Because spring temperature is not stable, come on easily, cause bast decay easily, let Chinese flowering crabapple of a lot of big norms " break an arm " , die even, become a scar below Cheng Jing. Though the happening with ill decay of Chinese flowering crabapple is dense disease, but basically happen on feeble plant. How to undertake strengthening conserve, enhance tree situation, discovery disease prevents and cure in time, ten million not makes decay ill become the killer of good landscape.
[1] hair disease state
Wait for limb to kill Chinese flowering crabapple, apple, cortex of sicken place initial stage becomes Brown a bit, ill end of be good at organization is apparent, ill spot expands gradually after, ill ministry expands and bate, what the hand presses is easy cave, yellow brown liquid is poured out of, drying shrinkage of ill scar later period caves darkly is Brown, a lot of black are born on ill skin little grain (the cent of the bacteria gives birth to spore implement) , when receiving rain or weather moisture, the Chang Yi on small macula gives the spore role with orange yellow curly filiform. The lamina of branch of the sicken when disease is severe, dry upside becomes yellow down to is withered dead. The Chinese flowering crabapple of new transplant is much only then hair May, the Chinese flowering crabapple that grows normally only then hair at annual summer. From June begin a theatrical performance of the first ten days of a month forms scale shape nature to fall on bark of Chinese flowering crabapple cerebral cortex; The middle ten days of a month on July falls cerebral cortex organization chases gradual change color to die.
[2] come on the rule
The bacteria gives birth to spore with hypha, cent implement, ascus carapace is in old ill scar or dead bark hibernate. 3 ～ will be invaded in October catch and come on. 4, will mix in May will infect a height for two in August.
[3] come on condition
Tree force is weak, hurt power more low, freeze injury, arid, inanition, it is it is to cause disease of decay of Chinese flowering crabapple to produce popular main reason. Every can cause the element with tree weak force, can cause disease happening.
[4] countermeasure of prevention and cure
1, strengthen management, the cut down between seasonable pruning, ventilated and pervious to light, raise plant to fight go against a gender.
2, chop in time except burn down of diseased or infected plant, reduce cause of disease.
3, choice place is fought go against the tree with strong sex to plant, build mixed forest.
4, the proposal uses Shi Xun sparge or paint, root ministry uses corrupt bacterium spirit to add flourishing to grow a processing, enhance tree power, increase strength.
