秋红早蜜桃根癌病的发病规律调查

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。

Investigation on the Pathogenesis ofAgrobacterium tumefaciens of Qiuhong Early-ripening Peach

Objective] The research aimed to explore one treatment method of agricultural chemical wastewater containing Diazenesul Fonic Acid.Method ] The agricultural chemical wastewater containing Diazenesul Fonic Acid was treated by twice times of light catalytic oxidation,then was absorbed by absorbefacient charcoal.Result] The method reduced the COD content of agricultural chemical wastewater containing Diazenesul Fonic Acid from 22 000 mg/L to 5 600 mg/L and the proportion of BOD/COD was 0.43.Conclusion] The COD content of the agricultural chemical wastewater containing Diazenesul Fonic Acid after treated reached the demand of biology treatment.