A study on light trap catches of some rice pests in relation to meteorological factors

Abstract

The effect of meteorological factors on the population build up of green leafhopperNephotettix virescens Dist (Cicadellidae, Hemiptera), plant hoppers Cofana spectra Dist (Delphacidae, Hemiptera) and C. yasumatsui Young (Kolla mimica, Hemiptera) and rice gundhi bug Leptocoriza acuta Thunberg (Alydidae, Hemiptera) in rice growing season (July to November) was studied through light trap collection during ten years (1988)(1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997). Maximum populations of Nephotettix virescens Dist (Cicadellidae, Hemiptera) and C. yasumatsui Young (Kolla mimica, Hemiptera) were recorded in the third week of October during all the years. Cofana spectra Dist had maintained peak activity in respect of population in the last week of September and third week of October. Leptocoriza acuta Thunberg (Alydidae, Hemiptera) had maximum population in second and third weeks of October during the aforesaid period. No meteorological factors have significant effect on the population build up of Nephotettix virescens Dist, Cofana spectra Dist and C. yasumatsui Young in the month of October. In the case of Leptocoriza acuta Thunberg, no other factor but rainfall had positive correlation of order 0.857 with population build up in the fourth week of September.

Effect of abiotic factors on the population dynamics of paddy earhead bug, Leptocorisa oratorius F

“…The observation on the bug population also indicated that its appearance coincided with the flowering stage of the rice and the peak population was recorded only one week after its 1 st appearance and then after decrease in its population gradually took place which came down to zero on the last date of observation 11 Nov.2020. Similar results were also found by Sharma et al [18] , who observed Leptocorisa acuta Thunberg (Alydidae, Hemiptera) had maximum population in the second and third weeks of October during the aforesaid period. Singh et al [20] found that the maximum population of gundhi bud was recorded in the 43 rd SMW and 48 th SMW.…”

Effects of Different Weather Parameters on Insect Pest Incidence in Paddy in Sundarbazar Lamjung

“…From Table 2, we found out that short-horned grasshopper and rice gundhi bug had a negative insignificant correlation with an r value of -0.019 and -0.297 respectively. This is contrary to the findings of Sharma, et. al (2004).…”

“…They also found a significant negative correlation of the minimum temperature of L. acuta at Jagdalpur, India. But our findings were in status quo with the findings of Sharma et. al.…”

Fluctuación poblacional de la novia del arroz (Rupela albinella) en Calabozo Estado Guárico, Venezuela

“…Hoy en día, las lámparas de luz negra son ampliamente utilizadas para atrapar insectos en muchos cultivos a nivel mundial, la identificación y el conteo de las plagas del arroz capturadas con el empleo de TDL son importantes para monitorear su dinámica poblacional y poder llevar a cabo su pronóstico 33 . De esta manera, se puede determinar el período activo para controlar los insectos plaga bajo condiciones de campo, y poder evitar la pérdida de la cosecha del arroz causada por ellos 34 . Los factores meteorológicos juegan un papel importante en la abundancia estacional, distribución y acumulación de población de plagas de insectos.…”