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What to Do About Tulip Variety Degeneration? Detailed Solutions
Imported tulips often perform well in the first year of bulb growth, with large flowers and vivid colors. Starting from the second year, the flowers become smaller, the colors turn dull, the leaves and petals show color-breaking patterns, and the plants grow poorly. This is mainly due to virus damage, commonly mosaic virus and color-breaking virus, which cause yellow and white stripes and irregular spots on the leaves. In severe cases, the leaves rot and the flower colors become mottled. Control methods: 1. Use virus-free plants obtained through shoot-tip culture when planting, or choose varieties with strong virus resistance; 2. Promptly
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Control Recommendations for the Overwintering Generation of the Box Tree Pyralid Moth
The box tree pyralid moth (Glyphodes perspectalis) is one of the important leaf-eating pests of forestry plants in this district, mainly damaging Chinese box (Buxus sinica var. parvifolia) and Japanese box (Buxus bodinieri). Since early spring this year, the whole district has carried out 2-3 rounds of comprehensive control against this pest, effectively bringing the damage under control; however, since the damage period of this pest is long and can last until the end of October, continued follow-up monitoring of this pest is still needed. According to monitoring at two sites, the Anting Ginkgo Garden and the Fangtai Flowers and Plants Horticultural Farm, a moth peak appeared under the forecasting lamp in early to mid-September, with the highest moth numbers on September 7-9, averaging 22.3 moths per lamp per day
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How to Carry Out Sprout Regeneration of Black Locust? Detailed Practical Technical Points
1. Site clearing. After clearcutting black locust, a large amount of residues, shrubs and weeds accumulate on the site, which are obstacles to sprout regeneration and should be cleared in time. The main purpose is to improve site conditions and sanitation, create a favorable environment for young tree growth, and promote the young stand to close its canopy as soon as possible. 2. Forest land enclosure. To shorten the forest cultivation cycle, comprehensive enclosure measures are adopted for black locust clearcut sites. Cattle and sheep specifically browse the tender shoots of young trees and cause extremely severe damage to black locust sprouts, so dedicated personnel must be assigned for supervision and protection, grazing must be strictly prohibited; mowing and firewood gathering are strictly prohibited,
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Using the large-plow furrowing method for clear-cut regeneration of black locust
1. Preparatory work. Large-plow furrowing means using a tractor to pull a large plow to furrow in a clear-cut black locust (Robinia pseudoacacia) site. A tractor with relatively high horsepower must be used. An ordinary iron plow for plowing farmland is sufficient, but a single plow is required. First clear branches and large stones from the site. 2. Plot selection. Large-plow furrowing requires concentrated, contiguous plots, a slope of less than 25 degrees, and a soil layer of more than 30 cm. 3. Technical requirements. The black locust root system is relatively shallow, the main root is not obvious, and the lateral roots are well developed. The main lateral roots are mostly distributed in the surface layer at a soil depth of 20-30 cm.
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