Indexing

Seasonal Occurrence of Bihar Hairy Caterpillar and Tobacco Caterpillar on Black gram under Unsprayed Conditions

Author: M.S. Meena, H.P. Meghwal, L.S. Saini, D. Parmar and D.K. Saini,

PDF Download PDF

Abstract

The infestation of Bihar hairy caterpillar (S. obliqua) appeared in 1st week of August (32th SWM) with an average population of 0.26 larvae/mrl. The peak larval population (3.80 larvae/mrl) was observed during 2nd week of September (37th SMW). The infestation of Bihar hairy caterpillar had positive correlation with minimum temperature (r = 0.33), morning relative humidity (r = 0.33) and evening relative humidity (r = 0.62) and whereas, negative correlation with rainfall (r = -0.55) and maximum temperature (r = -0.25). Tobacco caterpillar (Spodoptera litura Fab.) was observed throughout the crop growth period i.e., from 1st week of August to 1st week of October. The infestation gradually increased and reached its peak (3.27 larvae/mrl) during 2nd week of September (37th SMW). The infestation of Tobacco caterpillar was positive correlated with minimum temperature (r = 0.34) and morning relative humidity (r = 0.38) and evening relative humidity (r = 0.62), while negatively correlated with rainfall (r = -0.28) and maximum temperature (r = -0.11).

Keywords

temperature, caterpillar, Tobacco Caterpillar, Black gram, Vigna mungo.

Conclusion

The initiation of Bihar hairy caterpillar population (0.26 larvae/mrl/5 plant) started after the 1st week of August, reaching its peak (3.40 larvae/mrl/5 plant) in the 3nd week of September (37th SMW). Similarly, the initiation of tobacco caterpillar population (0.13 larvae/mrl/5 plant) occurred after the 2nd week of August, reaching its peak (3.27 larvae/mrl/5 plant) in the 2ndweek of September (37th SMW). Bihar hairy caterpillar and tobacco caterpillar population showed negative correlation with maximum temperature and rainfall, while positive correlation with minimum temperature, morning relative humidity, evening relative humidity

References

-

How to cite this article

M.S. Meena, H.P. Meghwal, L.S. Saini, D. Parmar and D.K. Saini (2024). Seasonal Occurrence of Bihar Hairy Caterpillar and Tobacco Caterpillar on Black gram under Unsprayed Conditions. Biological Forum – An International Journal, 16(5): 78-80.