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Preliminary Research Report and Analysis of the Larch Sawfly
1 Distribution and Damage The larch Itempast sawfly is mainly distributed in Heilongjiang and Jilin provinces. It is a dangerous pest of larch foliage, with a damage period from June to September, mainly attacking 10-30 year old larch. This insect spreads relatively quickly and causes severe damage. In 1985, the affected area in Hailin Forestry Bureau was 300 mu, and by 1986 the third-generation larvae affected an area of 150,000 mu, of which 67,000 mu were severely damaged, with the highest population density reaching 21,000 larvae per tree; the average population density
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Preliminary Report on the Breeding of Dongxuewang Tao, a New Extremely Late-Ripening Peach Line
With the breeding objective of developing new varieties that are extremely late-ripening, high quality, storage-tolerant and high-yielding, we carried out hybridization in 1998 using Dongxue Mi Tao (Winter Snow Honey Peach) as the female parent and Zhonghua Shou Tao (China Longevity Peach) as the male parent, obtaining 50 hybrid fruits. In 1999, 46 hybrid seedlings were raised, top-grafting was carried out in 2000, and fruit was borne in 2001. The fruit traits were excellent, and multi-site trials were conducted in 2004. It was selected as a new line and tentatively named Dongxuewang Tao. Its main traits are as follows. (1) Botanical characteristics: The tree habit is relatively spreading; the main branches and perennial branches are grayish white, 2
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How to Make a Preliminary Judgment on the Quality of Pelleted Fish Feed
In recent years, along with the growing popularity of high-yield fish farming, the use of complete pelleted fish feed in fishery production has become very common. However, because there are many feed brands on the market and great differences exist in quality and grade, the vast number of farmers are unable to judge the merits of its quality. This article introduces a simple method for judging fish feed quality by sensory means. That is: "one look, two sniffs, three twists, four soaks, five chews," for everyone to use as reference when purchasing pelleted feed. 1. Look 1.1 Look at color: pelleted fish feed
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Boxwood: A Preliminary Study of a Famous Carving Wood and Its Substitutes
1 Basic Information on Boxwood (Buxus spp.) Boxwood belongs to the family Buxaceae and the genus Buxus, with the English name boxwood. It is an evergreen shrub or small tree, with about 70 or more species worldwide, distributed in Europe, Asia, tropical Africa, and Central America. China has about 17 species, and Yunnan about 8 species. According to the record in "Chinese Woods": "In the Shennongjia forest region of Hubei, the Wuyi Mountains of Jiangxi, and Sichuan Province, there are small-tree timber forests distributed or cultivated in continuous stands, and the Laoshan Forest Farm in Shandong has boxwood with a diameter at breast height of about 30 cm
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A Preliminary Study on the Climatic Argumentation and Regionalization of Oilseed Peony Cultivation in the Chongqing Area
Oilseed peony not only has ornamental value but also extremely high economic value. The cultivars currently used for cultivation are mainly two peony cultivars, Ziban and Fengdan. In recent years, the Chongqing area has carried out the introduction and cultivation of Ziban peony and Danfeng peony. In response to the climatic problems arising in the introduction and cultivation of oilseed peony
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What preliminary preparations are needed for cage culture of rice field eels?
Q: What preliminary preparations are needed for cage culture of rice field eels?
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Preliminary Study Report on the Characteristics of Anlu Golden-leaf Ginkgo
Preliminary Report on the Characteristics of Anlu Golden-leaf Ginkgo The Ginkgoaceae family contains only one genus and one species, a relict plant left over from the Quaternary glacial period [1], endemic to China and known as a living fossil of the plant world. It has edible, medicinal, timber and ornamental uses...
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Experience and insights on how to use Lanjunwang and its preliminary results
Preliminary results of using Lanjunwang
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Analysis of preliminary experimental results on potassium nutrition
Preliminary experimental results on potassium nutrition
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Yifeng: A Preliminary Study on the Relationship Between the Sprouting Rate of Cymbidium goeringii and Temperature and Humidity
Yifeng: A Preliminary Study on the Relationship Between the Sprouting Rate of Cymbidium goeringii and Temperature and Humidity
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