Peony in Hezhou - Pest and Disease Infestation of June Snow and Its Prevention and Control Methods
June snow, simple flower color, single life may be a few bushes on the top of the twigs, the fire is good-looking, but once threatened by the pest and disease, the growth of June snow will be affected, beautiful no longer, so today Xiaobian to inform everyone how to prevent and control pests and diseases.
Diseases and prevention methods of June snow
dodder
A climbing herb that parasitizes the June snow, surrounds the backbone and branches of the June snow with a vine, and the entangled branches will be scarred, and the vines of the silk seed form suction cups at the mark to absorb nutrients from the June snow branches.
The seeds grow rapidly, and they will continue to branch, climb the plant, and intersect with each other, eventually covering the entire plant.
Prevention and control methods
With regard to the severely affected plots, they are turned deep every year, and where the seeds are buried below 3 cm, they are not easy to unearth.
In late spring and early summer, plants are inspected, and once they are found, they are eliminated and destroyed along with weeds and damaged parts, and the budding branches and wild plants that play a bridge effect are removed together.
At the peak of seed germination, spray 1.5% sodium pentachlorophenol and 2% pragram purification solution to the soil, and then spray once every 25 days, a total of 3-4 sprays, you can effectively prevent the emergence of silkworm seedlings.
Insect infestation and control of June snow
snail
Snails are usually in May-June, June snow will enter the flowering period when the hazard is severe, will form leaf, stem damage, and then form leaf fall, June snow growth weakened, to threaten the entire plant.
It can be sprayed with 58% wind thunder emulsion 1500 times liquid. Sometimes root rot occurs, at the beginning of the disease can be used 12% copper rosinate emulsion 600-1000 times liquid, or 50% root rot 800 times liquid irrigation root and foliar spray control, spray (irrigation) once every 3-5 days, continuous spray (irrigation) 3-4 times.
Mesothecarpus
Mesophyllum is a mealybug, the breeding ability is very strong, can reproduce for multiple generations every year, and May is the peak period of reproduction. Diseases mostly occur at the edges of the leaves or on the opposite side of the leaves, but the appearance of the leaves also occurs from time to time.
The shell worm pierces into the leaves with the mouthpart and sucks the sap of the June snow leaves, and the leaves of the light victims will turn yellow and old, affecting the growth of the plant; when severe, the leaves will gradually dry out and fall until the whole plant dies.
Spray control with 40% oxidized 1000 times liquid or 50% dichlorvos 1000 times liquid and 2.5% cypermethrin 3000 times liquid, sprayed every 7-10 days, sprayed 2-3 times continuously.
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