The prevention technology of common pests in pasture

Insect pests in pastures refer to abnormal growth or development of pasture caused by some harmful insects that invade pastures, resulting in decreased grass production and seed yield and disasters. The most common pasture pests in our province are the following:

1. Locusts: Aphids are harmful to pastures of almost all families. The main site of attack is the delicate part of pastures. Due to the biting of aphids and the absorption of pasture nutrition, the tender stems and young leaves of forage grasses are curled. Causes the leaves to yellow or even fall off, thereby affecting the photosynthesis of pastures, inhibiting the growth of pastures, and reducing the grass production of pastures.

Control methods: spraying low-toxic dimethoate can achieve better control effect. Use a 40% dimethoate emulsion to add 1000-1500 dilutions of water and spray. To increase efficacy, spray should be selected when there are no weather conditions. Animals are forbidden to feed the animals within 7 days after spraying the herbicide.

Second, the blind elephant. Blind stinkbugs mainly harm legumes and grasshoppers, and they are most important to victims. Blind stink bugs mainly harm the buds of pastures, often causing the buds to wither and wither, which reduces the seed setting rate of forage grass seed fields, which not only results in a decrease in seed yield but also affects the quality of the seed.

Method of prevention and cure: The method of timely cutting can be adopted for field grasses with insect pests. After harvesting, hay is prepared or fed directly to livestock and poultry. When the harm to seed fields is not serious, 50% of dichlorvos emulsions can be sprayed during the flower buds of pastures. 1000-1500 dilutions.

Third, leaf miners. Legumes are common to this pest. The leaf larvae of the leaf miner often sneak on the epidermis of the plant, causing great damage to the blades of the pasture, resulting in the formation of white, linear tunnels in the leaves, the tunnel expanding to yellow leaves, reducing the photosynthesis of pasture, and causing a decline in forage production.

Control methods: 40% of Dimethoate emulsion 3000-5000 dilution can be used for spraying.

4. Mythimna separata: In the summer of high temperature and high humidity, the pests are easy to appear. The main hazard is gramineous pasture. The pest mainly devours the leaves of forage grass. The prevention and control are not timely, and the leaves of pasture grass can be eaten within a few days, which will bring great harm to the production of forage grass.

Control methods: The prevention and control of armyworm can use artificial culling and drug control methods. The method of culling is based on the characteristics of adult armyworms, which are moths that graze into the grass during the day. In pastures, grass is plucked with wheat straw and inserted into the ground. The grass is removed every day and burned with fire. The moth or the moth can be trampled to death to eliminate the armyworm by this method of destroying the adult. The use of pesticides to control is mainly scattered with stick insects scattered, each 0.067 hectares of the amount of 1.5-2.5 kg, in order to improve efficacy can be used as soon as possible, to eliminate it as much as possible in the larvae, to prevent the proliferation of adults.

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