What viruses does red leaf heather generally have?

The meaning of planting a red-leaved heather tree is: 1. The red-leaved heather tree symbolizes majesty and solemnity. We planted red-leaved heather trees on both sides of the city's roads and guarded our common home like soldiers.

2. The red-leaved heather tree symbolizes family harmony and a prosperous life. Because of its bright red leaves and changing colors, the red-leaved heather tree has a high ornamental value, and many people choose to plant it in their yards.

Red-leaved heather is a hybrid of the Rosaceae family, which is a small evergreen tree or shrub with a height of up to 5 meters and a shrub up to 2 meters high. Leaves leathery, oblong to obovate, lanceolate, leaf ends acute, leaf base wedge-shaped, leaf margins with glandular serrations, flowers numerous and dense, inflorescences of the compound umbel, flowers white, pear fruit yellow-red, flowering in May-July, fruiting in September-October.

The red-leaved heather is a street tree, and its pole stands like a torch; Make a hedge, which lies like a fire dragon; Pruning and landscaping, the shape can be varied, and the landscape effect is beautiful. Red-leaved heather gets its name from its bright red shoots and young leaves.

There are two common varieties, red robin and red lips, among which red robin has bright and eye-catching leaves and is more ornamental. In spring and autumn, the new shoots and young leaves of red-leaved heather are fiery red, the color is bright and long-lasting, and it is very vibrant. In the summer heat, the leaves turn bright green, giving a fresh and cool feeling.

Red-leaved heather gets its name from its bright red shoots and young leaves. <>

1. Symptoms The disease is a physiological disease, which mostly starts at the bud stage and flourishes at the boll stage, and the diseased leaves develop from top to bottom and from the outside to the inside. In the early stage, the leaf edges become yellowish-brown, the mesophyll tissue fades green, and the veins remain green. Later, the leaf color gradually changes from yellow to purple-red, the mesophyll becomes thicker, and the leaves shrink and become brittle.

In severe cases, the base of the petiole becomes soft, loses water and dries up, causing the leaves to wilt and droop, and finally dry up and fall off. At the same time, a large number of bud bells fall off, the root system is underdeveloped, the taproot is short and thin, the fibrous roots are few, the color is dark brown, and the root tips turn black.

2. Prevention and control methods.

Soil improvement: intensive cultivation to improve the soil and improve the soil's water and fertilizer retention capacity.

Reasonable fertilization, re-application of base fertilizer, and skillful application of top dressing to prevent cotton plants from defertilizing in the later stage. Do light application of seedling fertilizer, skillful application of bud fertilizer, heavy application of flower bell fertilizer, and supplementary application of cover fertilizer.

Foliar spraying of 600 times cotton special type "Tianda-2116" solution, 3-4 times, to improve the plant's disease resistance, drought resistance, waterlogging resistance and other stress resistance, the effect is very good.

Reasonable drainage and irrigation, suitable cultivation. Pay attention to timely cultivation, irrigation, and ditching and drainage in the rainy season.

Cool Shadow mode, you know.

Botrytis infestations the young branches, young stems, leaves, flowers and fruits of red-leaved heather. The lesions initially appear as water-stained dots, then expand into large gray spots with irregular wheels, and finally infect the affected area with a gray mold layer until necrosis or decay. Strengthen management at ordinary times, pay attention to the elimination of stagnant water, reduce humidity, and remove sick and disabled bodies.

Before the occurrence of the disease or in the early stage, choose to choose a windless and sunny day to spray with Qilin Shixun.

Leaf spot disease mainly damages its leaves and stems, and when the leaves are damaged, small brown spots appear first, and then gradually expand and develop into polygonal lesions. The lesions are reddish-brown on the front of the leaves and yellow-brown on the back, and when the disease is severe, the lesions can be connected into lumps, or even the whole plant dies. Strengthen fertilizer and water management, enhance the growth potential of trees and their own disease resistance, and choose to spray with Qilin Qihu before or at the beginning of the disease.

Anthrax is one of the main diseases that occurs during the cutting of red leaf heather, mainly to the new leaves that have just emerged. It is easy to occur under the environmental conditions of high temperature, humidity and poor ventilation, which is easy to cause the situation that red leaf heather only takes root and does not germinate. Before the occurrence of the disease or in the early stage, the foliar spray is evenly sprayed with Qilin Seimli, and when the disease is more serious, it should be used again every 7-10 days, and the effect is better when it is planted with large and strong.

Occurrence and prevention of gray mold of red leaf heather.

Botrytis botrytis mainly occurs on the stems, leaves, flowers, fruits and branches of plants, and is characterized by water-stained small spots at the beginning of the disease, which gradually expands into large black spots and is irregular in the shape of a wheel, and the diseased parts continue to expand until they decay.

When the seedlings are erected, it is necessary to pay attention to the timely removal of stagnant water, reduce the humidity, and clean up in time when the situation is found, and it can also be sprayed with pesticides.

Red leaf heather leaf spot disease and its control.

The harm of leaf spot disease to stems and leaves is mainly that small spots appear first, and then gradually expand, the front of the leaves is reddish-brown, and the back is yellow-brown.

Timely removal of fallen leaves, removal of pathogens, spraying for prevention.

Red leaf heather is a collective name for the hybrid species of heather in the family Rosaceae, which is a small evergreen tree, named for its new shoots and bright red young leaves. There are two rare varieties of red robin and red lips, among which the red robin has bright and dazzling leaves and is more ornamental. In spring and autumn, the new shoots and young leaves of red-leaved heather are fiery red, the colors are bright and durable, and they are very vibrant.

In the summer heat, the leaves turn bright green, bringing a fresh and cool feeling in the hot summer.

The red leaf stone barrel grows fast, and has strong germination, is resistant to pruning, and can be cultivated into different tree shapes according to the needs of the garden, and has a wide range of uses in landscaping. The one- to two-year-old red-leaved heather can be pruned into dwarf shrubs, planted as ground cover plants in landscaping, or combined with other color-leaved plants to form various patterns; It can also be cultivated into a small tree with a single stem that is not obvious and clumped, and is planted into a large hedge or curtain wall, and is applied in residential areas, factory green spaces, streets or highways in green isolation belts. Red-leaved heather can also be cultivated into a single-stem, spherical canopy tree, planted alone in green space, or used as a street tree, or potted in porch and indoor arrangement.

Red leaf heather has strong adaptability: low temperature resistance, short-term resistance to low temperature above -25 (ground seedlings), poor soil resistance, good growth in slightly acidic and slightly alkaline soils, strong stress resistance, wide range of adaptability, from the south of the Yellow River to Guangdong, can grow normally, less pests and diseases, compared with China's native heather, it shows a strong hybrid growth advantage. It has a fast growth rate, a high germination rate, leafy branches, and is extremely resistant to pruning.

Innocuity... Its new shoots and young leaves are bright red and lasting, gorgeous and eye-catching, the fruit inflorescence is also red, in autumn and winter, red and green alternately, very ornamental value, it is a rare red leaf series in the greening tree species.

Red-leaved heather can also be cultivated into a single-stem, spherical canopy tree, which can be used as a street tree or a solitary tree as a shade tree in green spaces.

It can also be potted on porches and indoors. It has strong resistance to sulfur dioxide and chlorine, has sound insulation function, and is suitable for neighborhood, factory and mine greening.

This is not a disease, it is an aphid infestation.

Aphids, also known as greasy insects or honey worms, etc., are concentrated on the young shoots, young stems or young leaves of red leaf heather with adult aphids or aphids, and suck the sap of plants with needle-like stinging mouthparts, which is the leaf curled and shrunk to the back, which directly affects the growth and ornamentality of red leaf nanmu. In addition, it can also cause coal stain disease.

Aphids reproduce in large quantities and are prone to disasters during the dry season. Generally, when the temperature rises in spring, it is controlled with 10% dimethoate emulsion 1000 times or malathion emulsion 1000-1500 times or dichlorvos emulsifiable concentrate 1000 times.