-
How to deal with root nodule disease in cherry blossoms? Detailed explanation of prevention and control methods
Last spring, when planting cherry blossom seedlings, the author found that the roots of some plants had nodular growths. Their symptoms were varied in shape and size, brown to dark brown in color, with rough surfaces, and some showed cracked patterns. The affected areas were on the ground or near the root crown at ground level, and at the graft union between the rootstock and the scion. Affected plants showed poor growth and stunting. After identification and diagnosis, the author believes this is root nodule cancer disease, and the seedlings should be treated before planting. The methods are: 1. For suspicious seedlings, soak the roots in a 1% copper sulfate solution for 5 minutes,
-
Control Methods for Spider Mite Damage on Cherry Blossoms
How to control the damage caused by spider mites to cherry blossoms? The spider mites that harm cherry blossoms are mostly hawthorn spider mites, also known as hawthorn red spider mites. Spider mites mainly damage cherry blossom leaves. In early spring, the adults and nymphs gather on the undersides of leaves, piercing their mouthparts into the leaf tissue to suck sap, causing the damaged leaves to show chlorotic spots; in severe cases, the leaves scorch and drop early. The female adult of the hawthorn spider mite is 0.5 mm long, oval in shape, with a total of 26 setae on its back. The body is red, with winter and summer forms: the winter form is bright red with a silky sheen; the summer form is red when molting, and after feeding
-
What are the control methods for cherry root cancer?
How to control cherry root cancer? The tumor at the root crown of cherry is caused by a bacterium of the genus Agrobacterium, known as cherry root cancer. The most obvious symptom of this disease is the formation of spherical or hemispherical tumors at the root crown. In the early stage, the tumors are white and soft, then gradually enlarge and become lignified. The surface of the diseased tumors is rough, brown or dark brown. Cherry root cancer often causes poor growth of the aboveground part of the plant, yellowing of leaves, and in severe cases, plant death. The pathogenic bacteria of cherry root cancer survive and overwinter in the surface layer of the tumors of diseased plants and in the soil. When the surface layer of the tumors is decomposed
-
What are the control methods for cherry root gall disease?
The gorgeous cherry blossom is deeply loved by people, but it is prone to a deadly root gall disease. This disease mainly occurs on the roots and on the trunk and side branches of the aboveground part of the cherry tree. In the early stage of the disease, the root crown swells into spherical or hemispherical tumor-like growths; young galls are white, soft in texture, and smooth on the surface. Later the galls gradually enlarge, become hard in texture, brown or dark brown, with a rough, cracked surface, and spread gradually from the root crown to the main root, lateral roots, and even fibrous roots, with each node swelling into tumors of varying sizes, causing the cherry tree to grow slowly or even stop growing, and the whole tree dies within 3 to 5 years
-
How to Effectively Prevent and Control Cherry Blossom Brown Spot Shot Hole Disease
I. Symptoms: Shot hole disease can be divided into fungal and bacterial types. Cherry blossom brown spot shot hole disease is caused by fungi. It mainly damages leaves and also infects new shoots. It usually starts from the lower part of the canopy and gradually spreads upward. In the early stage of the disease, needle-tip-sized purplish-brown small spots are scattered on the upper side of the leaves, later expanding into round or nearly round lesions 3-5 mm in diameter. The edges of the brown spots are purplish-brown, and grayish-brown mold spots appear on the lesions in the later stage. An abscission layer forms at the edge of the spot, and the lesion dries up and falls off, forming shot holes. II. Disease Pattern: The pathogen of cherry blossom brown spot shot hole disease overwinters in diseased leaves or shoot parts
-
How to prevent and control bacterial shot hole disease and brown spot shot hole disease on cherry blossom leaves?
How to prevent and control bacterial shot hole disease and brown spot shot hole disease on cherry blossom leaves? Small shot holes often appear on cherry blossom leaves, and in severe cases they cause the leaves to turn yellow or even drop. This is caused by bacterial shot hole disease and brown spot shot hole disease of cherry blossoms. (1) Bacterial shot hole disease of cherry blossoms: It mainly harms cherry blossom leaves. In the early stage of the diseased leaves, light brown water-soaked small spots appear, which gradually form nearly round brown or purplish-brown lesions surrounded by light yellow halos. In the later stage, the lesions dry up and fall off, forming shot holes. The pathogen of bacterial shot hole disease of cherry blossoms is a species of bacterium in the genus Xanthomonas.
-
What are the control methods for trunk-boring pests of cherry blossoms?
The longhorn beetles that harm cherry blossoms usually include the star longhorn beetle, the glossy-shouldered star longhorn beetle, and the peach red-necked longhorn beetle. 1. The star longhorn beetle has 1 generation per year. When adults emerge from late May to early June, capture the adults: before the star longhorn beetle adult lays eggs, it first bites a notch about 2 mm deep and about 8 mm long in the bark in the shape of a "" or "", and then lays eggs inside it. During the peak egg-laying period in mid-to-late July, search for the notches on the trunk and destroy the eggs. During the stage when newly hatched larvae are active in the cortex, use a grafting knife to pick the larvae out. For larvae that have bored into the xylem, it is necessary to
-
How to Grow Cherry Blossoms So They Bloom Like Clouds and Rosy Clouds
Cherry blossoms are famous ornamental flowering trees that bloom in early spring. They are extremely beautiful; at peak bloom, the whole tree is a riot of flowers, like clouds and rosy clouds. Strengthen management measures to make cherry blossoms bloom abundantly and gorgeously. 1. Fertilizing should be appropriate. Cherry blossoms are fertilized twice a year, and acidic fertilizers are best. One is winter fertilizer, applying organic fertilizers such as soybean cake, chicken manure and decomposed fertilizer in winter or early spring; the other is after the flowers fall, applying quick-acting fertilizers such as ammonium sulfate, ferrous sulfate and superphosphate. 2. Pruning and care. Pruning mainly involves cutting off withered branches, leggy branches, overlapping branches and diseased and pest
-
Cherry Blossom Spring Planting Methods and Key Technical Points
These past few days, the cherry blossom I grow in a pot at home had just grown a few leaves when it suddenly wilted badly. Why? Reply: This kind of problem may be caused by poor control of fertilizer and water, and it is also related to the planting season. For cherry blossoms, May to June and September are best, and sandy loam soil that does not contain brick or stone is preferable. 1. Watering: Cherry blossom roots are shallow and not tolerant of drought. During the growing period, they must not lack water, especially during the dog days of summer, otherwise they will bloom less. However, too much water and fertilizer makes waterlogging especially easy, and it also easily causes excessive vegetative growth, an untidy plant shape, and affects the overall effect, so watering should be kept at the right level.
-
What are the control methods for the main pest mites of Sichuan cherry blossoms?
In the Mianyang area of Sichuan, the mites harmful to cherry blossoms are mainly the European red mite (Panonychus ulmi), the hawthorn spider mite (Tetranychus viennensis), and others. The larvae, nymphs and adult mites suck the leaf sap; the damaged leaves develop many small chlorotic spots, and in severe cases the leaves turn pale and scorch, which not only affects plant growth and flowering but also affects photosynthesis. Morphological characteristics: the female adult of the European red mite is 0.45 mm long and 0.29 mm wide, round, with a raised back, dark red; the male adult is 0.3 mm long. Summer eggs are orange-red, winter eggs dark red.
条件筛选