| Abstrakt: |
In general, the insecticide treated plots performed significantly better than control for all the parameters against pink bollworm. Pink bollworm larval population on bolls was significantly less on all the treated plots than control. Three days after treatment, minimum number of larvae was recorded in novaluron, thiodicarb and spinosad as against the higher number of larvae registered in NSKE. Significantly, the highest number of larvae per 20 bolls was observed in control. However, the same trend was followed even at seven days after treatment also. Pink bollworm damage on green bolls was significantly less on all the treated plots than control. Three days after treatment, lowest green boll damage was recorded in thiodicarb, spinosad and lambda cyhalothrin, whereas the highest green boll damage was registered in control and was significantly different from NSKE. Seven days after treatment, the same trend was followed. Significantly, higher numberof Good Opened Bolls (GOBs) were recorded inspinosad, novaluron, indoxacarb, thiodicarb andlambda cyhalothrin than control, whereas minimum GOBs per plant were recorded in NSKE. Among the treatments, minimum Bad Opened Bolls (BOBs) per plant were recorded in spinosad, novaluron and thiodicarb, as against the higher number of BOBs per plant recorded in NSKE. Locule damage due to pink bollworm was significantly less in treated plots, viz., spinosad, thiodicarb and indoxacarb than control. Maximum locule damage was registered in NSKE, but significantly different over control. Significantly higher yield of seed cotton was recorded in spinosad (1935.20 kg/ha) and indoxacarb (1909.83 kg/ha), followed by thiodicarb (1890.10 kg/ha), novaluron (1866.73 kg/ ha) and lambda cyhalothrin (1802.17 kg/ha) than control (968.60 kg/ha), whereas NSKE recorded lower seed cotton yield (1507.27 kg/ha). [ABSTRACT FROM AUTHOR] |
