What pests and diseases occur during the cultivation of ginkgo trees?
What pests and diseases affect ginkgo trees? What methods are good for preventing and controlling ginkgo tree pests and diseases? Common ginkgo pests and diseases include ginkgo stem rot, mildew rot, leaf blight, dry rot, ginkgo tussah moth, peach fruit borer, leaf-eating noctuid, ginkgo leaf-roller moth, soybean pod borer, and tea yellow thrips. For detailed control methods, please refer...
What pests and diseases affect ginkgo trees? What methods are good for preventing and controlling ginkgo tree pests and diseases? Please explainCommon ginkgo pests and diseases include ginkgo stem rot, mildew rot, leaf blight, dry rot, ginkgo tussah moth, peach fruit borer, leaf-eating noctuid, ginkgo leaf-roller moth, soybean pod borer, and tea yellow thrips. Detailed control methods can be found in the following list:
I. Harm caused by ginkgo stem rot:This disease mainly damages 1-2 year old seedlings. Under high temperature conditions, it is the main cause of stem rot. Under high temperatures, seedlings are damaged, disease resistance weakens, and pathogens grow and multiply rapidly, invading through seedling wounds and causing disease. In addition, low-lying waterlogged nursery land and poor seedling growth make plants prone to disease. When hot and dry weather continues from June to August, the disease is severe.
Control methods for ginkgo stem rot:Sow early to increase the degree of lignification of seedlings before the high temperature season arrives, strengthen resistance to stem rot, and disinfect the nursery soil, provide appropriate shading, and irrigate in time. In the early stage of disease, use 50% thiophanate-methyl 1000x solution for control.
II. Harm caused by ginkgo mildew rot:During storage, it damages ginkgo seed kernels. At a temperature of about 20°C and under conditions of high humidity, it spreads and causes disease. Immature or broken seeds are more commonly affected.
Control methods for ginkgo mildew rot:Seeds must be harvested after they are fully mature, while avoiding damage to the seed coat. Before storage, they should be fully dried in the shade, and broken seeds and diseased seeds should be picked out. The storage room should be kept at a low temperature, and attention should be paid to ventilation. Before storage, soak seeds in 0.5% potassium permanganate solution for 30 minutes, or spray and disinfect with 40% formaldehyde diluted 10 times.
III. Harm caused by ginkgo leaf blight:The pathogen mainly overwinters on fallen leaves, and forms spores in March of the following year, infecting new leaves. Seedlings begin to develop the disease in early June, and August-September is the peak period. Usually, the disease incidence in seedlings is higher than in large trees.
Control methods for ginkgo leaf blight:Strengthen management, remove fallen leaves, and fertilize appropriately. Plant tree species in a reasonable mix, and avoid interplanting with dawn redwood, pine, tea, or grape. For young trees and large trees, in the early stage of disease in early July, use 40% carbendazim 500x solution for control. For seedlings, the control time is about early June to late August, and at the same time add 0.5% potassium dihydrogen phosphate and 0.2% urea solution for spraying to strengthen their resistance.
IV. Harm caused by ginkgo dry rot:The pathogen invades the trunk or branches through wounds, forming irregular lesions on smooth bark. It is spread by wind, rain, insects, and birds. After May, new lesions appear on the trunk, and July-September is the peak period.
Control methods for ginkgo dry rot:Protect the tree body, avoid wounds, strengthen tree vigor, and improve disease resistance. Remove severely diseased plants and diseased branches or trunks and destroy them in time. For lesions on trunks or branches, scrape them off and apply 10% alkaline water, which has a very good effect.
V. Harm caused by ginkgo tussah moth:It is a large moth, with 1 generation per year. The larvae feed on leaves. Newly hatched larvae have a gregarious habit. 1st-2nd instar larvae can feed from the leaf edges, but the amount eaten is very small. After the 4th instar, they disperse and cause damage, and the amount eaten gradually increases. After the 5th instar, they enter a period of heavy feeding and can eat all the leaves completely.
Control methods for ginkgo tussah moth:From August to September, use black light traps to kill adults. Before the larvae reach the 3rd instar, remove leaves where they cluster and cause damage. When infestation is severe, during the young larval stage, spray 2% deltamethrin 2500x solution or 90% trichlorfon 1500-2000x solution.
VI. Harm caused by peach fruit borer to ginkgo trees:It has 1 generation per year. After hatching, the larvae first crawl a short distance, then bore into the seed kernel to cause damage, eating the entire seed kernel or leaving only part of it. One larva feeds on only 1 seed in its lifetime.
Control methods for peach fruit borer on ginkgo trees:When the 1st generation adults emerge, use 80% dichlorvos 1000x solution for control. At the peak of egg hatching, spray 40% fenitrothion 1000x solution, and spray a second time 7 days later to kill newly hatched larvae.
VII. Harm caused by leaf-eating noctuid to ginkgo trees:Adults suck the juice of the fruit, and affected ginkgo fruit drops within 3-10 days. Eggs are mostly laid on the undersides of leaves of host plants such as Tetrapanax papyrifer and Mahonia fortunei. After the larvae mature, they enter the soil chamber to pupate.
Control methods for leaf-eating noctuid on ginkgo trees:Remove host plants such as Tetrapanax papyrifer and Mahonia fortunei around the ginkgo trees. From early May to mid-June, spray 50% trichlorfon 500x solution, and apply the pesticide again 10 days later. The effect is best when applied at dusk.
VIII. Harm caused by tea yellow thrips to ginkgo trees:Both adults and nymphs damage the leaves of seedlings and adult large trees, sucking sap on the underside of leaves. After feeding, the leaves quickly lose their green color, and in severe cases the leaves become white and withered, leading to early leaf drop. Drought conditions are suitable for the occurrence of thrips. As the temperature rises, the damage shifts from seedlings to larger saplings and large trees.
Control methods for tea yellow thrips on ginkgo trees:Thrips have poor pesticide resistance, and timely spraying easily achieves results. During the high-incidence period from June to August, use 80% dichlorvos 1000x solution for control, spraying twice in a row, with good results.
IX. Harm caused by ginkgo leaf-roller moth:The larvae bore into branches and damage new shoots of the current year, causing dead branches, fallen leaves, and fallen fruit. This insect is light-loving, and damage is heavier around forest edges than inside the forest. The degree of occurrence is closely related to temperature. As altitude and latitude increase, the annual average temperature decreases, and the insect population density decreases accordingly.
Control methods for ginkgo leaf-roller moth:Before the peak emergence period of adults, use 2.5% deltamethrin 2500x solution for control. In the early stage of larval hatching, spray 80% dichlorvos emulsifiable concentrate 800x solution on the damaged branches.
X.Harm caused by soybean pod borer to ginkgo trees:The larvae bore into the seed kernel to cause damage, and have the habit of moving between fruits to cause damage. In severe cases, the seed kernel is eaten completely, leaving only insect droppings in the seed kernel, seriously affecting the yield and quality of ginkgo seeds. Because the larvae burrow into the soil to pupate, their occurrence is closely related to soil moisture and texture. When there is a lot of rainfall and the soil is compact, the occurrence is lighter.
Control methods for soybean pod borer:Do not plant other leguminous plants nearby, so as to reduce the spread of soybean pod borer for reproduction and damage. During the peak occurrence period of adults, spray 50% dichlorvos or 90% trichlorfon 800x solution, and control a second time 10 days later, with very good results.
Click to get more ginkgo tree cultivation techniques
Click to get more flower cultivation techniques