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Are stink bugs beneficial insects or pests? Uncovering the origin of the name "stink ladybug"
Stink bugs, about the size of a woman's fingernail, uniformly dark brown, are called stink bugs, fart bugs, poop bugs, or "stink ladybugs" because they release a foul odor. So are they beneficial insects or pests? According to agricultural records, stink bugs are a general term for a class of insects with abnormally variable wings, with over 30,000 species, of which more than 90% are pests. However, insects also have a beneficial side. Beneficial species include predatory stink bugs that feed on small insects and benefit agriculture, the medicinal jiuxiang bug, the edible guihua cicada, and the field giant water bug and pine algae bug that specifically prey on juvenile fish and harm the aquaculture industry. <p style="text-align: center;"><span style="line-height:1.6; text-indent:2em"></span></p> <p style="text-indent:2em;">Most stink bug species are pests. In the cotton region of the Yellow River basin, 3-5 generations occur each year, overwintering as eggs in dead branches and stubble of alfalfa, broad bean, pomegranate, apple, etc., as well as in dead cotton branches and boll shells. They hatch in early to mid-April and emerge as adults in late April. Mid-June to mid-July is the peak damage period. Adults are phototactic, lay more eggs in densely growing cotton fields, and prefer high temperatures and rain. Temperatures of 25°C-30°C and relative humidity above 80% are suitable for egg hatching and reproduction, and cotton fields near alfalfa plots, green manure fields, or with many weeds suffer the most severe damage.</p> <p style="text-indent:2em;">In the suburbs of Beijing, stink ladybugs mainly harm fruit trees such as pear, peach, and apple, with damage rates generally around 15% to 25%, and fruit damage rates as high as over 70%, turning the fruit into “monkey-head peaches” and “pear lumps” that taste bitter and lose their food value. In urban areas, stink ladybugs harm various landscaping trees and flowers such as willow, elm, mulberry, poplar, pagoda tree, eucommia, paulownia, and pomegranate. They suck the sap of flower buds, petals, leaves, tender leaves, and fruits, greatly reducing the effectiveness of landscaping and beautification.</p> <p style="text-indent:2em;">To control stink ladybugs, you can concentrate on trapping and killing them when they overwinter; in early spring, take measures such as plugging tree holes and scraping off old bark; at noon in summer, gently shake the tree trunk by hand and promptly kill the stink ladybugs after they fall to the ground; in addition, control should be carried out during the nymph stage of stink ladybugs, because during this period they can only crawl and cannot fly. At present, the use of the stink bug's natural enemy, the stink bug egg parasite wasp, for biological control of stink ladybugs at the forestry biological control center has entered the experimental stage. Field surveys show that the stink bug egg parasite wasp has a high parasitism rate on stink bug eggs, with an average parasitism rate of 47.22% on tea-winged stink bug eggs and 30.56% on pear stink bug eggs, making it a natural nemesis of stink ladybugs.</p> <p style="text-indent:2em;">The rice stink bug egg parasite wasp parasitizes rice brown stink bug eggs, singly. In a July 1957 survey of rice fields in Hangzhou, Zhejiang, up to 97.1% of rice brown stink bug eggs were parasitized by black egg wasps, of which this species accounted for 94.2% and the rice stink bug small black egg wasp for 2.9%. The sex ratio of this species was 81.54%. According to another survey in Wangcheng, Hunan, of the 67.24% parasitism rate of rice brown stink bug eggs, this species accounted for 41.75% (Zhou Renlian, 1955). Parasitized eggs appear black before emergence and light yellow after emergence. The emergence hole is on the top surface of the egg, irregularly circular, with an uneven cut edge and strip-like debris connected to the rim of the hole. Creamy egg contents remain on both sides inside the egg. Adult wasps mate immediately after emergence, and the time is extremely short, only 3-5 seconds. When laying eggs, they constantly use their antennae to explore above and to the sides of the egg, and always insert eggs from the side. Laying one egg takes about 30 seconds; after laying, they move slightly and then lay eggs on another host. When reared by introducing fresh stink bug eggs, the period from egg laying to emergence is 7 days, with an average of 22 offspring wasps. Adult wasps live 4 days, and if supplied with diluted honey solution, this can be extended to 20-22 days.</p>
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Are Soil Nematodes Insects? Full Analysis of Their Harm and Control Methods
Nematodes in soil are abundant in number and diverse in species. Soil nematodes are widely distributed in all types of soil, and the number of nematodes varies with soil depth, with the largest number of soil nematodes distributed within the 10-20cm soil layer. As one of the number one killers among common soil-borne diseases, nematodes
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How do pitcher plants catch insects? Are they harmful to humans, and how to grow them at home
Pitcher plant, also known as water-pitcher plant, monkey water bottle, monkey urn, piglet cage, and forget-sorrow grass, is an annual herb with no bulb, flowering and fruiting throughout the year. So how does the pitcher plant eat insects? Is it harmful to humans? Can it be kept at home? How to grow it? According to data from the Droseraceae family,
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Can pitcher plants be kept at home? Toxicity, why they eat insects, and how to sow seeds
Pitcher plant is the general term for all species in the genus Nepenthes. Also called water-pitcher plant, monkey water bottle, monkey jug, piglet cage, and Leigong pot, it belongs to the tropical insectivorous plants. So can pitcher plants be kept at home? Are they poisonous? Why do they eat insects? How do you plant the seeds? From pitcher
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Autumn mushrooms: keep the three insects and one disease under control - and can you still eat wild mushrooms after autumn?
Autumn has arrived, and many vegetable plants have entered the stage of harvest or sowing, and many vegetables and fruits unique to this autumn season have also appeared on the market. There are many kinds of mushrooms, and autumn mushrooms are one of them. So what are the control measures for the "three insects and one disease" of autumn mushrooms?
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Can Sandalwood Repel Insects? A Detailed Explanation of Its Benefits, Effects, and Impact on Pregnant Women
Many people love to burn a little sandalwood at home. Its fragrance can soothe and release pent-up emotions and calm the mind. Besides this, sandalwood is also a traditional Chinese medicinal herb. So what are the benefits and effects of sandalwood? Can it repel insects? Does it affect pregnant women? 1.
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Autumn Pest Prevention Science: What Beneficial Insects Live in the Field? Not All Insects Are Pests
In pristine forests, the vegetation is lush and the variety of insects is great, yet it is rare to see any single pest species in large numbers, let alone running rampant and causing disaster. The reason is that in such an environment, although there are many kinds of insects, they are also divided into camps, struggling against one another while
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Why does the tropical carnivorous plant Nepenthes eat insects? Master these points for safe overwintering!
When it comes to Nepenthes, everyone surely knows it: not only does it eat insects, but it also has extremely high ornamental value, so many people like to grow a few pots of it at home or in the yard. So why does Nepenthes eat insects? And how do you grow it so it overwinters safely? I. Introduction to Nepenthes:
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How to Grow Pitcher Plants? These Plants Can Catch Insects Too
The pitcher plant gets its name from having an organ resembling a pig cage (the pitcher). Its body is divided into the petiole, the leaf blade and the tendril; the tendril can curl back to form a pitcher shape, which it uses to catch insects. Some people find this interesting and want to grow one. So, how do you grow a pitcher plant
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What pesticide is most effective against scale insects, one of the "five small pests", and what natural enemies do they have?
Scale insects, also called mealybugs (scale insects), mainly damage various fruit trees, flowers, succulents and other plants, often gathering in clusters on branches, leaves and fruit, feeding on plant sap, and in severe cases causing plant death. Today the editor will introduce to you what pesticide is most effective against scale insects.
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