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《Journal of Southwest Agricultural University》 1995-01
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THE INFLUENCE OF RARE-EARTH APPLICATION ON RESISTANCE TO WILT (FUSARIUM OXYSPOEUM F. SP.VASINFECTUM)IN COTTON

Bai Song (Kunming Animal and Plant Quarantine Bureau,Kunming 650034) Deng Xianming; Tan Wanzhong; Liu Guangzhen (Southwest Agricultural University,Chongqing 630716)  
Rare-earths containing different elements were applied to seeds of four upland cotton cultivars, two susceptible (Dai 16 and Jin 11) and to resistant (Zhong 12 and Chuan 73~27) to cotton wilt (Fussrium axysporum f. sp. vasinfectum), Rare-earth treatment at 300 mg/kg significantly enhanced wilt resistance of various cultivars:the rate of diseased plants was reduced by 18. 96% , 12. 08% , 15. 47% and 11. 45% ,the disease index was decreased by 22. 78,25. 60,19. 08 and 17. 43,the relative efficency of wilt prevention was 29. 19%, 29. 22%, 39. 23% and 29. 26%, and seed cotton yield was increased by 11. 4%, 19. 8%,8. 3 and 9. 6%,respectively,for the four cultivars mentioned above. The effect of rare earths of disease prevention and yield improvement appeared comparable with that of carbendozol. Rare earth solution at lower concentrations (50 or 100 mg/ kg)showed little, if any, effect of disease prevention and yield improvement, whereas at higher concentrations (500 or 1 000 mg/kg)the solution injured the plants.
【CateGory Index】: S435.621
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