Evaluation of betacyfluthrin 90 g/l + imidacloprid 210 g/l (Solomon 300 OD) against sucking pests of cumin (Cuminum cyminum)

The trial was conducted in the experimental area of the College of Horticulture, Mandsaur, during 2020-21 and 2021-22, using a Randomized Block Design with three replications and seven treatments. Three doses of Betacyfluthrin 90 g/L + Imidacloprid 210 g/L OD @ 300, 400 and 500 ml/ha, Betacyfluthrin 25 SC (Betacyfluthrin 2.45% w/w SC) @ 1800 ml/ha, Imidacloprid 200 SL (Imidacloprid 17.8% w/w SL) @ 525 ml/ha and Thiamethoxam 25.00% WG @ 100 gm/ha including untreated control were tested. Two sprays were made at 10-days intervals, and observations were recorded at pre-treatment and 3, 7 and 10 days after each application and the calculated percentage reduction over control (ROC) after the last observation of the last spray. In 2020-21, Betacyfluthrin 90 g/L + Imidacloprid 210 g/L OD @ 500 ml/ha recorded minimum aphid population and showed significant difference with rest of the treatments with maximum% ROC (92.23%) followed by Betacyfluthrin 90 g/L + Imidacloprid 210 g/L OD @ 400 ml/ha (79.81%) and Betacyfluthrin 90 g/L + Imidacloprid 210 g/L OD @ 300 ml/ha (74.97%), Imidacloprid 200 SL @ 525 ml/ha (73.88%) and Thiamethoxam 25.00% WG @ 100 gm/ha (69.68%). Similar findings were recorded during second season (2021-22), where Betacyfluthrin 90 g/L + Imidacloprid 210 g/L OD @ 500 ml/ha again recorded significant minimum aphid population and maximum% ROC (92.57%) followed by Betacyfluthrin 90 g/L + Imidacloprid 210 g/L OD @ 400 ml/ha (78.62%) and Betacyfluthrin 90 g/L + Imidacloprid 210 g/L OD @ 300 ml/ha (74.97%). First year (2020-21) Betacyfluthrin 90 g/L + Imidacloprid 210 g/L OD @ 500 ml/ha again recorded minimum thrips population and maximum% ROC (85.80%) and found to be at par with Betacyfluthrin 90 g/L + Imidacloprid 210 g/L OD @ 400 ml/ha (78.17%) followed by Betacyfluthrin 90 g/L + Imidacloprid 210 g/L OD @ 300 ml/ha (71.61%). Similar trend of efficacy was recorded during the second season, where Betacyfluthrin 90 g/L + Imidacloprid 210 g/L OD @ 500 ml/ha recorded the minimum thrips population and maximum% ROC (85.53%) and did not differ significantly from Beta-cyfluthrin 90 g/L + Imidacloprid 210 g/L OD @ 400 ml/ha (75.89%) followed by Betacyfluthrin 90 g/L + Imidacloprid 210 g/L OD @ 300 ml/ha (72.95%). Treatments Betacyfluthrin 90 g/L + Imidacloprid 210 g/L OD @ 500 ml/ha recorded the highest fruit yield of cumin among various treatments during both the season (2020-21 & 2021-22).