Seasonal incidence of derbid plant hopper, Proutista moesta westwood (Derbidae:Hemiptera) in sugarcane

Seasonal incidence of the Derbid planthopper, Proutista moesta, in sugarcane was studied in the Terai Zone of Northern West Bengal for two years, 2017-18 and 2018-19, with the goal of gathering information about this pest in this area in order to know seasonal abundance. The derbid plant hopper/plant began to rise in the second fortnight of June 2017 and recorded its peaked in the first fortnight of December (23.4 hopper/plant), when the maximum and minimum temperatures (°C) were 27.56 and 13.69, respectively, with relative humidity (percent) maximum and minimum of 97.0 and 53.8, respectively. During this period, there was no rainfall (mm) recorded. After first fortnight of December downward tendency was noted. During 2018-19, a similar pattern was observed. The maximum temperature and relative humidity were found highly positive significant relation in a seasonal study of derbid plant hoppers, whereas rainfall was showed negative significant.