What is the best way to deal with podocarpus insects?

Aphids swarm on the young shoots and the back of the young leaves of podocarpus to suck the sap, so that the young shoots grow poorly, the leaves become smaller, the leaf color turns yellow, and the tree weakens.

Morphological characteristics. The wingless parthenogram is reddish-brown or reddish-purple, oval. It is about millimeters long and millimeters wide. The antennae are elongated. Clause.

The first and second sections are smooth, and the third section is not a ring of sensation 39 42. The ventral canal is truncated and located on a brown cone. The caudal piece is papilloid and prominently protrudes from the ventral end.

Life history and habits.

The podocarpus new-leaf aphid overwinters on its branches with its eggs. In April of the following year, the overwintering eggs hatch into a dry mother, and the dry mother is harmed by the aphids gathered on the new shoots, and the dry female is produced after maturity, and the dry female reproduces on it for several generations, and reaches the peak of reproduction in May and June, and the damage is the most serious. After July, due to the high temperature, the insect population density decreased significantly, and the insect population rose again after the autumn cool.

Female and male aphids are produced in October, and eggs are laid after mating, and then the eggs are used for overwintering.

Prevention and control methods. 1. In early spring, when the podocarpus has not yet germinated, spray Baume 1 3 degree stone sulfur mixture solution to kill the overwintering eggs.

2. After the overwintering eggs are completed in late April, if the aphid begins to damage 2, spray 1500 2000 times of 40% oxymethoate emulsifiable concentrate; 50% anti-aphid wettable powder 600 800 times liquid poisoning.

Spider mites: Spider mites are susceptible to damage in the high temperature and dry season in summer, mainly concentrated on the leaf veins and young branches, and will suck the sap, resulting in small spots on the leaves, and in severe cases, the entire leaf surface.

When podocarpus.

Scale insects occur.

At that time, it can be sprayed with 1000 times of 50% pine molten EC or 1500 times of 40% dimethoate EC, and maintain a suitable growth environment. When podocarpus occurs red spiders.

At that time, put a few drops of dicofol or dimethoate on the branches and leaves, and maintain a ventilated environment to receive appropriate light conditions.

Scale insects are one of the most important insect pests of podocarpus, and when they occur, they will gather on the branches, leaves, and stems of podocarpus to suck the sap for survival. As the disease continues to expand, it gradually causes the branches and leaves to wither and fall off, which will seriously cause the branches to wither or the plant to die.

Prevention and control methods. For the occurrence of scale insects, first of all, we should not be anxious. If the disease is mild, the insect leaves can be removed and disinfected to maintain a suitable environment.

If the disease is severe, it can be sprayed with 1000 times of 50% pine molester.

Spider mites are very small and are one of the main pests of podocarpus. When there is a red spider infestation, it can be difficult to detect without looking closely. It often pierces the leaves with its mouthparts to suck the sap and make chlorophyll.

It is damaged, and finally causes the branches and leaves to turn yellow and fall off.

Prevention and control methods. For this pest control, some of the leaves can be removed first, and then some of the branches and leaves can be pruned and burned. Then add a few drops of dicofol or dimethoate to the branches and leaves, maintain a ventilated environment, and receive appropriate light conditions.

Symptoms: There are oval, elongated light reddish-brown lesions on the leaves, surrounded by a green ring, which then expands into irregular large patches, and produces black spots on the lesions.

Prevention and control methods: remove diseased leaves in time and spray pesticides in time. It can be sprayed with 500 times of 50% Tobuzin wettable powder.

Symptoms: small brown patches appear on the leaves at the beginning of the disease, and then expand into round or oval shapes. The lesions gradually dry up, and in severe cases, the whole plant is infestation.

Prevention and control methods: First of all, open windows for ventilation to reduce indoor air depression and humidity. Then spray with 1000 times of 70% thiophanate-methyl wettable powder, or spray 70% methyl tobuzin 60% anthrax fome, multibacteria, etc., to prevent the disease from continuing to spread.

Symptoms: Podocarpus is harmed by red spiders, the leaves fade, the chlorophyll is damaged, and dense small yellow spots and small yellow spots appear on the surface, and gradually shrink, yellow, wither, and fall off in severe cases, losing its due ornamental value.

Prevention and control methods: Spider mites often hide on the back of branches, leaves or dense places, pull the net to hide, and it is easier to catch manually.

If it is treated with chemical agents, it can be sprayed with 20% trichlorodiol emulsion, adding 800-1000 times of water to make a solution, and this drug has a good killing effect on adults, nymphs and eggs. It can also be sprayed with 50% dichlorvos emulsion by adding 1000-1500 times of water to make a solution.

Disease manifestations: The harm is very widespread, sucking the sap of stems and leaves, resulting in poor plant growth, and even inducing coal stain disease, resulting in large-scale damage to leaves. It has an earlier prevalence than spider mites and often breeds in large numbers in early spring.

Prevention and control method: When the number is small, it can be removed with a brush. In addition, it can also be sprayed with 800-1000 times the liquid of rapid culling. Mixing a certain amount of carbofuran in culture soil has a preventive effect, but the effect is only 3 months.

1. To deal with scale insects, you can spray 1000 times of 50% pine borer emulsifiable concentrate. 2. To deal with red spiders, you can drop a few drops of dicofol or dimethoate on the branches and leaves to kill them. 3. Rice-leaved podocarpus is one of the top ten podocarpus species, which looks like a small tree and is a common bonsai tree species.

4. The leaves of Pinus sinensis are short and dense, the growth is compact, and the branches are more shapely, and it is often used for miniature bonsai.

1. What pesticides are used to kill insects?

1. Scale insects.

1) Scale insects are one of the most important insect pests of podocarpus, and when scale insects occur, they will gather on the branches, leaves, and stems of podocarpus to suck the juice. As the disease worsens, it will cause the branches and leaves to wither and fall off, and in severe cases, it may cause the branches to wither or the plant to die.

2) When the onset is relatively mild, the insect leaves can be removed and disinfected, and when the disease is severe, it can be sprayed with 1000 times of 50% pine moth emulsifiable concentrate.

2. Red spider.

1) Spider mites are also one of the main insect pests of podocarpus, it is very petite, and it is difficult to detect when insect infestations occur. Spider mites use their mouthparts to pierce the leaves and suck the sap, which destroys the chlorophyll of the leaves, and finally causes the branches and leaves to turn yellow and fall off.

2) When controlling spider mites, first remove some insect leaves, then prune some branches and leaves, and burn them. After that, a few drops of dicofol or dimethoate can be added to the branches and leaves, and then the pest can be eliminated by maintaining a ventilated environment and receiving proper light.

Second, what varieties of podocarpus are good?

1. Rice leaf podocarpus.

Rice leaf podocarpus is one of the top ten podocarpus species, its appearance looks like a small tree, the leaves are small and beautiful, it is a more precious and excellent variety, mostly used for horticultural ornamentation in the viewing garden, is a common bonsai tree species.

2. Podocarpus chinensis.

The leaves of the podocarpus are short and dense, and the growth is very compact, and the branches are high and low, and they are relatively shapely. Its newly grown leaves are light in color and gradually grow into a deep green, and the inlays between the leaves are very beautiful, and they are often used in miniature bonsai.

3. Pearl podocarpus.

The pearl podocarpus has a long history of cultivation, its leaves are relatively short and dense, the root system is very developed, and it is also full of small nodules, which are not common in nature.

4. Island podocarpus.

The appearance of the island podocarpus is more peculiar, like a dragon like a beast, the branches are very elegant and shapely, like an elegant ribbon, there is a kind of green valley, smart beauty, is a more popular variety.

5. Red bud pearl podocarpus.

Red bud pearl podocarpus is a mutated variety, which is relatively rare, and is mostly used as a viewing plant in bonsai gardens. It is very ornamental, with new leaves bright red in color, which then slowly age.

6. Taiwan podocarpus.

Taiwan podocarpus is produced in Taiwan, is a common local bonsai podocarpus, it is evergreen in all seasons, the color is bright and green, and it is very dazzling in the sun. Its leaves are oval, the veins are clear, the flowering period is from March to May, and the flowers are yellow-green.