Response of Maize Genotypes to Maize Weevil (Sitophilus zeamais Motsch.)
The maize weevil, Sitophilus zeamais Motsch., is the most serious stored product insect-pest in Thailand. Grain damage up to 90％ has been reported for untreated maize during storage. The study was conducted to evaluate the response of promising hybrids and inbreds in the condition of S. Zeamais Motsch. Infestation. A total 36 hybrids and 48 inbred lines, obtained from maize breeding project, were evaluated separately in the laboratory at Nakhon Sawan Field Crops Research Center. Samples of each hybrid and inbred, 30g each, were infested with 25 unsexed and 1～7 days old weevils for 7 days. Each experiment was laid out in a randomized complete block design with three replications. Total adult maize weevils emerged, percentages of grain damaged and grain weight losses were recorded at 90 days after the storage. Significant differences (P<0.5) were detected among hybrids and inbreds for all traits measured. The average number of adult weevils emerged were 66.4 and 78.0, the percentages of grain damaged were 64.7 and 57.5, the percentages of grain weight losses were 14.5 and 15.3 for hybrid and inbreds, respectively. Significant correlations were obtained among the three evaluated parameters in both experiments. The three superior hybrids and two inbreds, which showed<5.0 percent weight loss were considered for further use in maize breeding program.
Maize Maize weevil Sitophilus zeamais Motsch
Amara Traisiri Pichet Grudloyma Surapong Prasitwattanaseri
Nakhon Sawan Field Crops Research Center, Takfa, Nakhon Sawan, Thailand 60190
国际会议
第九届亚洲玉米大会(the Ninth Asian Regional Maize Workshop)
北京
英文
179-182
2005-09-05（万方平台首次上网日期，不代表论文的发表时间）