Seasonal incidence of major insect pests infesting field pea
Manisha, Tarun Verma, Roshan Lal, Nadaf Ansar V and Meenakshi Devi
Seasonal incidence of insect-pests viz. Etiella zinckenella, Helicoverpa armigera, Polyommatus boeticus, Chromatomyia horticola and Caliothrips indicus on field pea was studied under field conditions during rabi 2015-16. Peak population of H. armigera (1.22 larvae/ plants), E. zinckenella (5.94 larvae/plant), P. boeticus (1.55 larvae/plant), C. horticola (3.4 larvae/leaf) and C. indicus (3.05 /plant) was recorded on 8th, 10th, 12th, 8th and 7th Standard meteorological weeks (SMW), respectively. Etiella zinckenella population shows significant positive correlation with temperature (max.-min.) i.e. r=0.715* and 0.821*. However C. indicus and C. horticola population was found significant negatively correlated with temperature maximum (r=-0.508* and r=-0.712*) and minimum (r=-0.659* and r=-0.680*), respectively. Whereas positive and significant correlation was found between C. horticola population and morning relative humidity (r= 0.731*).