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《Journal of Anhui Agricultural Sciences》 2009-11
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Study on Biological Characteristics and Chemical Control of Sclerotium roffsii Sacc.Caused Peperomia tetraphylla Southern Blight

WANG Bing-wen et al(College of Horticulture,South China Agricultural University,Guangzhou,Guangdong 510642)  
[Objective]The research aimed to evaluate biological characteristics and screen effective fungicides of Sclerotium roffsii Sacc.caused by Peperomia tetraphylla southern blight.[Methods] The disease samples showing typical symptom were collected and pathogen was isolated based on Koch's rule.The biological characteristics of the pathogen were conducted,and 5 fungicides were selected and used for controlling the disease.[Results]The results showed that the optimum carban and nitrogen resource were sucrose and lopassium niruate.The growth rates of mycelia were fastest at the temperature of 30 ℃ and pH value 6.Darkness was benefitial to hyphal growth,but light was benefitial to sclerotial formation.Sclerotia cultured in pH value 4-6 could germinate at 100% after 2 days.It only germinated in 100 relative humidity and added water.The toxicity test in vitro showed that the inhibition rate of 3% Validamycin to Sclerotium roffsii was above 98% at the concentration of 400 μg/ml.[Conclusion]In the warm,humid and acidic circumstance where is benefitial to hyphal growth and reproduction of Sclerotium roffsii Sacc..Validamycin can be used as an effective fungicide.
【Fund】: 广东自然科学基金资助项目(07006697)
【CateGory Index】: S436.8
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