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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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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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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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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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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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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 control the jujube gall midge? Mastering these methods is key
Because the various life stages of this insect are relatively small, manual control is somewhat difficult, so chemical control is generally used, as follows: (1) Ground control: when the jujube buds are about to sprout (around mid-April), before the overwintering adults emerge, spray the ground under the tree canopy with 2.5% trichlorfon powder, or 25% phoxim capsule formulation at 200-300 times dilution (cover with fine soil or lightly hoe and loosen the soil to mix evenly), or 4% acephate powder, or 4% dibrom powder, all are acceptable; where there are seedling beds between the rows, spray the ground at the same time.
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A Detailed Explanation of the Occurrence Patterns and Control Methods of the Ginger Stem Borer
The ginger stem borer (also known as the corn borer, belonging to Lepidoptera, Pyralidae) is a major pest harming ginger. It has a very mixed diet; when causing damage, the larvae bite and feed on the tender stems, then bore into the stem (with frass and insect droppings accumulating at the entry hole), blocking the transport of water and nutrients, causing the stems and leaves above the bore hole to turn yellow and wilt, and they break very easily under external force. 1. Occurrence patterns. The ginger stem borer generally occurs 3-4 generations per year in our area, and the concentrated damage period coincides exactly with the vigorous growth period of the ginger plants. The larvae move from plant to plant causing damage, and finally the mature larvae
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Causes of Spring Yellowing in Winter Onions and Control Methods
For some time now, the author has continuously received letters or phone calls from the public asking about spring management of winter onions. Some people report that winter onions which grew well under low-temperature conditions developed yellowing leaves, root aging, and even death after temperatures rose in early spring, and that cold-resistant winter onion seedlings actually grew worse than local winter onions. Why? Through field observation, the author learned that in spring 2005, winter onions in most regions nationwide showed similar conditions. On the Jiaodong Peninsula, which has the largest planting area in the country, many
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Identification and Control Methods of the Greenbug
Scientific name Schizaphis graminum (Rondani), order Homoptera, family Aphididae. Distributed throughout the country. Hosts include wheat, barley, oats, sorghum, rice, foxtail grass, sedge and other grasses. Damage characteristics: The greenbug often feeds on sap on both the front and back of wheat leaves or inside and outside the basal leaf sheaths, causing wheat seedlings to turn yellow and wither or to lie flat and be unable to joint, and severely affected wheat plants cannot head normally, directly affecting yield; in addition, it can also transmit wheat yellow dwarf virus. Morphology
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