Efficacy of spinetoram and flupyradifurone against bruchid on blackgram (Vigna mungo) under storage conditions

AKSHATA  NELAGUNDA; SIDDARAJU R; PARASHIVA  MURTHY; MANJANAIK  C; KRISHNA  T V; JYOTHI  B L; RAMGOPAL  MOPURI

doi:10.56093/ijas.v94i2.137493

Authors

AKSHATA NELAGUNDA University of Agricultural Sciences, Bengaluru, Karnataka 560 065, India
SIDDARAJU R University of Agricultural Sciences, Bengaluru, Karnataka 560 065, India
PARASHIVA MURTHY University of Agricultural Sciences, Bengaluru, Karnataka 560 065, India
MANJANAIK C University of Agricultural Sciences, Bengaluru, Karnataka
KRISHNA T V University of Agricultural Sciences, Bengaluru, Karnataka 560 065, India
JYOTHI B L University of Agricultural Sciences, Bengaluru, Karnataka 560 065, India
RAMGOPAL MOPURI University of Agricultural Sciences, Bengaluru, Karnataka 560 065, India

https://doi.org/10.56093/ijas.v94i2.137493

Keywords:

Blackgram, Bruchid, Flupyradifurone, Spinetoram

Abstract

The effectiveness of various molecules, including spinetoram 11.7 sc and flupyradifurone 200 sl, along with chemical checks like emamectin benzoate 5 sg and deltamethrin 2.8 ec, was investigated for controlling bruchid infestation and preserving seed quality during ambient storage at University of Agricultural Sciences, Bengaluru, Karnataka (2021–22). After 9 months, spinetoram 11.7 sc at 25.6 mg/kg seeds (T₃) demonstrated outstanding results compared to the control (T₉). Treatment T₃ exhibited the highest 100-seed weight (5.28 g), lowest seed moisture (9.64%), and the highest germination rate (82%). Additionally, treatment T₃ showed maximum shoot length, root length, mean seedling length, and mean seedling dry weight. The electrical conductivity (EC) of seed leachate was significantly lower in T₃ (834 µS/cm) treatment, highlighting its superiority. Spinetoram 11.7 sc also excelled in dehydrogenase activity, protein content and total soluble sugars, indicating its positive impact on seed quality. Bruchid infestation significantly reduced in treatment T₃ (1.42%), while untreated seeds exhibited the highest seed damage (16.50%). Teatment T₃ recorded the fewest live and dead bruchids per 400 seeds, as well as the lowest seed infection. Compared to other treatments, spinetoram 11.7 sc at 25.6 mg/kg seeds emerged as the most effective in controlling bruchids and maintaining superior seed quality, as reflected in its highest B:C ratio. Overall, this research suggests that spinetoram can be a highly effective solution for bruchid control and seed quality preservation in blackgram during storage.

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