甜樱桃褐斑病抗性品种筛选及化学防治效果评价

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中图分类号：S662.5 文献标识码：A

Abstract：【Objective】Brown spot disease is the main disease restricting the development of sweet cherry industry.The purposeofthis studywastoscrenresistant cultivarsandevaluatetheeffectofchemicalcontrol，soas toprovide theoretical basis forproduction practice.【Methods】Using14fruiting treecultivarsand12non-fruitingtreecultivarsas materials，theresistance difference was statistically analyzed by field lesion investigation. Tebuconazole + mancozeb + beta-cypermethrin was usedfor pesticidecontroltest，andthenumberofleaflesions beforeandafteraplication wasanalyzed.【Results】Theresults showed that the fivevarieties of Hungarian A，Hungarian B，Yanyang，Huangmi andSamito were highly resistant （the number of lesions was less than 3/leaf ），and Wanhongzhu was highly susceptible （the number of lesions was 57/leaf）. The resistanceofhoneydewandvaleri were thestrongestintheunfruitfultrees.Chemicalcontrolshowedthattheeliminationrateof le sions in Qinying No. 3（mature）and Tamara（juvenile）was 100% ，but the phenomenon of‘negative efficacy’appeared in Xiongyin B（the lesion increased by 364.3% .【Conclusion】 There were differences in resistance among the tested cultivars， andthecemicalcontroleffectwasaffectedbythecharacteristicsofthecultivars.Thebredingofdisease-resistantcultivars and the precise medication strategy should be combined in production.

Key words： cherry；brown spot disease；disease-resistant cultivars；chemical control

甜樱桃又称大樱桃或欧洲甜樱桃，是北方落叶果树中成熟最早的果品，素有“春果第一枝”的美誉[]。（剩余4894字）