiamethoxam 25WG @ 100 g/ ha (1: 1.67 and 1: 2.10), followed by garlic and chilli extract 5% (1: 1.59 and 1:1.91).

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Section: Resultssupporting

confidence: 93%