Abstract:
White-backed planthopper (WBPH) Sogatella furcifera is one of the most important insect pestsof rice throughout the Asia. The recentabundance of pest in Pakistan is in ascending order that requires highattention. Therefore, this study was designed to observe the emergingsuitation of WBPH in Sindh provincewhich is the main stack holding area of rice. Three different ecological zones of Sindh provinceincludingLarkana, Jacobabad and Badin were selected. The study was based on a sample of 25 tillers covering all areafrom an acre in orderto record the pest population randomly. Later, the pest population was also recorded atparticular stages of rice (tillering, milking andbooting) with effect of abiotic factors (temperature and relativehumidity). In last, the varietal screening of 30 local rice varieties in term ofpest population was observed.The data were collected for two rice growing seasons 2012 to 2013. In results, the maximum meanpopulationof 15.25 WBPH/25 hills at 38 0C with 50% relative humidity was observed in district Badin in the firstweek of August, 2012.The correlation results regarding mean population of WBPH also indicated effect oftemperature and relative humidity (r= 0.51, 0.63 and0.85 in Larkana, Jacobabd and Badin). In crop stages,the WBPH was observed highest in booting stage in district Badin 11.21±0.45 inyear 2012. In varietalscreening, the highest population of 3.87±0.49 was recorded on IR-8 and the lowest on RH-302 (0.870.26).However, the results in 2013 were recorded different with the maximum mean population of 3.58±0.77 onDR-57 and the lowest on IR-8 (2.03±0.33). The present findings will be useful to manage strategy in order to reduce the pest population of WBPH in future that ultimately affect the yield of rice.
Page(s):
246-253
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Agricultural Research, Volume: 31, Issue: 3, Year: 2018
Keywords:
Rice stages
,
Sindh province
,
abiotic factors
,
Rice varieties and Ecological zones
,
Sogatella furcifera