Yield-Loss Infestation and Economic Injury Level for the Pea Pod Border, Lampides boeticus (Linn.) in Manipur

摘要

The economic injury level (EIL) of Lampides boeticus in the field was found to be 1.24% pod infestation on pea crop cv. Rachana. Control measure could be given before reaching this level of infestation. Such a level could be obtained between last weekof January and first week of February i.e., after one week of exposure of the pea crop to the pest infestation Maximum (73.11 q/ha) and minimum yield (37.17 q/ha) were recorded when the lowest (0.58%) and highest (25.89%) pod infestation occurred duringfull protection (FP) and no protection (NP) treatments, respectively. A highly significant negative correlation (r = -0.960, P = 0.01) was observed between the pod infestation and healthy yield. The maximum yield lost over FP was 35.94 q/ha.