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Symptom Identification and Control Methods of Peach Gummosis
Peach gummosis is a disease commonly occurring on peach trees today, and it can be severe; especially in peach orchards with extensive management and weakened tree vigor, the incidence rate of affected trees can reach over 90%. This disease severely weakens tree vigor, affects yield and quality, and in severe cases leads to dead branches and dead trees, threatening the production and development of peach trees. It is also one of the most troublesome diseases for fruit growers. I. Causes of the disease. There are two causes of peach gummosis: one is non-infectious pathogens, such as mechanical injury, damage from pests and diseases, frost injury, freezing injury and other wounds
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How to prevent and control peach bacterial shot hole disease? Detailed methods
Peach bacterial shot hole disease is a widely distributed disease with a high incidence rate. Bacterial shot hole disease occurs in all peach-producing areas across the country, especially in coastal and lakeside areas, orchards with poor drainage, and in rainy years, where it often occurs severely. If not controlled in time, it easily causes massive leaf drop, reduces nutrient accumulation, and affects flower bud formation. It not only weakens tree vigor and reduces the current year's yield, but also affects the following year's fruiting, causing poor harvests. Besides harming peach trees, this disease can also infect various stone fruit trees such as plum, apricot and cherry. One
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What are the pollution-free control methods for the jujube looper moth?
The control principle is to make use of its characteristics of overwintering under the tree and the wingless female moth, strengthen control efforts under the tree, and eliminate or stop the female moths from climbing the tree to lay eggs. Large-scale control can reduce the insect population by 80%-90%. On this basis, to eliminate the larvae that slip through the net on the tree, pollution-free pesticides can be used for control. 1. Artificial pupa digging. Before the adults emerge in spring, turn the soil within 1 m around the tree and 15 cm deep to dig out pupae, collect the pupa clumps and dispose of them in a centralized manner. You can also deep-plow the tree in autumn to destroy its overwintering sites so that it cannot
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Occurrence and Control Methods of the Pear Yellow Pink Aphid
I. Distribution and Damage. It occurs commonly in the northern regions of China and only damages plants of the genus Pyrus. This pest mainly damages the fruit by adults and nymphs gathering at the calyx depression of pear fruits to feed, and it also damages other parts. The surface of the damaged peel initially shows small yellowish, slightly sunken spots, which later gradually turn black and expand outward in wavy rings, often forming cracked large black scars and even causing fruit drop. II. Occurrence Pattern. The pear yellow pink aphid generally has 8 to 10 generations per year, overwintering as eggs on fruit spurs, in bark crevices, under the raised bark damaged by the pear bark miner moth, and on debris attached to branches and trunks. The following
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Occurrence Patterns and Control Methods of Rabbit Necrobacillosis
I. Symptoms The sick rabbit loses its appetite, salivates, and develops hard nodules on the lips, oral mucosa, and gums, which then become necrotic and foul-smelling. The swellings sometimes occur on the neck, chest, face, or front of the chest, forming abscesses or ulcers. After the lesions rupture, a foul-smelling discharge flows out, and the course of the disease lasts as long as several weeks or months. The rabbit dies from elevated body temperature, emaciation, and exhaustion. II. Prevention and Control 1. Prevention: Rabbit cages should be free of sharp foreign objects to prevent biting and fighting and to prevent skin injuries. Rabbits should be bred and raised on the farm itself. Breeding rabbits introduced from other places must be isolated and quarantined for 1 month and may only be mixed into the group if they have no other diseases.
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What are the control methods for rose gray mold?
Gray mold mainly affects flowers and young shoots. After the flower buds are infected, at first there are small irregular water-soaked spots, and the lesions continue to expand until the entire bud becomes soft and rots. After the diseased buds wither, they hang above the diseased tissue. The pathogen also attacks the shoots from which flowers have been removed. Under warm and humid conditions, the diseased parts produce a large amount of gray mold. Control measures: 1. Remove diseased flowers promptly, remove withered old flowers, and burn them in a centralized manner. 2. For greenhouse cultivation, pay attention to ventilation and avoid excessively high humidity. 3. When disease occurs, spray 65% zineb wettable powder at 600 times dilution, 75% chlorothalonil wettable
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What are the control methods for southern blight in orchids?
Southern blight is caused by the fungus Selerotiumrolfsii, which harms the stem base and roots from seedlings to mature plants, and Cymbidium hybridum is more susceptible to this disease. When the disease occurs, white mycelium can be seen at the stem base, the stem base turns brown, the roots dry up, and a large number of small brown sclerotia form, causing the plant's stem base to soften and die. This pathogen has a very wide host range and causes more serious damage to bulbous flowers and perennial flowers. It also has strong saprophytic ability and can survive for a long time in the substrate or old pots through sclerotia. This fungus can also infect Phalaenopsis
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Causes and Control Methods of Leaf Yellowing in Winter Red Fruit Bonsai
Winter red fruit flowers easily and has a high fruit-setting rate. Its fruits are entirely red, and the fruiting period can extend to the next year's flowering and leafing stage without dropping. It is an excellent variety for fruit-viewing bonsai and is deeply loved by the people. However, during cultivation, due to the limitation of pot capacity and other influences, the leaves often turn yellow and drop. The main causes of yellowing are as follows: Temperature. Winter red fruit prefers warm and humid conditions and likes light but not excessively strong light. Especially in hot summers, strong direct sunlight will make the air dry and raise the pot soil temperature.
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Control Methods for the Ligustrum Looper Moth Damaging Ornamental Garden Trees
Distribution and Damage The ligustrum looper moth Naxa seriaria Motschulsky, also known as the lilac looper moth, belongs to the order Lepidoptera, family Geometridae. It is distributed throughout Northeast, North, Northwest, Southwest and East China. The larvae damage Syringa reticulata, Syringa pekinensis, Syringa reflexa, Syringa oblata, Syringa wolfii, Syringa oblata var. alba, ligustrum, large-leaved ligustrum, osmanthus, camellia, tea, privet, Manchurian ash and Chinese ash, etc. The larvae gather in groups to feed on leaves and often strip the leaves completely. The larvae have the habit of spinning silk to form webs; in severe cases the webs cover the tree crown,
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What to Do About Root Rot in Golden Privet? A Detailed Guide to Effective Prevention and Control Methods
To prevent root rot, pay attention to the following points: 1. Do a good job of disinfecting the seedbed. Avoid using land that has previously been sown or used for cuttings of similar seedlings as a seedbed. 2. Do a good job of disinfecting the cuttings. After cuttings are inserted, the entire seedbed should be disinfected; generally, the branches can be soaked directly in thiophanate or carbendazim solution, which gives a clear disinfection effect. 3. Pay attention to rooting time. Golden privet is a plant of the Oleaceae family that roots very easily; its cutting method can follow that used for golden-leaf privet, with attention to management and timely spraying of medicine to prevent disease. 4. Open
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