Kailash Chaukikar, Rakesh Singh Marabi* and Shoumitra Bikash Das
Department of Entomology, College of Agriculture, JNKVV, Jabalpur-482004
Email: rsmarabi78@rediffmail.com
Received-20.03.2025, Revised-09.04.2025, Accepted-24.04.2025
Abstract: A field trial was conducted in RBD to know the efficacy of insecticidal seed treatment and foliar spray on insect pests of soybean and their natural enemies at Breeder Seed Production Farm, JNKVV, Jabalpur (MP) during Kharif season. All the insecticidal treatments were sprayed on 35 days old crop (DOC). Observations of insect pests and natural enemies was recorded on 35, 55 and 75 DOC. Observation of whitefly was taken by caging the individual plant, while larval (S. litura and C. acuta) and adult (spider and lady bird beetle) population was recorded in per meter row length (mrl) basis. Incidence of YMD, stemfly and girdle beetle was recorded in percent basis. The results revealed that T7, T8 and T11 on 35, 55 and 75 DOC was significantly better than other treatmentsover the control. Seed treatment with Imidacloprid 48FS @1.25 ml / kg seed (T1) and with Thiamethoxam 30FS @ 10 ml / kg seed (T2) were effective in checking the YMD incidence during the early stage of the crop. Highest grain yield (2062.13 kg/ha) was registered in the treatment T7-seed treatment with Imidacloprid 48FS @1.25 ml / kg seed followed by foliar spray of Triazophos 40EC @ 800 ml / ha. The next insecticidal treatments also yielded better than the control were T11>T8> T12> T1>T2>T6>T5>T9>T10>T13>T14>T3>T4. Whereas, the lowest seed yield (8.54.70 kg/ha) was recorded from T15 (control). Maximum net return (Rs. 33045.35/ha) was obtained from T7-seed treatment with Imidacloprid 48 FS @ 1.25 ml / kg seed + Triazophos 40EC @ 800 ml / ha followed by T11-seed treatment with Imidacloprid 48FS @1.25 ml / kg seed + Flonicamid 50WG @ 200 g / ha (Rs. 25088.94/ha. Highest ICBR was recorded from T1 (1:0.97)followed by T7 (1:0.96) and T5 (1:0.94).
Keywords: Soybean, Whitefly, Stemfly, Girdle beetle, Infestation, Grain yield
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