秋红早蜜桃根癌病的发病规律调查

Study on Treatment of Agricultural Chemical Wastewater Containing Diazenesul Fonic Acid

[目的]探讨秋红枣蜜桃根癌病的发病规律。[方法]从2007年4月5日萌芽期开始对露地的秋红早蜜被侵染发病的病株进行癌瘤直径的测定,从2006年12月20日升温后的萌芽期对温室超红珠桃树被侵染发病的病株进行癌瘤直径的测定。测定时均是每隔7d测定1次,每株测定1～2个病瘤,测定最大直径和最小直径,以平均直径为标准研究根癌病的侵染规律。[结果]露地根癌病侵染为害桃树最猖獗的时间:一是开花前-果实发育期,二是秋季,但为害情况远轻于第1个高峰区,高峰期之间为缓慢生长和自身腐烂的时期。温室桃树开花座果期和幼果发育期,是养分消耗最大期和树体抗性最弱期,也是根癌病侵染最重期。[结论]桃树萌芽期、桃树仲夏剪期前和8月为病瘤腐烂减小期,也是温室根癌病防治关键期。

[Objective] The research airned to explored the pathogenesis of Agrobacterium tumefaciens of Qiuhong early-ripening peach. [Method] The diameter of cancer tumor in Qiuhong early-ripening peach and Greenhouse Chaohongzhu peach were determined from germination stage. They were determined every 7 days, and the most biggest and the most smallest diameter of 1-2 cancer tumor were determined per plant. The pathogenesis of A grobacterium tumefaciens was studied based on average diameter. [Result] It demonstrated that the most rampant damage was the peach blossom time before the fruit developing period, The next time wais the autumn, but it was far less damage than the first peak. Peach fruit greenhouse flowering period and fruit development period was the most nutrient consumption period and the weakest of the tree resistance, which was the most infected time. [Conclusion] The germination stage, the cutting period in midsummer and the August were the period of cancer tumor becoming small of Agrobacterium tumefaciens. So this period was also the key period of controlling greenhouse A grobacterium tumefaciens.