Seasonal incidence of major insect pests of greengram in relation to weather parameters

A study on the seasonal incidence of jassid, whitefly and pod borer on greengram, along with their correlation with abiotic factors was conducted during kharif 2022. Jassid infestation began in the first week of August (31st SMW) and peaked at 24.4 jassid per five plants in the fourth week of August (34th SMW). The jassid population showed a significant positive correlation with relative humidity, while its correlation with rainfall, temperature, and sunshine hours was non-significant. Whitefly infestation started in the first week of August (31st SMW) and reached its peak population of 32.28 whitefly per five plants in the last week of August (35th SMW). The infestation of pod borer larvae (H. armigera) peaked at 8.33 larvae per five plants, with an average pod damage of 17.67%, recorded during the first week of September (36th SMW). A non-significant correlation was observed between the populations of both whitefly and pod borer and various weather parameters.