Abstract:
Twenty two rice varieties, 6 medium maturing, 7 early maturing coarse rice and 9 fine rice varieties were tested against the Whitebacked Planthopper, Sogatella furcifera (Horvath) (Homoptera: Delphacidae) under field and green house conditions. The experiments were conducted at Rice Research Institute, Dokri during the year 2008. Two observations WBPH (White backed Plant hopper) to count (nymphs and adults) were taken during the experiments. The first and second observations of WBPH were observed on 60-65 and 80-85 DAT (Days after Transplanting) respectively. Interval between the observations was 20 days in both field and green house conditions. High populations of WBPH were recorded on 80-85 DAT. The result showed that variety BG 276-5 was noted comparatively susceptible and variety IR15323-78 was observed resistant from the Medium Maturing coarse rice varieties. No significant difference was observed between Early Maturing (DR-83xDR-200, DR-64, and DR-64xDR83) rice varieties in the first observation. The rice variety DR-83xS.Kangni is comparatively more susceptible than the other varieties. Population per hill was recorded 2.20 and 3.10 under field and green house condition, respectively. The variety DR- 64xDR-83 is comparatively more resistant than the other varieties. Low WBPH population was recorded in Early Maturing Rice varieties DR-64, and DR-64xDR-83. In fine rice varieties, the maximum population of WBPH per hill was observed in variety DR-65 (0.41 and 0.70) and Basmati 370 (0.41 and 0.80) in field and green house.. The experimental results show that Medium Maturing rice varieties are more susceptible for WBPH than early maturing and Fine rice varieties.
Page(s):
105-110
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Entomology, Volume: 27, Issue: 2, Year: 2012