Robinia pseudoacacia is the first to cause locusts to easily harm the fruit trees such as peaches, plums, pears, and apples. The tadpoles feed on the juice of the young branches, petioles, leaves, flowers and fruits of the fruit tree to sustain their lives. As a result, leaves wither and wither, and fruit deforms, which has a great impact. The second is that the tannic acid secreted by Robinia pseudoacacia has a greater inhibitory effect on the growth of most fruit trees, especially pears and apples. Can lead to a substantial reduction in fruit trees or no fruit. Third, deciduous anthracnose on Robinia pseudoacacia can also infect pears, apples, etc., causing a large amount of fallen leaves.
Paulownia, because many fruit trees, whether they are seedlings, saplings and adult fruit trees, are susceptible to purple feather disease. After disease, fruit trees cause yellowing, dryness, and even death of the entire plant. Paulownia is a wintering place for purple feather disease .
Cypress cypress and pear cannot co-exist, because the main disease of pear is pear rust, which damages the new shoots, petioles, leaves, fruit stalks and young fruits of the pear tree, leading to shrinking fruit branches, deforming, rotting and falling fruit. It is the cypress and cypress, and it is the wintering place of the pear rust fungus. In the warm spring season, the overwintering bacteria will return to the pear tree with the wind to continue to multiply and harm the pear tree. Cypress trees and grapes cannot coexist, and if the two are planted together, the grape fruit is not easy to mature, causing losses.
Walnut tree. Because walnut leaf quinone secretion of walnut leaves is rained, it drips into the soil to harm apple roots and inhibit growth. Therefore, walnut trees should not be planted around apple orchards.
Pine trees, due to the spores of pine trees, drift to the orchard in the wind in the spring and summer, which will seriously damage the fruit trees, especially the pear trees. Pine spores can cause yellow spots and bristle clusters on pear leaves and fruits, deform the fruits, severely reduce fruit set rate, reduce yield and quality, and affect economic benefits.
Elm trees should not be planted near elm vineyards, because elm trees are the favorite trees of Citrus star beetle and brown beetle. Planting elm trees will induce a large amount of feeding and reproduction of Monochamus alternatus, which will seriously endanger fruit trees. In addition, the secretions of the elm roots are very harmful to grapes, which can easily lead to grape yield reduction or even death of the entire plant.
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The concentration of sodium citrate required for the erythrocyte sedimentation test is 3.8%, and the ratio of anticoagulant to blood is 1:4. This is a special test tube for the erythrocyte sedimentation rate. The sample type is plasma, which is suitable for erythrocyte sedimentation. Immediately after blood is drawn, it is reversed and mixed 5-8 times. It should be shaken again when it is used. The difference between it and the test tube for coagulation factors is that the concentration of anticoagulant is different from the proportion of blood and cannot be confused.
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