Japanese turtle wax of yellow poplar
It occurs one generation a year, overwintering with fertilized female adults on shoots.
Morphological features: female adult, wax shell gray or slightly fleshy red, oval. Male adult with a dark brown or brown body and a deep dorsal plate of the head and chest. Nymph, wax shell oval to oval, back slightly raised.
Prevention and control methods: (1) Quarantine measures: when purchasing seedlings in different places, plant quarantine procedures must be strictly carried out to prevent the artificial spread of pests. (2) strengthening garden maintenance and management: through maintenance and management, to create environmental conditions that are not suitable for the survival of shell insects. Implement rotation planting, clear the garden in time, burn deciduous leaves, weeds, disease and insect branches, reduce the population number of overwintering pests, apply fertilizer reasonably, and enhance plant resistance. Reasonable pruning, make it ventilated and transparent, change the living environment, weaken its fecundity and reduce the harm. (3) Chemical control: when the insect population density is not high, you can use a soft brush dipped in a small amount of dichlorvos plus water (1:50 to 100x liquid) to kill. During the nymph outbreak, spray detergent diesel emulsion; 150 to 200x neem oil emulsion; 1000 to 2000 times oxymatrine; 2000 to 2500 times vigorously, spraying once every 10 days or so, three times in a row. (4) protect parasitoids and other natural enemies.
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Why did boxwood turn reddish brown?
Q: I used the brown soil that I planted with tea trees to plant small yellow poplars last spring. Months have passed since then, and the small yellow poplars have gradually withered and become dead. I don't know why. How to save it? Answer: most of the tea trees cultivated in the south are acid yellow brown soil, whether it is cultivated big leaf yellow poplar or melon seed yellow poplar, sparrow tongue yellow poplar, etc., there is no soil unsuitable problem. I guess your unit should plant guazihuang poplar. Due to the dry weather after entering autumn, coupled with the low temperature and cold weather in winter, some yellow poplar seedlings that have not yet grown roots have yet to grow.
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Production of boxwood bonsai
(1) Botanical knowledge belongs to Populus tomentosa. Evergreen shrubs or small trees, dense branches, branchlets quadrangular, branches and leaves towering on clusters. Leaves opposite, leathery, elliptic or Obovate, apex rounded or retuse, base cuneate, surface bright green, abaxially yellowish green. Flowers clustered in leaf axils or branches, blooming in April, yellowish green. Capsule ovoid. Main species and varieties 1. Populus tomentosa, also known as Populus tomentosa. Evergreen dwarf shrubs, densely branched. Leaves opposite, leathery, spatulate or oblanceolate, surface
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