Robinia pseudoacacia is a very easy way to attract bugs to harm apple and other fruit trees. 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, which can lead to a substantial reduction in fruit trees or no fruit. Third, the deciduous anthracnose bacteria on the Robinia pseudoacacia can also infect pears, apples, etc., causing a large number of leaves to fall.
Many fruit trees, whether they are seedlings, saplings and adult fruit trees, are susceptible to purple stripe disease. When fruit trees become ill, the leaves are yellowed, withered, and even the entire plant is dead. Paulownia is a wintering place for the purple stripe disease fungus. .
Walnut trees are not suitable for planting walnut trees around the apple orchard because the jugquinone, which is the secretion of walnut leaves, drips into the soil after being rained on to cause damage to the apple roots and inhibit growth.
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