locust
First, Robinia pseudoacacia is very easy to attract stink bugs to harm fruit trees such as peaches, plums, pears, and apples. Stink bugs suck the sap of fruit tree twigs, petioles, leaves, flowers and fruits to maintain life. The leaves are dried up and the fruit is deformed, which has a great impact. Second, the tannins secreted by Robinia pseudoacacia have a greater inhibitory effect on the growth of most fruit trees, especially pears and apples. It can lead to a substantial reduction in fruit production or no fruit at all. Third, the deciduous anthracnose bacteria on the Robinia pseudoacacia can also infect pears, apples, etc., causing a large number of leaves to fall.
Paulownia
Many fruit trees, whether they are seedlings, saplings or adult fruit trees, are susceptible to purple stripe feather disease. After the fruit trees become ill, the leaves are yellowed, withered, and even the whole plant died. The paulownia is a wintering place for the pathogen of purple striated feather.
Cypress
Cypress and pear trees cannot co-exist in the same place, because the main disease of pear trees, pear rust, damages the new shoots, petioles, leaves, stalks and young fruits of pear trees, causing fruit branches to shrink, fruit deformation, rot and fruit drop; and cypress trees, especially Long cypress and juniper cypress are the wintering places of pear rust fungus. In the warm spring season, the overwintering bacteria will blow back to the pear trees with the wind to continue to multiply and harm the pear trees. Cypress and grapes cannot coexist. If the two are planted together, the grapes will not ripen easily, causing loss.
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