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Resistance of Different Sunflower (Helianthus annuus Linnaeus, Compositae) Genotypes Against the Attack of Aphis gossypii Glover, Nezara viridula (L.) and Thrips tabaci Lind. in Field

Author(s): Muhammad Ashfaq | Muhammad Aslam

Journal: Journal of Biological Sciences
ISSN 1727-3048

Volume: 1;
Issue: 10;
Start page: 941;
Date: 2001;
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Keywords: Helianthus annuus L | host plant resistance | Aphis gossypii Glov | Nerzara viridula L | thrips tabai lind

The resistance of different sunflower genotypes against some insect pests was investigated in the field. Fourteen sunflower genotypes were screened against Aphis gossypii Glover (Aphids), Nezara viridula (L.) (Green stink bug) and Thrips tabaci Lind. (Thrips). In case of Aphids, the sunflower genotype 9705 was partially resistant whereas JH299S, JH199S, Hysun-777, T-562 and PSF-025 were found partially susceptible genotypes. The germplasms XF-263 and 1435 were taken as intermediately susceptible. The susceptible genotypes were PNSF-1 and 9706 when compared with standard germplasm. Parsun-1 and Award were found highly susceptible to Aphids population. In case of Nezara viridula, conclusion was made that the sunflower germplasms 9705, JH299S and JH199S were partially resistant against this pest as compare to Hysun-33 whereas Hysun-777 was found partially susceptible. PSF-025, T-562 and 1435 were declared as intermediately susceptible. PNSF-1 was susceptible. The sunflower germplasms XF-263, Parsun-1, 9706, 9707 and Award were taken as highly susceptible having highest number of pest as compare to Hysun-33. Results of Thrips tabaci concluded that 9706 and JH299S were partially resistant whereas XF-263 and Award were found highly susceptible to pest as compare to Hysun-33. The genotypes 9707, JH199S and Parsun-1 were partially susceptible to pest population. Hysun-777, T-562, PSF-025 and 1435 were taken as intermediately susceptible against thrips whereas PNSF-1 and 9706 were found susceptible. A negative correlation was also found between pest population and the yield of sunflower genotypes.
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