Seasonal Incidence of Rice Gundhi Bug, Leptocorisaoratorius F. (Hemiptera: Alydidae) in Three Different rice Growing Seasons of Assam
Priyanka Saikia, Bijon Chandra Dutta, Rituraj Saikia
Journal of Experimental Agriculture International · pp. 72–78 · Published 27 Jul 2022
10.9734/jeai/2022/v44i1030879Abstract
Study on seasonal incidence of rice gundhi bugwas carriedout to know their incidence in threedifferent rice growing seasons of Assam, viz., sali (var. Ranjit), boro (var. Joymoti) and ahu (var. Disang) during 2020-21 at Regional Agricultural Research Station, AAU, Titabor.In sali rice, the lowest population (0.05 gundhi bug hill-1) was observed on 40th Standard Meteorological Week (SMW) and the highest (0.9 gundhi bug hill-1) was recorded on 46th SMW during 2020. In boro rice, the lowest population (0.3 gundhi bug hill-1) was recorded on 14th SMW and the highest of 3.75 gundhi bug hill-1 was recorded on 20th SMW during 2021. During ahu season, the lowest population (0.25 gundhi bug hill-1) was also recorded on 14th SMW and the highest (1.2 gundhi bug hill-1) was on 19th SMW during 2021. On an average, the highest population of gundhi bug was observed in bororice followed by ahu and sali. During saliseason, population build-up of gundhi bug showed significant positive correlation with morning relative humidity (r=0.734) and bright sunshine hour (r= 0.661). While, during boro and ahu rice the gundhi bug showed significant positive correlation with minimum temperature (boro, r = 0.600; ahu, r =0.649), evening relative humidity (boro, r= 0.643; ahu, r= 0.614) and number of rainy days (boro, r = 0.742; ahu, r= 710).
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