Disease of arboreous and easy occurrence decay and the tree with ill ulcer plant the summer have: Chinese flowering crabapple, Chinese flowering quince, young the tree such as age country pagoda tree, willow, poplar is planted.
The main reason that produces this disease is as follows:
1, grow arboreous majority newly to want to have many crop, bring about the cut that establish system more, and cultivate water of body much gush at ordinary times temporarily, add summertime temperature taller, the benefit fast breed at the bacteria, incidence of a disease is high.
2, clip of many the limb that establish system, bring about arboreous main force to do not have the shady protection of crown of a tree, bring about trunk to be insolated by the sun directly, make cultivate body skin ministry happening is necrotic, it is another when cause this disease main reason.
3, green Pi Shu plants easy happening this are ill, because green skin is cultivated,basically be, much skin is thin, ability of disease-resistant of adverse to the outside element is poor, and leather ministry stoma is opposite bigger, bacterium of easy catch a disease catch a disease is invaded catch a harm.
4, grow arboreous moisture management newly not to reach the designated position, cause the happening of this disease and harm easily.
5, because impose arboreous root system newly,be cut off more, although root ministry has water, but the moisture that can be absorbed to use by tree is finite, cannot satisfy tree to grow demand, bring about tree to fight go against ability difference, appear local dehydrate necrotic, cause cankered, ulcer.
Precautionary measures:
1, cultivated hind, irrigate in time show water, have fill root with rooted agent, stimulative root system is sent quickly, from soil inside absorb nutrition and moisture in time, contented tree grows demand, reduce disease happening.
2, use careless rope or protect wet area to undertake truncal wrap up, avoid sun's rays to insolate directly, lift too quickly with the temperature that establish system, avoid day bright harm.
3, tree body is defeated by juice of nutrient condole needle, complement cultivates body nutrition and moisture, satisfy the requirement that establish system.
4, the gush that establish system applies antiseptic. After Yu Shumu is cultivated, every half moon is right truncal undertake gush applies much bacterium spirit, Dai Sen the antiseptic such as copper of oxidation of element of garlic of manganese zinc, second, hydrogen.
