菌毒清防治苹果幼树根腐病效果好我们分别于１９９０年和１９９１年开垦了千亩荒滩地，原来荒滩上只生长着稀稀拉拉的刺槐和毛草。１９９０年３月２３－２５日栽植了３００亩苹果树。主栽品种为秋富１号和乔纳金。４月２５日发现占４２％的果树枝叶已经焦枯，但检查树干并... Bacterial poisoning prevention and control of young apple tree root rot effect is good We were reclaimed in 1990 and 1991 acres of wasteland, the original growth of sparse larvae only the original locust and grass. March 23-25, 1990 planted 300 acres of apple trees. The main cultivars are Qiu Fu 1 and Jonathan. April 25 found that 42% of the branches and leaves of fruit trees have been scorched, but check the trunk and ...