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Key points of pollution-free control techniques for citrus cultivation
When chemical pesticides are used to control citrus pests and diseases, costs are high and resistance is easily developed. Guiding fruit growers to use the following simple and economical methods gives good results in controlling certain citrus pests and diseases. The specific control methods are as follows. 1. Plant ash to control citrus leafminer: during the shoot-flushing period, start when the new shoot has grown to about 3 cm, and continue until the new shoot matures, sprinkling once every 5-7 days for 5-6 consecutive times, and during the interval, replenish promptly after rain. In the early morning when the dew has not dried, or after rain, or after watering, promptly sprinkle plant ash onto the upper and lower surfaces of the leaves of the new citrus shoots. Throughout the shoot period, the leaves should remain constantly coated with the ash powder until the shoot leaves mature. This method is suitable for greenhouse or open-air citrus nurseries, young citrus orchards, and potted ornamental citrus for controlling citrus leafminer.
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Methods for Preventing and Controlling Pests and Diseases of Winter Jujube Trees in Autumn and Winter, and Key Technical Points
After the beginning of autumn, winter jujube trees gradually enter the dormant period, and their tolerance to chemicals is relatively high. As temperatures drop, pests and diseases enter bark cracks, scars, branch forks, fallen leaves, fallen fruit, mummified fruit or the soil, where they lurk to overwinter. Therefore, it is necessary to seize the favorable opportunity for pest and disease control in autumn and winter,
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Spring Pruning Methods and Technical Key Points for Densely Planted Jujube Trees
The small canopy open-center layered form has a trunk height of 80-90 cm. Suppress the secondary branches on the trunk and promote the development of 3-4 jujube heads (main shoots), so that the topmost jujube head extends upward to become the trunk extension branch, and the 2-3 jujube heads below are trained as main branches. In the second year, cut back the trunk branch leaving about 60 cm, and remove the
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Detailed Explanation of Key Points of Winter Pruning Techniques for Peach Trees
Winter pruning of peach trees can be carried out from after leaf fall until bud break the following year. During winter pruning, it is important to grasp the following points: 1. Be sure to determine the pruning plan and methods based on the growth and fruiting habits of peach trees. 1. Peach trees are extremely heliophilous (sun-loving) species. Therefore, in pruning, full
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Management points for bagging peaches in peach tree cultivation
1. Bagging time. Combine with fruit thinning; bag as soon as the fruit is set. Orchards with peach fruit borer damage must be bagged before the peach fruit borer lays eggs. 2. Bagging targets. Mainly for mid-season and late-season varieties, especially late-season varieties, such as Bayuecui, Guoguangmi, Chushuhong, Hongxuetao
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Key Points of Early High-Yield Cultivation Techniques for Peach Trees
In the spring of 2002, a peach orchard of 0.67 hm2 was established in Yutian County, Tangshan City, with the cultivars Shijiwang Tao and Shijihong Tao. In 2003, the average yield per 667 m2 was 890 kg; in 2004 it reached 2400 kg; and in 2005, 2006, and 2007 the yield stabilized at 3500 kg. The specific management techniques are described below.
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How to prevent and control peach latent mosaic viroid? Key points for disease prevention in peach tree cultivation
Peach latent mosaic viroid is also known as peach mosaic disease, peach yellow mosaic disease, peach variegation disease, etc. It occurs in many countries such as the United States and Japan, and similar diseased plants have also been found in China. The only host of this disease is peach. (1) Symptoms Peach latent mosaic viroid is a latent disease, and the leaves generally do not
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Scientific Fertilization Methods and Technical Points for Plum Cultivation
I. Fertilizer Types 1. Base fertilizer: Base fertilizer is a fertilizer that can supply plum trees with various nutrients over a relatively long period. It is generally dominated by slow-release farmyard manure, such as compost, barnyard manure, crop straw, green manure, fallen leaves, etc. An appropriate amount of quick-acting nitrogen fertilizer can be added to the base fertilizer to meet the large amount of nitrogen needed by plum trees during early spring germination and flowering.
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What are the key points of orchard management after plum harvest?
1. Apply tree-strengthening fertilizer. After picking, be sure to fertilize promptly and irrigate promptly to restore vitality and strengthen the tree. The fertilizer should be mainly quick-acting nitrogen fertilizer, and the amount applied can be determined by how much fruit was set and how strong or weak the tree is. 2. Pest and disease control 1. Peach green leafhopper. Peach green
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Plum tree training and pruning methods and key technical points
① Training. The tree form can be natural open-center, multi-main-branch natural form, or Y-shape. For young trees, the trunk height is set at 30-50 cm. After sprouting, keep 5-6 buds as main branches; when the main branches are 50-60 cm long, leave 40 cm and pinch off the tips. In August, keep 2-3 permanent main branches, and pull the extra 2-3 main branches apart to make them droop, so they can bloom and bear fruit the following year. Later, as appropriate, train them into medium-to-large fruiting branch groups.
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