Assessment of white cotton lines for resistance to jassid, Amrasca biguttula biguttula (Ishida) (Homoptera: Cicadellidae) | การประเมินพันธุ์ฝ้ายเส้นใยสีขาวต้านทานต่อเพลี้ยจักจั่นฝ้าย Amrasca biguttula biguttula (Ishida) (Homoptera: Cicadellidae)
2009
Sangkhae Nawanich(Kasetsart University, Bangkok (Thailand). Inseechandrastitya Institute for Crops Research and Development. National Corn and Sorghum Research Center) E-mail:ijssan@ku.ac.th | Wiboon Chongrattanameteekul(Kasetsart University, Bangkok (Thailand). Faculty of Agriculture. Department of Entomology) | Prapon Boonrumpun(Kasetsart University, Bangkok (Thailand). Inseechandrastitya Institute for Crops Research and Development. National Corn and Sorghum Research Center) | Sopon Uraichuen(Kasetsart University, Bangkok (Thailand). Faculty of Agriculture. Department of Entomology) | Walaiporn Yutphuak(Kasetsart University, Bangkok (Thailand). Inseechandrastitya Institute for Crops Research and Development. National Corn and Sorghum Research Center)
Field assessment of 10 white cotton lines/varieties for jassid resistance was conducted at National Corn and Sorghum Research Center, Pakchong, Nakhon Ratchasima Province during July 2007 to January 2008. The experiment was arranged as randomized complete block design with 3 replications. The results showed that the cotton line Ca 324 x SRT 1 no. 147-149 had low infested population of jassid throughout the growing season which were not significantly different from that of SRT 1, the resistant control variety. By ranking cotton lines according to the number of jassid infestation and rating scale of hopperburn symptom caused by jassid infestation, it was shown that both Ca 324 x SRT 1 no. 147-149 and SRT 1 had low jassid infestation and also low rating scale of hopperburn symptom. Moreover, the leaf hair density of Ca 324 x SRT 1 no. 147-149 was not significantly different from that of SRT 1 which is a hairy leaf variety. There was also a significant negative relationship between leaf hair density and jassid infestation. The results indicated that the cotton line Ca 324 x SRT 1 no. 147-149 has a high potential of jassid resistance and can be further-developed to be a new jassid resistant variety.
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