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A Comprehensive Guide to Scientific Control Methods for Soybean Aphids
Soybean aphids are commonly known as "ni chong" (greasy bugs) or "mi chong" (honey bugs). They mostly gather on the growing points, top leaves and backs of young tender leaves of soybean plants, piercing and sucking sap to cause damage. This results in leaf curling, plant stunting and reduced yield, and they can also transmit viral diseases, causing yield loss and quality decline. This pest begins to appear in soybean fields in mid-to-late June, and causes severe damage during hot, dry weather. Soybean aphids have a very strong reproductive capacity; a single female can produce 50-60 offspring, and under suitable conditions, young aphids can give birth after about 4-5 days, and can reproduce 15
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What are the control methods for lily aphids?
They appear in early summer, sucking the sap of tender stems and leaves, causing the plants to wither at the top, affecting growth, and spreading diseases. Control methods: ① Eliminate overwintering sources of the insects, clear away nearby weeds, and carry out thorough field cleaning. ② Spray with a 40% dimethoate 1000-fold solution to kill them.
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What are the methods for controlling aphids during the cotton seedling stage?
The suitable temperature for cotton seedling aphids is 18°C to 25°C, and after rain the temperature rises quickly, which is very suitable for seedling aphids in terms of temperature, and there is a possibility of a heavier outbreak of seedling aphids. 1. Agricultural control: eradicate weeds in cotton fields, strengthen water and fertilizer management, and promote early development of cotton seedlings; combined with thinning and final thinning of seedlings, pull up aphid-infested plants and carry them out of the field to be burned in a concentrated manner. 2. Chemical control: before the seedlings have 3 true leaves, when the rate of curled-leaf plants reaches 5% to 10%, and after 4 true leaves when the rate of curled-leaf plants reaches 10% to 20%, use 10% imidacloprid wettable powder
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How to control licorice aphids? Master these methods
They damage tender leaves, tender shoots, flowers and fruits. Adults and nymphs suck plant sap; in severe cases they can cause leaves to turn yellow and drop, affecting seed set and marketable yield. Control methods: ① Avoid planting next to leguminous plants. ② During the occurrence period, spray with 40% dimethoate emulsifiable concentrate at 1000 times dilution.
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How to control black locust aphids? Master these methods for good results
Control methods for black locust aphids: 1. Protect natural enemies such as ladybugs, hoverflies, green lacewings and aphid parasitoid wasps. 2. Strengthen pest monitoring and forecasting. When the number of winged aphids suddenly increases and the rate of aphid-infested plants reaches 20% to 30%, spray pesticide promptly. If the ratio of ladybugs to aphids reaches 1 to 100, and the aphid population shows a declining trend, stop spraying pesticide for control and protect natural enemies. 3. During the peak outbreak period, spray 50% pirimicarb wettable powder at 1500 times dilution, 10% imidacloprid wettable powder at 1500 times dilution, or spray EB-82 aphid-killing fungus at 300 times dilution
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A Detailed Guide to the Harm Caused by Cotton Summer Aphids and Their Control Methods
Cotton summer aphids are the offspring of aphids that reproduce during the cotton seedling stage. Summer aphids begin to harm cotton after the onset of the dog days, and their harmfulness is far greater than that of seedling-stage aphids. The oily excrement excreted by summer aphids covers the cotton leaves, reducing leaf surface function, hindering the normal progress of photosynthesis, and obstructing the transport of nutrients, causing the tender leaves of cotton to curl and shrink, which in turn causes cotton squares and bolls to drop. Therefore, doing a good job in controlling summer aphids is an important measure for striving for high yields and early production of summer bolls. 1. Grasp the timing of control: cotton summer aphids usually
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How to control oleander aphids? A full breakdown of practical methods
Oleander aphid, also known as the kapok aphid, belongs to the order Homoptera, family Aphididae. It is distributed throughout southern China, as well as in various countries of Southeast Asia, Africa, and South America. Damage symptoms: nymphs or aphids attack oleander, stunting the growth of affected new shoots, turning the upper and lower leaves black, and causing flower buds and flowers to develop incompletely and open abnormally, reducing ornamental value. Morphological characteristics: the wingless parthenogenetic female is oval in shape, 2.3 mm long, yellow like a banana peel. The frontal tubercles are raised, higher than the median frontal tubercle; the antennae are dark, with coarse tile-like sculpturing; the rostrum reaches the middle coxae. The cornicles are long and tubular, dark
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How to control oleander aphids? Aphid control methods for garden ornamental trees
Distribution and damage The oleander aphid Aphis nerii Boyer de Fonscolombe, also known as the oleander yellow aphid, belongs to the order Homoptera, family Aphididae. It is distributed in Changchun, Shenyang, Baotou, Taiyuan, Ningbo, Guiyang, Urumqi and other places. It pierces and sucks sap from the new shoots and young leaves of oleander plants, affecting normal plant growth and flowering. Morphological characteristics: wingless female aphid body length 2 mm, body apricot yellow, antennae dark brown, legs black, cauda tongue-shaped, with 11-14 curved hairs. Winged female aphid oval, head and thorax black,
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How to control cotton aphids in summer? These methods you need to master
Control of cotton aphids in summer. 1. Rotate the use of pesticides. Rotate the use of conventional field pesticides such as acetamiprid, imidacloprid and chlorpyrifos to reduce the likelihood of aphids developing resistance. Once aphids develop resistance to a certain chemical pesticide, even if you increase the number of applications and raise the pesticide concentration, you will not achieve the desired control effect. 2. Spray the affected parts evenly and thoroughly. Cotton is now in full bloom and the plants are tall, so when spraying you must be careful and thorough, focusing on spraying the undersides of the leaves in the middle and lower parts of the cotton plant, strictly preventing missed spraying and missed coverage, and truly
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How to control wheat aphids? Three measures to improve control effectiveness
Wheat aphids are one of the main pests currently harming wheat. In recent years, due to changes in climatic conditions, a decrease in the number of natural enemies, and improper control measures in wheat fields, the harm caused by wheat aphids has become increasingly serious, resulting in reduced wheat yield and declining quality. In response to farmers' situations in controlling wheat aphids, taking the following three measures can improve the control effectiveness of wheat aphids. Determine whether to control based on the control threshold. The control threshold for wheat aphids is 500 aphids per 100 ears. As long as a field reaches the control threshold, pesticide control should be applied immediately. Controlling according to the control threshold not
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