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Control Methods for Red Spider Mite Infestation in Perilla
Perilla, alternate names: Guiren, white perilla, red perilla, etc.; it is an annual herbaceous plant of the Lamiaceae family. It has a distinctive aroma. The leaves are mostly wrinkled and curled; when flattened, complete leaves are ovate, 4 to 11 cm long and 2.5 to 9 cm wide, with a long-tapered or acute apex, a rounded or broadly cuneate base, and serrate margins. Both surfaces are purple, or the upper surface is green, and the lower surface has numerous sunken glandular scales. The petiole is 2 to 5 cm long, purple or purple-green, and brittle. The young branches are purple-green, with pith in the center of the cross-section, a fresh fragrance, and a slightly pungent taste. Perilla leaf can disperse exterior cold and has a relatively strong diaphoretic effect. It is used for wind-cold exterior patterns with symptoms such as aversion to cold, fever, and absence of sweating, and is often used together with ginger; if the exterior pattern is accompanied by qi stagnation, it can also be used together with Cyperus rotundus and dried tangerine peel. In moving qi and relieving middle fullness, perilla leaf is used for spleen-stomach qi stagnation, chest oppression, and nausea. It is native to China and is mainly distributed in countries such as India, Myanmar, Japan, Korea, South Korea, Indonesia, and Russia. In China, wild and cultivated varieties are found in North China, Central China, South China, Southwest China, and Taiwan, China.</p><p></p><p>Perilla is highly adaptable and not strict about soil requirements. It grows well in well-drained sandy loam, loam, and clay loam, and when cultivated in fertile soil in front of and behind houses and along ditches and field edges. The previous crop is best as vegetables. It can also be planted under young fruit tree groves. Perilla is commonly used as a traditional Chinese medicine in China, while Japanese people mostly use it in cooking, especially as an indispensable accompaniment when eating sashimi. In a few areas of China, it is also used as a vegetable or made into tea. Perilla leaf is also called Su Ye, and has the functions of releasing the exterior and dispersing cold, moving qi, and harmonizing the stomach. It mainly treats wind-cold common cold, cough, chest and abdominal distention and fullness, nausea and vomiting, and other conditions. The seed is also called Su Zi, and has the functions of relieving cough, calming wheezing, and eliminating phlegm. The whole perilla plant can be distilled into perilla oil, and the oil obtained from the seeds is also called perilla seed oil. Long-term consumption of perilla seed oil has a clear therapeutic effect on coronary heart disease and high blood lipids.</p><p>Control of the pest red spider mite in perilla</p><p>Symptoms of red spider mite damage in perilla: red spider mites harm perilla leaves. It occurs most severely from June to August when the weather is dry, with high temperature and low humidity. Adult red spider mites are tiny, generally red, and sometimes yellow. Red spider mites gather on the back of leaves and pierce and suck the sap. At first, yellow-white small spots appear at the damaged areas, and later larger yellow-brown scorched spots can be seen on the leaf surface. After expansion, the entire leaf turns yellow and loses greenness, and leaf drop is commonly seen.</p><p>Control methods for red spider mite in perilla:</p><p>1. At harvest time, collect fallen leaves in the field and burn them in a concentrated manner; in early spring, clear weeds on field ridges, along ditches, and beside roads.</p><p>2. During the occurrence period, spray early with 40% dimethoate emulsion at 2000 times dilution. However, spraying must be stopped half a month before harvest to ensure that no residual toxin remains on the medicinal material.</p><p>(3) Silver-striped noctuid: from July to September, the larvae harm perilla, and the leaves are bitten into holes or notches. The mature larvae make thin silk cocoons on the plant and pupate. Control method: spray with 90% crystalline trichlorfon at 1000 times dilution.</p>
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How to Overcome Alternate Bearing in Mango? Detailed Explanation of Cultivation Measures
To overcome alternate bearing in mango, the first requirement is to have an appropriate amount of flowers; the second is to have the flowering period avoid low-temperature rainy weather; the third is to find ways to increase the fruit-setting rate. The measures are: 1. Selection of varieties According to the characteristics of Guangxi's early spring, which is mostly low-temperature rainy weather, it is ideal for mango to bloom after early April.
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How to Control the Alternate Bearing of Plum Trees? Practical Cultivation and Management Methods
1. Reasonable pruning to regulate tree vigor. On-year trees should be pruned early (before the onset of winter) and heavily. Remove dead branches, residual branches, slender branches, scorched-tip branches, diseased and pest-infested branches, and excessively dense, crossing branches. Do more heading back to stimulate shoot growth; for vigorous branches and competing branches, cut back hard, removing 2/3 to 3/4 of the branch or leaving only 3 to 5 buds. Thin flower buds early, prune away excess flowering branches, and reduce the fruit load. Off-year trees should be pruned late (around the beginning of spring), keeping flowering branches and thinning out non-flowering vegetative branches. Leave branches unpruned or bend them down to moderate tree vigor, retain as many flowers and fruits as possible, and increase the fruit set.
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How to Eliminate the Alternate Bearing Phenomenon in Bayberry Cultivation
Bayberry is a famous characteristic fruit tree of our country, mainly distributed in various places south of the Yangtze River basin, and the latest high-yield techniques have also been widely popularized. 1. Fertilizer and water management: In the current year, annual vegetables or green manure can be intercropped in the woodland to improve soil fertility. Young trees should be given quick-acting fertilizers ⟦4 <p>Bayberry is a famous characteristic fruit tree of our country, mainly distributed in various places south of the Yangtze River basin, and the latest high-yield techniques have also been widely popularized.</p><p></p><p>1. Fertilizer and water management: In the current year, annual vegetables or green manure can be intercropped in the woodland to improve soil fertility. Young trees should be given quick-acting fertilizers as the main application, with nitrogen, phosphorus, and potassium applied in combination. Adult trees are topdressed twice a year: the first time in late winter and early spring before bud break and shoot emergence, and the second time after fruit harvest, accounting for 50%—55% of the annual fertilizer application. In addition, work such as soil improvement and draining waterlogged areas should be done well to ensure the high quality and high yield of bayberry.</p><p>2. Shaping and pruning: The tree form of bayberry is mainly the natural round-headed shape. Pruning of young trees is mainly for trunk determination and shaping, cultivating an early-fruiting and high-yielding tree body. Generally, a “one trunk and three main branches” natural open-center canopy is used. Pruning of adult trees is mainly to cultivate a high-yielding population structure, regulate the relationship between growth and fruiting, and promote sustained, high-quality, high yield.</p><p>3. Prevention and control of alternate bearing: Bayberry is a typical fruit tree with alternate bearing, regularly fruiting in alternate years. Therefore, overcoming alternate bearing is an important project in bayberry production, and technical measures such as girdling to suppress shoots and promote flowering and fruit retention, and flower and fruit thinning, can be applied for regulation. 1. Girdling to suppress shoots, promote flowering, and retain fruit: The traditional measure for controlling shoots, promoting flowering, and retaining fruit is ring barking or the use of chemical hormones. This method can achieve good short-term benefits, but it causes great harm to tree vigor, and in severe cases can lead to tree death. At present, the widely applied technique is girdling and applying the pollution-free cationic activator “Flower Promoter No. 2”, which controls shoots, promotes flowering, increases the fruit-setting rate, and can eradicate alternate bearing. 2. Large branch pruning: For adult bayberry trees left to grow freely, use the methods of “cutting high branches and controlling the canopy” and “removing inner branches and opening skylights” on the trunk and main branches. For newly planted young trees, the method of “first letting grow, then pruning” can be implemented, that is, allowing free growth in the first year, and gradually adjusting to a dwarfed and open tree form after the 4th year when fruiting begins. 3. Scientific fertilization: More potassium fertilizer should be applied, once a year. Less phosphorus fertilizer should be applied, because too much phosphorus fertilizer often causes many fruits, small size, and poor quality, aggravating the alternate bearing phenomenon. Nitrogen fertilizer should be applied appropriately to promote the expansion of young fruits. Young trees should be appropriately given chemical fertilizers, while adult trees should mainly be given farmyard manure.</p><p>4. Pest and disease control: Bayberry has strong stress resistance and relatively few pests and diseases. The main insect pests include white peach scale, leaf roller moths, and bagworm pests. The main diseases include brown spot disease and crown gall disease. Control methods: 1. Chemical control: For crown gall disease, after rain in spring and autumn, first use a sharp knife to cut off the disease tumors, then apply “Tree Guard General” emulsion to the wounds, so that the disease spots quickly dry up and fall off, eliminating the source of infection; for brown spot disease, in the early stage of disease occurrence, use 50% carbendazim 500—600 times solution or 70% thiophanate-methyl 800 times solution or 65% zineb 600 times solution + “New High Lipid Film”, spray the canopy once every 7—10 days, for 2—3 consecutive sprays. 2. Strengthen cultivation management to enhance tree vigor; promptly prune diseased branches and dead branches, and after pruning, promptly apply “Wound Healing and Antiseptic Film” to protect the wounds; 3. Do a good job of winter orchard cleaning, remove fallen leaves and weeds, burn them in a centralized manner, and then spray the whole orchard with “Tree Guard General” 100 times solution for sterilization and disinfection.</p>
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What to Do About Alternate Bearing in Apple Trees? A Full Guide to Prevention and Treatment
Apples are sweet and tart, with thick flesh and plenty of juice, and different varieties differ in flavor; for instance, Granny Smith apples are fairly tart and crisp, while Red Fuji apples are fairly sweet. Recently, apple tree growers have asked, what should be done about alternate bearing in apple trees? Let us learn about the solutions
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What are the latest control measures for alternate bearing in kiwifruit?
Kiwifruit is what we commonly call the kiwi in daily life, rich in vitamins and welcomed by many people. At present, the planting area of kiwifruit in China is still very large, but when we grow kiwifruit, alternate bearing is prone to occur,
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Causes of Alternate Bearing in Pear Trees and the Latest Control Methods
Pear trees are grown in all parts of China, and pears are also very popular with many people. For pear growers, however, the alternate bearing phenomenon in pear trees is a major headache. Alternate bearing in pear trees can seriously affect pear yields and reduce growers' economic returns.
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What to Do About the Alternate Bearing of Lychee? Master the Latest Countermeasures
There are relatively many lychee varieties, and due to physiological and climatic reasons, alternate bearing is common, and the alternate bearing phenomenon of lychee severely affects growers' income. Therefore, avoiding or mitigating the alternate bearing phenomenon as much as possible is a matter of particular concern to growers, so what should be done about lychee
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The Latest Methods to Prevent Alternate Bearing in Longan
Longan is widely cultivated in warm regions such as Fujian. Will growing longan bring all kinds of problems? These problems all affect growth and yield. Today we will mainly discuss what to do about alternate bearing in longan and how to maintain balanced and stable yields.
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How to prevent and control the alternate bearing phenomenon in fruit trees? Detailed explanation of the latest measures
When alternate bearing in fruit trees is mentioned, many fruit growers are familiar with it. It occurs in many orchards, especially in orchards at peak fruiting stage, and it happens frequently. After alternate bearing occurs, one year the trees bloom and bear much fruit, and the next year they bloom and bear little fruit, bringing huge economic losses to farmers. So how should it be prevented?
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