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Causes of Navel Orange Fruit Cracking and Control Methods
Why do navel oranges crack? How should they be prevented and controlled? Please give guidance. Generally, navel orange fruit cracking mostly occurs during the rapid fruit expansion stage and the fruit ripening stage. This is caused by the combined effects of fluctuations in soil moisture, temperature and relative air humidity, which make the flesh grow faster than the peel. Preventing and controlling navel orange fruit cracking...
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What are the pest and disease control methods for Fuchuan navel oranges?
Which pests and diseases need to be controlled when growing Fuchuan navel oranges? Please provide an introduction and control methods. The following is an introduction to common navel orange pests and diseases and their control methods for reference: Rust mite: from late May to early June during the young fruit stage, start spraying when 3-5 mites are found on the fruit surface, spray once every 10-15 days, for 2-3 consecutive sprays, then spray 1-2 more times from July to September...
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What are the control methods for navel orange fruit drop caused by insect damage?
What methods can control navel orange fruit drop caused by insect damage? Please provide guidance. Navel orange fruit drop caused by insect damage is mainly due to damage by fruit-boring moths. The severe damage occurs in the later stage, because earlier control combined with other pests and diseases achieved simultaneous control, and production habits have formed such that after September, pesticides are rarely used, and some growers even stop spraying altogether. 9...
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What are the control methods for wheat head blight (Fusarium head blight)?
What methods are used to control wheat head blight? Please provide guidance. Due to the continuous increase in the degree of mechanized wheat harvesting, large amounts of straw returned to the field, and wheat chaff blown and scattered across the field, the occurrence of wheat head blight has gradually worsened. Head blight is one of the major diseases harming wheat; the affected wheat heads turn pink, which is why it is called head blight...
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Common pests and diseases during the wheat grain-filling stage and their control methods
What pests and diseases should be watched for during the wheat grain-filling stage? Please explain. During the Start of Summer period, winter wheat in the north generally enters the flowering and grain-filling stages and has a relatively high demand for water. Because field humidity is high, pests and diseases such as wheat aphids and stripe rust have further developed and spread, so recently winter wheat areas in the north still need to...
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Wheat Seedling Stage Pest and Disease Control Methods and Key Technical Points
How to control pests and diseases at the wheat seedling stage? Please advise. Generally, about 15 days after wheat sowing, the seedlings have basically emerged fully. In the time that follows, how to manage and protect the wheat seedlings is extremely critical. The author recommends several methods for controlling pests and diseases at the wheat seedling stage. Wheat rust: 15 to... days after wheat emergence
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How to control wheat blossom midge? These methods you need to master
How to control wheat blossom midge? Please explain the methods. Wheat blossom midge can be controlled by referring to the following methods: 1. Occurrence patterns of wheat blossom midge. Wheat blossom midge has one generation per year. Overwintering larvae form cocoons in the soil at 20 cm to oversummer and overwinter. In the spring of the following year, when the temperature rises to 10 degrees (at this time wheat is at the jointing stage), the midge begins to break the cocoon and moves up into the 3-10 cm soil layer to prepare for pupation. When the temperature reaches 12 degrees (at this time it is the booting stage of wheat, mid-to-late April), the larvae successively pupate at about 3 cm on the soil surface. This is the best time to apply poisoned soil to control wheat blossom midge. Otherwise, after wheat heading, adult midges emerge in large numbers. Newly emerged adults can mate and lay eggs the same day. Each adult can lay dozens to over a hundred eggs. After 5-6 days, the eggs hatch into larvae, which bore into the wheat glumes and feed on the grain that is filling. In the late filling stage, mature larvae crawl out of the glumes after rain or when dew wets the wheat heads, fall to the soil, and oversummer and overwinter there. By wheat harvest, the damaged grains become "sparrow tongues" or "small black spots", shriveled and black, causing serious yield reduction.
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What are the control methods for wheat blossom midge?
What methods are there to control wheat blossom midge? Please guide. Wheat blossom midge can be controlled by referring to the following methods: 1. Chemical control: the best control period is the pupal stage. Generally, use 200-250 ml of 50% phoxim emulsifiable concentrate or 40% isofenphos-methyl emulsifiable concentrate per mu, add 5 kg of water, spray and mix with 25 kg of fine soil. Alternatively, use 3-5 kg of 3% phoxim or 3% isofenphos-methyl per mu, mix with 20-30 kg of fine soil, and broadcast evenly. Irrigate promptly after broadcasting to improve the control effect. During the adult stage, supplementary control can also be carried out by using 50 ml of 50% phoxim emulsifiable concentrate per mu or 25 ml of Huifeng permethrin emulsifiable concentrate per mu, add water and spray at conventional volume.
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Detailed Guide to Common Pest and Disease Control Methods for Calla Lily
I. Diseases 1. Calla lily soft rot: Soft rot and detachment occur on the plant near the soil surface, causing leaves to wilt upward and the fleshy tuber to develop a soft rot downward, with roots also rotting, and the whole plant suddenly wilting and dying. When leaf edges are affected, they become soft and wet-rotted. When flower stalks are affected, the flowers turn brown, and the stalks become soft-rotted and drop off...
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What are the control methods for leaf spot disease in calla lilies?
I. Symptoms: Infected leaves develop lesions ranging from light brown to yellowish-brown, mostly round, oval, or irregular in shape. A few lesions have indistinct concentric rings. In the later stages of the disease, many small black dot-like moldy growths appear in the center of the lesions, namely the conidiophores and conidia of the pathogen. II. Pathogen and disease occurrence...
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