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How Do Penguins Get Through Winter? Uncovering How Penguins Overwinter
Penguins are born into winter. Penguins can live and breed in the severe cold of -60°C. Of course, after winter sets in in Antarctica, their companions huddle together to keep warm. The penguin has the reputation of being the "boat of the ocean" and is one of the oldest swimming birds. It mainly lives in the Southern Hemisphere and belongs to the order Sphenisciformes, family Spheniscidae.
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What Are Orcas Afraid Of? Uncovering the Orca's Natural Enemies
The orca is a large toothed whale and a fairly typical marine creature. When we talk about orcas, we usually wonder whether there is anything they are afraid of. Today, let us take a look together! I. What Are Orcas Afraid Of As a large mammal in the ocean, because
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The Latest Guide to Management Techniques and Methods Before and After Winter Leek Shed Covering
When cultivating leeks in winter, because the temperature is relatively low, a shed must be covered to keep them warm so that the leeks can grow normally, and the management before and after covering the shed is also relatively important, directly affecting the growth and yield of the leeks. So how should leeks be managed before and after covering the shed? Part One
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What are the precautions for mulch film covering in vegetable greenhouses?
Vegetable cultivation is very common in China, and nowadays no matter what kind of vegetables are grown, greenhouse cultivation is generally the main method. And when growing vegetables in greenhouses, mulch film covering is indispensable. When covering vegetable greenhouses, there are many points that need
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The Complete Guide to the Latest Fertilization Methods for Fruit Trees, Covering Common Fruit Tree Species
Fertilization is an essential practice for fruit tree growth. A suitable fertilization method can help the fruit grow better, but how to fertilize is a matter of skill. The mainstream fertilization methods for growing fruit trees are the following four, each with its own characteristics, and growers can refer to them. Below, the editor will
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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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What are the covering materials for vegetable greenhouses?
Vegetable greenhouse planting technology is a fairly common technique. It has good heat-insulating performance and is deeply loved by people, because off-season vegetables can be eaten at any time. Under normal circumstances, greenhouse vegetables all use a structural framework mainly made of bamboo and steel,
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Why Does He Shou Wu (Fallopia multiflora) Look Like a Person? Uncovering the Human-Shaped Hoax and How to Identify It
Everyone knows that He Shou Wu (Fallopia multiflora) can treat gray hair. Although what we usually buy at the pharmacy is processed He Shou Wu, there are often reports that a human-shaped He Shou Wu has been dug up somewhere. So why does He Shou Wu grow to look like a person? And are the human-shaped He Shou Wu weighing dozens of jin on the market
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Why do bananas have no seeds? Uncovering their method of reproduction
Presumably many people have a question in their hearts: Why do bananas have no seeds, and what is their method of reproduction? In fact, the earliest and most primitive bananas did have seeds. The original wild bananas contained hard seeds one by one, making them extremely inconvenient to eat. Long-term
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What Is the Miracle Fruit? Uncovering Its Mysteries and Why It Doesn't Bear Fruit
The miracle fruit is a very precious fruit. Its place of origin is in the region of West Africa, Ghana and Congo, and it is a typical tropical evergreen shrub. After the 1960s, the miracle fruit began to be cultivated in our country. If one absolutely had to add another modifier in front of "precious fruit," then it could be described as national-treasure level; the miracle fruit is protected in every country where it is cultivated, and its export is prohibited. So what exactly is the miracle fruit? Wherein lies its mystery? Why does it not bear fruit?
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