Control methods of diseases and insect pests such as Suzuki tree mildew spot, powdery mildew, tortoise wax scale and so on

As a plant lover, I seem to be full of feelings for most plants, and few don't like them, but I have a complicated feeling about Suzuki.

The Platanus tree gets its name because the round fruit on the tree looks like a "hanging bell". The fruit ball can hang on the tree for a long time, from the autumn fruit period to the next spring and summer, but during the strong wind, it will fall sporadically, break into yellow shavings, and some are blown away by the wind directly on the tree.

The wind is invincible with yellow shavings. It's okay to fall on hair and clothes. It also likes to drill into its eyes. Many people will be allergic to it, so it's naturally unlovable.

But the Platanus tree still has its gratifying features, such as majestic tree shape, dense branches and leaves, and green lush.

Autumn yellow leaves fall, one foot falls is "squeak" a piece, very much like.

At the same time, it is also a world-famous fine shade tree and street tree, known as "the king of street trees".

A good-looking tree should be preserved as much as possible.

Today, the editor will introduce how to treat Suzuki after getting sick.

Mildew spot

It mainly harms the leaves of Fatong, and there are many grayish brown or dark brown mildew layers on the back of the diseased leaves, which are glued, showing near round brown disease spots of different sizes on the front of the corresponding leaves. The disease of young or overdense seedlings in summer and autumn is serious. Cuttings and young trees suffer less. However, the disease has not been found in the big tree.

Prevention and cure measures

1. Changing stubble sowing and raising seedlings or using cuttings to raise seedlings, continuous stubble sowing and breeding is strictly prohibited.

2. In autumn, the fallen leaves of bed seedlings were collected and burned to reduce the source of overwintering bacteria.

3. Chemical control: from late May to July, Bordeaux solution (1 / 2 / 200) was sprayed 2-3 times to the back of the seedling leaves.

Powdery mildew

Powdery mildew is a fungal disease that has been infected many times. It mainly harms the leaves and tender shoots, the diseased leaves wrinkle and twist into a mass, and the front and back of the leaves are covered with white powder layer. The disease generally began to occur from May to June. At the initial stage of the disease, small round spots of white powder appeared on the front or back of the leaves, and then gradually expanded, resulting in wrinkling, longitudinal curling, twisting and atrophy of the new shoots. When the occurrence is serious, yellow and white dots are formed in the white powder layer, and then gradually form yellowish brown or dark brown, causing the leaves to wither and fall off ahead of time.

Prevention and cure measures

1. Cut off the diseased buds, diseased branches and overdense branches in winter, make the crown ventilated and transparent, and remove the diseased leaves and shoots in time to reduce the source of infection.

2. Strengthen the management, strengthen the tree potential, increase the application of organic fertilizer and phosphorus and potassium fertilizer, and avoid the partial application of nitrogen fertilizer.

3. Spray prevention and treatment:

The main results are as follows: (1) after winter pruning, Baume 5 degree solution stone sulfur mixture is generally sprayed once.

(2) after the onset of the disease, 70% methyl topiramate wettable powder 800-1000 times and 15% triadimefon wettable powder 800-fold solution can be sprayed once every 7-10 days, continuously for 2 times.

(3) when it rains for a long time, the times of spraying should be increased appropriately, and spraying should be carried out in time after each rain to prevent the disease from spreading.

Tortoise wax scale

Trunk borer and the holes in the tree caused by it

Prevention and cure measures

1. Artificial physical control: trapping and killing adults, removing egg blocks, digging pupae and so on.

2. Biological control: control insects with insects and bacteria.

3. Chemical control: green Weilei capsule.

American white moth

Leaf-eating pests and their causing withered and yellow leaves

Prevention and cure measures

1. Artificial physical control: artificial removal, pupation of perennial grass, light trapping, trapping with traps.

2. Biological control: control insects with bacteria, poison and insects.

3. Chemical control: bionic preparation control, botanical insecticide control, other chemical control.

Conclusion: the lovely tree must be taken good care of, looking forward to planting a piece of Suzuki.

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