西瓜细菌性果斑病(BFB)是西瓜上的毁灭性病害,研究其侵染途径及防治方法对于西瓜生产具有重要意义.本研究通过对育苗基质人工接种西瓜细菌性果斑病菌,发现基质带菌能够导致西瓜幼苗BFB的发生.通过室内试验评估了可杀得叁仟、加瑞农、加收米、注射用硫酸链霉素、90％新植霉素5种药剂对西瓜细菌性果斑病菌的抑菌和杀菌效果,发现90％新植霉素(100、200、300 mg· L-1)对西瓜细菌性果斑病菌有较强的抑制效果,加瑞农(600、800倍液)处理细菌5h,对西瓜细菌性果斑病菌的室内杀灭效果达到100％.在此基础上,研究在基质带菌量为109cfu· kg-1的情况下,不同药剂消毒育苗基质对西瓜幼苗细菌性果斑病的防治效果.结果表明,每1 m3基质喷淋100 kg药剂,播种后的第15天,加瑞农600倍液和加收米400倍液对西瓜幼苗细菌性果斑病的防效分别达到46.4％和30.4％.%Bacterial fruit blotch (BFB) caused by Acidovorax citrulli (Ac) is one of the most devastating diseases for watermelon production. It's important for watermektn production to know the infection and control of BFB. Our experiment showed that infestation of soil mix with Ac culture can lead to occurrence of BFB on watermelon seedling. We used Kocidc 3000, Kasumin + Bordeaux, Kasumin, Streptomycin Sulfate and Streptomycin + Oxyteracykine to treated the infested soil mix. The result showed that Streptomycin + Oxyteracykine (100,200,300 mg·L-1) strongly inhibited growth of Ac. The bactericidal effect of Kasumin + Bordeaux (600 and 800X treated for 5 hours)on Aac were 100% in lab test. We treated soil mix containing 109 cfu Ac·kg-1 with Kasumin + Bordeaux (600X solution)and Kasumin (400X solution)at the rate of 100 kg·m-3,we observed control efficacy of 46.4% and 30.4%, respectively, at the stage of 15 days after sowing.
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