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

  • MK Sharma Department of Statistics, Faculty of Science, Addis Ababa University, PO Box 1176 Addis Ababa, Ethiopia
  • V Pandey Crop Research Station, Masodha, N.D.U.A. and Technology, Faizabad 224133, India
  • RS Singh Crop Research Station, Masodha, N.D.U.A. and Technology, Faizabad 224133, India
  • RA Singh Crop Research Station, Masodha, N.D.U.A. and Technology, Faizabad 224133, India
Keywords: Meteorological factors, path analysis, regression analysis, rice insect pests

Abstract

The effect of meteorological factors on the population build up of green leafhopper Nephotettix 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 (1988–1997). 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.

Key words/phrases: Meteorological factors, path analysis, regression analysis, rice insect pests

SINET: Ethiopian Journal of Science: Vol. 27 (2) 2004: 165–170
Published
2005-10-18
Section
Articles

Journal Identifiers


eISSN: 2520-7997
print ISSN: 0379-2897