Planting Technology Lists
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What are the harmful characteristics of Robinia pseudoacacia mosaic disease? What is its pathogen?
Robinia pseudoacacia mosaic is a common disease of Robinia pseudoacacia. The disease began from April to May in spring. The symptoms are systemic mosaic. The color of the leaves is uneven, some appear light green, dark green mottled, and show bubble spots. Some leaves are deformed; the shape of the leaf becomes narrower and longer, and in severe cases it is linear. Some leaf axil adventitious buds germinate and produce thin branchlets with very short internodes, the leaves are narrow, and the axillary buds of branchlets germinate and draw out branchlets again, so that they germinate and grow step by step, forming a clump of branches and leaves. Affect the normal growth of the tree, after the young tree is damaged, one by one
2019-01-15 -
Black locust mosaic disease
[distribution and harm] it is quite common in Beijing and Shandong. Affect the growth of young trees, resulting in dwarfism. [symptoms] the leaf surface shows irregular line patches, the distribution is not located, and the pattern is beautiful. Some leaves become smaller and the leaf color becomes lighter. If you do not observe carefully, it is easy to be neglected. When the leaf axil adventitious buds germinate, the weak branches and branchlets are clustered. Occurs in Eastern Europe, Central Europe or the United States, the leaf becomes smaller, the vein is bright, the petiole is short, the plant is vulnerable to freezing injury, and often have many branches, yellowing phenomenon. British mosaic with mottled leaves and twisted leaves and bent wood
2019-01-15 -
What are the characteristics of Robinia pseudoacacia valley moth? What is the method of prevention and control?
Robinia pseudoacacia valley moth is commonly known as Robinia pseudoacacia. It mainly harms Robinia pseudoacacia. When the larvae eat the trunk cortex, the tissue in the affected part is proliferated and expanded, the bark is warped and cracked, the skin is filled with rotten tissue, and the skin is sewn with insect dung, which can lead to the weakness of the tree and even the death of the whole plant. Adult, female moth 7 mm 10 mm long, wingspan 17 mm 22 mm, male moth slightly smaller; gray-white or black-brown body, gray-white chest and wing base; gray-white forewings mixed with grayish brown or dark-brown scales, wing base with erect dark-brown scale clusters, wing surface 2 horizontal scale clusters
2019-01-15 -
The occurrence regularity of Robinia pseudoacacia valley moth?
The occurrence regularity of Robinia pseudoacacia valley moth: Shandong occurs for 2 years a year, overwintering with different instar larvae of the second generation in the trunk tunnel. It was harmful to active feeding in late March of the following year, and the peak period of Eclosion was in the middle of May. Most of the eggs lay in the wounds of the branches or in the cracks in the bark, and the first generation of larvae began to hatch in mid-June. The newly hatched larvae move lively and sneak into the subcutaneous phloem and cork cortex, showing a longitudinally irregular tunnel. The injured site proliferated and expanded, and the bark warped and cracked. The mature larvae begin to pupate in the middle of July, the adults can be seen in the last ten days, and the emergence peak is in the middle of August.
2019-01-15 -
The method of accelerating budding and raising seedlings of Robinia pseudoacacia
Robinia pseudoacacia is resistant to drought, barren and growing fast, so it is a good tree species for greening and afforestation in rural areas. If the root segment budding method is used to raise seedlings, not only the cost is low, the operation is simple, but also the seedling quality is good. First, select the land to make the bed and choose the nursery land with leeward and sunny direction, flat terrain and good drainage and irrigation as the hotbed. Before making the border, 1000 kg of organic fertilizer, 50 kg of ammonium bicarbonate and 50 kg of calcium superphosphate were applied per mu. After ploughing and raking, 100 ∶ 1 wheat bran and methamidophos bait were sprinkled on the border surface to prevent mole cricket and other underground pests. The border faces from north to south, 1.5 meters wide and 12 meters long.
2019-01-15 -
Seed treatment of Robinia pseudoacacia
The dry Robinia pseudoacacia seed is very hard, the seed cortex is dense and the water permeability is poor. Robinia pseudoacacia seeds are often used in production with 50 ℃ warm water, but the effect is not as good as that of boiling water. The operation steps are as follows: pour the boiled water into the water tank or other container, the amount of water injected is about 1/2 of the container. Put the Robinia pseudoacacia seeds into boiling water. Keep stirring the boiling water with the plank so that the seeds of Robinia pseudoacacia are heated evenly in the boiling water. After stirring for 5 minutes, quickly add cold water to cool down, and the water temperature will not be hot. Fish out the blighted seeds floating on the surface of the water and soak the seeds in warm water for 24 hours. The next day, dump it.
2019-01-15 -
Shaping and pruning of Robinia pseudoacacia
Robinia pseudoacacia is an excellent tree species for afforestation and afforestation in our province because of its fast growth, strong adaptability and excellent quality. But Robinia pseudoacacia sprouting is very strong, if not pruned, it will grow full of branches, not ventilated, thus affecting the growth rate. According to the observation, the average annual growth of Robinia pseudoacacia after correct pruning is 72cm, while that of no pruning is only 49cm, which is pruned continuously, which is 3-5 years earlier than that without pruning. In order to achieve this goal, attention must be paid to shaping and pruning. Under the condition of natural growth, Robinia pseudoacacia has strong branching ability and exuberant growth.
2019-01-15 -
Characteristics and cultivation techniques of Robinia pseudoacacia
Robinia pseudoacacia, also known as Robinia pseudoacacia, German locust. Robinia pseudoacacia branches and roots flammable, firepower, large heat, less smoke, long fire time, is a high-grade fuelwood, is a good tree species for the development of fuel forest. Robinia pseudoacacia leaves are very good fodder, whether fresh leaves or withered leaves, are favored by livestock. Robinia pseudoacacia is also a good nectar plant, and the famous "locust nectar" is made by bees collecting locust nectar. There are Robinia pseudoacacia (also known as thornless Robinia pseudoacacia), Robinia pseudoacacia (also known as Robinia pseudoacacia, Robinia pseudoacacia, Korean Robinia pseudoacacia,
2019-01-15 -
Planting method of Robinia pseudoacacia in Autumn and Winter
It is the best time to cut off and plant Robinia pseudoacacia in late autumn and early winter, which is characterized as follows: first, avoid the peak period of tree planting in spring and busy season, make full use of winter leisure, and the quality of planting time is fully guaranteed. Second, according to the physiological characteristics of Robinia pseudoacacia, the daily average temperature needed for root growth is relatively low, and the aboveground part stops growing after defoliation in autumn, while the underground part still grows for some time, and when the leaves fall, the mobile nutrients of the branches and leaves return to the trunk and root, when the root is rich in storage and nutrition, so that the root system has a growth stage. The third is to plant thorns
2019-01-15 -
Control of powdery mildew of Robinia pseudoacacia
The methods to control powdery mildew of Robinia pseudoacacia are as follows: first, clean up the withered branches and leaves in time and burn them centrally. Second, spraying 2000 times of 10% Shigao granule or 1500 times of 25% Teflon wettable powder or 3500 times of Teflon wettable powder at the initial stage of the disease can have a good prevention and control effect.
2019-01-15