-
Key Technical Points and Detailed Methods for Black Locust Seedling Cultivation
(1) Thinning: Black locust seedlings are light-loving and differentiate early. If seedling density is too high, differentiation becomes even more pronounced, so timely thinning is necessary. The first thinning is carried out when seedlings are 3-4 cm tall, removing diseased and weak seedlings. Afterward, based on seedling growth and density, 1-2 more thinnings are carried out. 12-15 seedlings should be retained per meter of row length. Retaining approximately 12,000-15,000 seedlings per 667 sq m is appropriate.(2) Watering and topdressing: Do not water before black locust seedlings emerge, to avoid surface soil crusting that causes uneven emergence. After emergence, water timely and appropriately, regularly
-
Identification and Control Methods for the Black Locust Aphid
The black locust aphid damages many leguminous plants such as black locust, Chinese scholar tree, and false indigo. Adults and nymphs gather on new black locust shoots to suck sap, causing new shoots to bend, young leaves to curl, and branches to stop growing, while their secretions often cause sooty mold. The wingless aphid is about 2 mm long, oval, pitch-black and glossy, with distinct hexagonal reticulation on the dorsum of the head, thorax, and abdominal segments 1-6; abdominal segments 7 and 8 have transverse striae; the winged aphid is long-oval, black and smooth, with grayish-white, transparent wings. The black locust aphid has more than 20 generations per year. Mainly
-
Biological Characteristics and Control Methods of the Black-spotted Looper Moth on Black Locust
Black-spotted looper moth on black locust. It belongs to the family Geometridae, order Lepidoptera, and is also known as the black locust looper. It is distributed in the black locust forest areas of the old course of the Yellow River in Anyang, Puyang, Xinxiang and Kaifeng cities of Henan Province, mainly damaging black locust (Robinia pseudoacacia), and in outbreak years it can also damage jujube trees and crops. This insect is voracious, and in a short time it can eat all the leaves of entire branches and entire trees. In hot and dry years, it can strip the leaves bare 2 to 3 times a year, causing the upper parts of the trees to die and new shoots to sprout from the middle and lower parts of the trunk, causing serious harm to tree growth. Control methods: (1) Establish
-
Control Methods for Boxwood (Buxus sinica var. parvifolia) Wilt Disease
Boxwood wilt disease has been a common disease of boxwood in recent years. It is characterized by rapid onset, fast spread, and a major impact on landscaping effects. Although this disease is stubborn, if correct measures are taken, targeting the pathogen and applying multiple approaches simultaneously, satisfactory control results can still be achieved. Symptoms: Initially, only the upper three leaves of a single branch of an affected boxwood turn green and dry out from water loss, and then the entire branch and three branches of the whole plant show green wilt and water-loss symptoms. In the late stage of the disease, the three leaves turn yellow-white, and severe infection can lead to plant death. Disease occurrence pattern
-
How do you stop a bonsai boxwood from blooming? Let me teach you a few practical methods.
Boxwood bonsai has become an artistic treasure for its small evergreen leaves, slow growth and resistance to losing shape. Generally speaking, the material for boxwood bonsai is mostly taken from wild old stumps growing by the water. Wild old stumps bloom and set seed very easily. Some people think that boxwood blooming is very "spectacular" and is a great sight. The author currently keeps more than a hundred pots of wild boxwood stump bonsai, and through years of management practice and careful observation, the author has found that boxwood blooming is not a good thing. This is because boxwood blooming has three disadvantages: First, it ruins the leaf appearance. The bud stage of boxwood is long, lasting from August of the previous year to March of the following spring. The fine, dense buds are tucked
-
Engineering Applications and Management Methods for Hokkaido Boxwood
Hokkaido boxwood is an excellent landscaping material, but because it was introduced and promoted relatively late, many design units are still not familiar enough with its growth habits and characteristics, and it is used sparingly or configured inaccurately in design applications. As a result, nursery growers feel lost about how to cultivate and prune it: they plant a whole field of seedlings but do not know how to manage them, and after several years pass, they are left sighing in dismay! Based on several years of research and practice at this nursery, the following cultivation trial methods are considered effective. 1. Single-trunk small tree. When the seedling grows to 1.8-2 m, pinch out the growing tip at the top, keep the upper 30 cm for branching, and remove all branches below so that it concentrates on developing the upper part into a crown.
-
What are the leaf propagation methods for Japanese euonymus (Euonymus japonicus)?
Propagating Japanese euonymus (Euonymus japonicus) from leaves can solve the problem of insufficient propagation material. The specific method is as follows: 1. Cutting time and leaf selection. The best time for cutting is in mid-to-late April, when the temperature is stable at around 20°C. In a greenhouse it can be done year-round. Choose old leaves that are more than one year old; leaves removed when taking cuttings can also be used. The leaves should be picked off by hand, taking care to include a heel; do not cut the leaves off with scissors. 2. Medium and cutting bed. The medium is best made of coarse river sand; a half-and-half mix of peat soil and perlite is also acceptable, as long as the principle is water retention and aeration without waterlogging
-
Cultivation Techniques and Care Methods for Hokkaido Euonymus
Variety origin. Hokkaido euonymus, also known as Japanese euonymus, originated in Sapporo, Hokkaido, Japan. It was introduced in 1986 and, after many years of breeding and selection, became an excellent new variety suited to the climatic conditions of northern China. Characteristics. Hokkaido euonymus has relatively broad, elliptical leaves with bluntly rounded tips, sturdy shoot tips, obvious apical dominance, and a single straight trunk, showing excellent tree-like traits. It grows relatively fast, with an annual growth of 70--170 cm, and a 5-year-old tree can reach more than 3 m in height. Hokkaido euonymus has a very obvious main trunk
-
Bonsai Creation Methods and Technical Key Points for Chinese Boxwood
Chinese boxwood, also known as small-leaved boxwood, thousand-year dwarf, etc., is an evergreen shrub or small tree of the genus Buxus in the family Buxaceae, native to the middle Yangtze River basin and areas to the south in China. It prefers warm, semi-shaded, humid climates, is drought-tolerant, cold-tolerant, and tolerant of pruning, is a shallow-rooted tree species, grows slowly, and has a long lifespan, making it an excellent tree material for bonsai. For bonsai material, one approach is propagation by sowing or cuttings, which, although it can yield large numbers of seedlings, not only takes a long time to cultivate but also makes it very difficult to obtain good material with gnarled roots and exposed claws, vigorous and ancient-looking. The second approach is digging up old stumps, and premium material is mostly obtained by
-
How to grow a Boxwood (Buxus sinica) bonsai? Care management and pest and disease control methods
Boxwood (Buxus sinica), also known as littleleaf boxwood, thousand-year dwarf, etc., is an evergreen shrub or small tree of the genus Buxus in the family Buxaceae, native to the middle Yangtze River basin of China and the regions to its south. It likes warm, semi-shaded, humid climates, is drought-tolerant, cold-tolerant and tolerant of pruning, is a shallow-rooted tree species, grows slowly and lives long, and is an excellent tree material for making bonsai. Care management: Boxwood likes moisture and needs frequent watering to prevent leaf drop caused by water loss. From May to August is the vigorous growth period of boxwood, and several applications of thin, fully decomposed cake fertilizer can be made along with watering. Always pay attention to pruning
条件筛选