How to deal with common safflower star anise pests and diseases?

1.Fennel beetle:

The octagonal beetle, also known as the octagonal leaf beetle, is the main pest of the anise. Leaves and shoots are destroyed by larvae and adults. The larvae are infested from mid-March to mid-April, and the adult infestation period is from mid-May to mid-August.

Control methods: spray 40% dimethoate 800 times before the third instar larvae, or 800-1000 times of trichlorfon, 1500 times of trichlorfon, 2000-2500 times of kung fu, 1000 times of Lesbourne, 1000 times of 50% air powder, and 1000 times of quick killing.

2.Scale insects:

Scaleworms are divided into Cottonworm, Sagittal Spotted Scale, and Garden Brown Scale. They often gather in leaves, twigs, twigs and fruits, absorb sap, cause dead branches, leaf branches, induce soot disease, weaken the vitality of trees, and fall off after damage.

Prevention and control methods: (1) Strengthen cultivation management. In winter, the garden is cleared, pests and dead branches are removed, and burned intensively.

2) Drug control: 1000 times of quick killing, 1000-1500 times of gram knot, 2000-3000 times of xieba, 1000 times of imidacloprid.

3.Octagonal weevil:

The larvae eat the branches and eat them, so the top of the branch is charred and blackened, and the buds at the top of the trunk are affected first, seriously affecting the growth of the young tree. Adults lay eggs in the apical buds in autumn and winter. The larvae that hatch in February-March are damaged on the shoots.

The injured branch was more than 5 centimeters long, and the injured part turned black and died. The larvae survive for about a month and then pupate, and the pupa can emerge as an adult within 10-15 days.

Prevention and control methods: (1) In April every year, the tip of the injured branch is dry yellow at the beginning, and yellow when it is severe. At this point, the branch is cut 7 cm long, and the cut branch will kill the insects.

2) During the adult period, spray dimethoate 800 times, trichlorfon 800-1000 times, 50% pine borer 800 times, 50% wind guide disperse emulsifiable concentrate 1000 times, chloroform 1000-2000 times.

4.Sunburn: Sunburn is a non-communicable disease that occurs on young and strong anise trees.

Because the woodland has no shade, the bark of young trees will dry and crack under strong sunlight, affecting water absorption, and gradually withering from the bottom up. However, sudden exposure of adult trees that have been in a mixed canopy state for a long time can also cause sunburn.

Control methods: (1) Planting at the seedling stage or in the shade of trees. (2) The trunk is brushed with lime mortar, which is more suitable from June to August every year.

5.Soot disease:

Soot is a leaf disease caused by ascomycetes in fungi. The disease is transmitted by scaleworms and aphids in the process of absorbing the juice of star anise leaves. After the occurrence of the disease, a layer of black smoke is formed on the surface of the leaf buds, which affects the normal photosynthesis and absorption of plants.

Control methods: prune pest branches in winter and spring every year to control scales, aphids and other pests.

After the occurrence of this pest, we must actively spray pesticides, and you can also sprinkle some compound fertilizer, under the effect of fertilizer, it will also make the plant more tenacious, improve resistance, so that it can also resist pests and diseases.

Safflower star anise should be strengthened in the growth period when encountering pests and diseases, and pesticides need to be sprayed in time. Remove insects with a reasonable amount of medicine. to ensure the yield.

In the event of pests and diseases, be sure to clean up the rotten plants, re-put the nutrient soil, and then use chemical fertilizers and pesticides, so that they can be treated.

Pesticides. Because my family's safflower star anise has pests and diseases, I will use pesticides, and the effect is very good, so I have to use pesticides to deal with them.

At this time, you can brush lime mortar on the trunk, control the light time, reduce ultraviolet radiation, study the growth habit, water more, control the temperature difference, and use pesticides to control this pest and disease.

The most common pest and disease of safflower anise is star anise sunburn, and to prevent this disease, it is necessary to pay attention to shade in the early stage of star anise growth and not let the sun shine.

You can also add some pesticides or plants that can control insects around, which will have a good effect and protect safflower anise.

Pesticides. Because pesticides can be a good prevention and pests and diseases, pesticides should be used to prevent and control.

Spray some pesticides when the plants are growing to prevent insect infestations, which can be used as a spice.

The disease of the octagonal gold pan - yellowing.

Yellowing is a common disease of star anise. When yellowing occurs, the leaves fade and turn yellow. There are many reasons why star anise turns yellow, it can be an iron deficiency or something else. Generally, management should be strengthened, and reasonable fertilization should be applied to deal with yellowing.

The disease of the octagonal gold plate - leaf spot.

Octagonal leaf spot mostly occurs in summer, mainly harming leaves, resulting in the appearance and expansion of disease spots on leaves, and finally even leading to leaf wilting. Octagonal leaf spot is mostly caused by pathogens, and the spores of the fungus are spread by wind and rain. Generally, the octagonal gold plate is prone to disease in a high temperature and humid environment.

In terms of management, ventilation should be strengthened, more organic fertilizer should be applied, and the dead leaves of star anise should be destroyed in time. If leaf spot occurs, it can be treated by spraying some carbendazim solution. Font Coal Year Stain Disease is a very harmful disease, usually caused by bacteria.

The fungus can overwinter on diseased leaves, but it can also be spread by insect pests and rain, and it is easy to break out in the hot and rainy season in summer and autumn. Coal stain disease can damage the leaves and branches of star anise. When the potato is white, it is necessary to take the fog in time and spray some carbendazim solution for prevention and control.

The disease of the octagonal gold pan - coal stain disease.

Anthracnose can damage petioles and fruit stalks, making them appear as coarse lesions. When anthrax occurs, the diseased branches and leaves should be cut off in time, or chemical control should be carried out, and the agent should be sprayed in time. Two chemicals can be used for cross-spraying.

The insect infestation of the octagonal gold plate - red spider.

Spider mites are a common pest of anise. It mainly sucks the juice of star anise. In severe cases, the leaves will gradually turn yellow and fall off, affecting the growth of star anise.

If the octagonal gold plate is harmed by red spiders, it is necessary to remove dead leaves and fallen leaves in time and burn them. You can also spray chemicals to kill spider mites. It should be noted that the red spider itself has a strong resistance to pesticides, and it needs to be sprayed in time and changed frequently.

The drugs commonly used for erection are dichlorvos and dimethoate solution. In addition, natural enemies can also be used for control.

The insect infestation of the octagonal gold plate - aphids.

Aphids are also common pests of star anise. Aphids also suck the sap of star anise, causing the leaves of star anise to shrivel and curl, and in severe cases, even wilt or even die. Aphids can sometimes cause soot disease.

If aphids are found on the octagonal gold plate, they can be washed away by watering when the amount is low. Natural enemies, such as ladybugs, can also be used for control. If there are a large number of aphids, you can prepare some safe pesticides such as tobacco leaf water.

It is also possible to eat special insecticides, which can be sprayed with a solution of 1000 times dichlorvos emulsifiable concentrate.

The insect infestation of the octagonal golden plate - the red wax scale.

Adults and nymphs of the red wax scale often parasitize the branches and leaves of the star anise, sucking the sap of the star anise. It will cause the star anise plant to turn black, shrank and even die, and may also cause soot disease, which is very harmful. In the early and large stages of the occurrence of red wax scale pests, the pests can be eliminated and the leaves of the pests can be cut off for destruction.

Predators can also be used to control. If the drug is sprayed, it will also have a certain effect.

1.Anthrax.

It mainly damages the leaves, fruits and stems of star anise seedlings at the seedling stage. The onset of high temperature and humidity is severe. Prevention and control methods: select sandy loam soil with high and dry terrain and easy drainage as nursery; Before sowing, use 50% tobuzin or antibacterial special 200 times solution or potassium permanganate.

Soak the seeds for 20 minutes, wash them with water and dry them before sowing seeds; At the beginning of the disease, 1 1 120 Bordeaux solution or 25% carbendazim is used.

1000 times liquid control.

2.Octagonal soot disease mostly occurs in octagonal woodlands with high canopy density and poor ventilation. It is usually induced by scale insects or aphids.

Prevention and control methods: cut off insect branches and leaves in time to eliminate the source of insects; In the peak stage of pest hatching, spray with 40% dimethoate 1000 times; During the occurrence of soot disease, stone sulfur mixture is used to prevent and control it.

3.The larvae of the octagonal inchworm are the leaf damage, which occurs in March and November, and the damage is more serious in September and October. Control method: In the young instar stage of larvae (before 3 instars), use 90% crystalline trichlorfon 800 1000 times solution or 80% dichlorvos.

Emulsion 1500 times liquid control.

In addition, there are underground pests such as small ground tigers.