Wetland pine diseases, introduction of wetland pine

The most important characteristics of P. marshlandensis are: strong adaptability to temperature and soil, and more resistant to wetlands; Low temperature resistance, poor ridge resistance, neat tree shape, straight and straight main pole, neat and not bulky side branches.

The best environmental conditions for the growth of wetland pine: rainfall of 1000-1400mm, annual average temperature, absolute maximum temperature of 38, occasionally reaching 41, absolute minimum temperature of -17. It can be planted in the Yangtze River basin and in the south of the region.

P. marshlands grows well in neutral to strong acidic soil erosion, red soil, hilly land and iron nodule layer under 50 to 60 cm of topsoil, and poorly drained sandy clay soil. Wetland pines are also more drought-tolerant and can thrive in arid and barren low-hilly areas. Growth is worse on well-drained sandy or waterlogged ground.

Wetland pine is a light-loving tree species, which is extremely shade tolerant and has strong wind resistance. The root system has mycorrhizae to live in symbiosis with it.

Pinus elliottii is a fast-growing evergreen tree, native to the southeast coast of North America, Cuba, Central America and other places, and prefers to grow in moist soil at an altitude of 150-500 meters. Wetland pine trees are quite beautiful, the leaf shade is thick and wide, suitable for planting on mountain slopes, streamside ponds, can be planted in clusters, and is also suitable for gardens, grassland solitary planting, cluster planting as shade trees and background trees.

Wetland pine is a good universal landscaping tree species, it is drought resistant and hard-working, barren, has good adaptability and stress resistance, so it is widely distributed in the world, and a large area of land south of Shandong Province in China is suitable for planting; It is also a good economic tree species, with high yields on both pine resin and timber. It is also suitable for landscape forests and soil and water conservation forests.

The method of planting marsh pine is as follows:

1. Planting method: Carefully tear off the film of the nutrient bag when planting, and keep the soil of the nutrient cup intact and not loose. Be careful not to pinch the nutrient cup soil dough, otherwise it will affect the root growth of seedlings.

When planting, it is necessary to achieve "root Shu, seedlings are positive, and tight", the seedling body should be straight, the surrounding of the seedling should be compacted with broken soil, and the soil cover should be higher than the nutrient cup.

2. Check and fill the gaps: within 10 days after planting, carry out 1 or 2 inspections and replenish seedlings, timely support the seedlings buried by sand, and replant the pests, rodents and omissions to ensure that the survival rate of afforestation in the current year is more than 95%. After afforestation, the mountain should be closed for 2 to 3 years to prevent livestock from entering the forest and trampling on the seedlings.

3. Tending technology management: After afforestation, it is generally necessary to tending for 2 to 3 years.

The first year of tending: 6 to 8 months after planting, the main work is weeding, weeding, weeding, fertilization. Remove weeds within a meter diameter around the tree tray and cut down shrubs that grow too fast in the woodland.

The first fertilization distance from the seedlings 30 40 cm to open two small shallow ditches (each seedling to open two 50cm 20cm furrows), apply compound fertilizer kilogram plant, fertilization after covering soil.

Clause. In the spring of the second and third years, they were raised once. The main work of tending is weeding, loosening the soil, and fertilizing. Clause.

Second, three fertilization from the seedlings 40-50 cm to open two small shallow ditch, apply compound fertilizer kilogram plant, fertilization after soil cover or appropriate soil.

4. Pest control: The incidence of pests and diseases of wetland pine is relatively low, and the degree of harm is relatively small, which generally occurs in a small area and does not need to be controlled.

Main leaf-eating pests: Masson pine caterpillar, pine borer, pine poison moth, etc. Prevention and control methods:

Before and after the Spring Festival every year, spray the overwintering insect generation to reduce the source of insects; Or when insect pests appear, spray with medicine. The main prevention and control drugs are: enemy killing, chlorfon, chlorouret No. 3, avesol, Sendebao and so on.

Main diseases: pine shoot blight, needle rust. It mostly occurs in the young forest stage, and the prevention and control is based on the principle of prevention.

After the tip blight is found, the needles and branches that are affected by the disease should be removed and burned, and chemical drugs should be used to prevent and control it if necessary. Prevention and control drugs: methyl tobuzin, chlorothalonil, etc.

5. Mid-to-late management: The focus of mid-to-late management is mainly forest protection and fire prevention, at this time, the diameter of the wetland pine at breast height generally reaches more than 105 cm, and the degree of canopy in the woodland is higher, once the consequences of forest fire will be unimaginable, so fire prevention is particularly important. At this time, the side branches of the lower layer of the wetland pine have basically dried up, and the dry side branches can be knocked out if conditions permit, which is also helpful for fire prevention.

A mole cricket (earth dog, ground dog).

It belongs to the class Insectidae Orthoptera. Biting off the young stems of seedlings from the roots of wetland pine seedlings and digging tunnels will cause a large area of death.

Prevention and control methods: take 100 kg of rice bran fried fragrant spread cold, add 2 kg of dilution of 90% crystal trichlorfon, mix well with rice bran until the hand hits into a ball, in the windless and sultry evening in the woodland separated and spread, each pile of peanuts size 1

2 grains, the dosage is 2 kg per mu, and the insecticidal effect is good. The same method was adopted for forest land with high population density, and the prevention was carried out once before planting pine seedlings in the wetland.

Two big crickets. It belongs to the class Insecta, the family Orthoptera Moth. People come out to feed after night, and each insect can harm several seedlings in one night, and 3 after planting

Seedlings within 5 months are seriously harmful. Crickets bite the middle and lower parts of the plant, and the main stem or tip branches are broken, and the broken twigs, shoots, and seedlings are often dragged back to the hole for storage.

Control method: 1 day before planting, spray 1000 times of insect seal solution on seedlings, if the liquid is not washed by rain within a few days, it can kill the moth that is harmful to the tree. In places with high insect density, talc can be placed in a ratio of 50:1 before and after planting.

Powder with 25% dichloride stock solution is stirred evenly to make medicinal powder, and the medicinal powder is sprayed on the forest ground in the evening on a sunny day, and used per mu.

Quantity in kilograms. In addition, manual killing can be carried out, and after nightfall, you can bring a flashlight to the woodland to hunt and kill the crickets that are harmful to the hole.

3. Termites belong to the class Insecta, Isoptera, Rhinosa, Termiteidae or Termitidae. Yunnan Province is common with yellow-breasted, black-breasted scattered termites, and black-winged soil termites. In late spring, summer and autumn, termites swarm to hundreds to feed on all the tender roots and topsoil under the marsh pine.

The taproot cortex below centimeters, with only the woody convolut, dies quickly after losing water. Some use the protection of mud cover channels to endanger the cortex and xylem of plants; After termites eat suitable parts, they transfer and spread to adjacent plants in the soil layer and continue to cause damage.

Prevention and control methods: Before afforestation, the container seedlings were treated with 1000 times of 40% 50% phosphine or 407% Lesburn 1200

1500 times the solution, choose one of the soil soaked in the container seedlings after planting, can also be placed at the bottom of the container 5 when planting

10 g carbofuran 3% granules; After planting, if the effect of rain erosion is lost, and termite damage occurs, the drug dilution of the treatment container seedlings is used, packed into a hand-cranked sprayer, the nozzle is unscrewed, and the rhizome of the wetland pine is aligned, and the tonic is made one by one, about 20 ml per plant, and the amount of medicine is appropriately increased for the large seedlings of the wetland pine.