Search Results for: White-shouldered house moth with its wings open

1. Proper organisation of the company

…rotective layer of wax, so that they will dry out. If kept dry, it retains its effect indefinitely. A filling with compressed mineral wool mats possibly powdered with diatomatic earth or technically pure boric acid, is another option. In machinery and transport routes there are countless places in which residue from production accumulates and populations of pests can be maintained. It should be a requirement for the design that machinery can be ea…

Detection

…w motion. Silhouettes of natural size. When the large ticks are out in the open, they are easy to see. The ticks that hide in the cracks and crevices can be chased out with a spraying of an insect repellent spray containing pyrethrin I and II and piperonyl butoxide. Spray into cracks in woodwork, etc., and the ticks will come out of hiding after a few minutes time. Pyrethrin has an irritating effect on the ticks. In cold environments, this method…

Drugstore-, tobacco-, spider- and dermestid beetles

…Cockroaches have been gnawing in book bindings Drugstore beetles, tobacco beetles, spider beetles, dermestid beetles and moth larvae, to name only a few, will gnaw through paper, cardboard and plastic packing, and holes in the packaging will often be the first sign that the goods contain live animals….

Some insects are unhealthy to eat

…many people. Bowel disorder can be the result of eating food that contains moth and beetle larvae, beetles and mites. This symptom is primarily the natural reaction to the stiff hair that covers the insects. Secondarily the symptoms can be the result of an allergic reaction. Some beetles such as dark and confused flour beetles give off toxins, quinones, which have mutagenic qualities, according to mouse studies. Cockroaches also give off carcinoge…

Pests can ruin stored goods

…oods and then leave excrements behind. Texture and consistency can change, moth web, visible lumps of excrements, dead, rotting pests, discolouration and unpleasant smells can occur. These are all results of infestations, which all makes goods useless as food for people. A part of the goods which are thrown out are probably still acceptable for consumption. However, it is thrown away because food pests are not tolerated in goods. In western countr…

The active substances, venom, poison and saliva

…er contains a substance, which causes the small blood vessels to contract. With ants and in the hair of the Rusty Tussock Moth, formic acid is one of the skin-irritating substances (like with stinging nettles). Saliva. Blood-sucking insects and mites always inject saliva in the wound while sucking blood. Saliva is a complex fluid containing agents with very different effects. The saliva of some bloodsuckers (caster bean tick, medicinal leech, etc….

Water mites

…cies is called Pyemotes ventricosus. It lives as a parasite on the skin of moth larvae and beetle larvae. In places where there are many larvae, there can be an excess of hungry water mites. This could be in old hay, or in granaries and other places where there are many insect larvae. Another water mite species live on the deathwatch beetles. Attacking people Water mites crawl around in search of a larva, or they move passively through the air wit…

Ichneumons

…Ichneumon ( Latin: genus Ophion ) These insects lay eggs in moth larvae. The adults often enter houses at night, being attracted by the lights. They have a powerful ovipositor which may be long or quite short, according to the species….

Butterfly larvae hair

…skin may continue for a while. In Denmark, one must beware of the Tussock moth larvae, such as brown tail, Euproctis chrysorrhea and gypsy moths, Lymantria dispar, which may be very common in a few years. Furthermore, The Eastern Pine Processionary, Thaumetopoea pinivora have stinging hairs. In Denmark, the eastern pine processionary lives in Dueodde on Bornholm. In places where the hairy larvae live, the air can be full of broken, loose stinging…

Dermestids

…( Latin: hide and bacon beetles) This is a family of beetles, the members of which live mainly on the dried remains of animals and plants (p. 73). The more specialised of them can also, like clothes moth larvae, digest hair and feathers….

4. Packaging

…e done almost insect proof for up to six months when the seams are secured with tape and surface-treated with an insect repellent agent with pyrethrin and piperonyl butoxide. Paper and cardboard provide better protection against insect infestations than textiles. Dense paper packaging protects against pests that cannot gnaw their way in, and provides some protection against less efficient rodents. The thicker the paper packaging, the more protecti…

Laboratory methods for detection of pests in food

…so-called stereo magnifier). It must be equipped with light and preferably with a zoom lens. With this type of lens you can keep live pests in focus while you change the magnification. Magnification beyond 4 xi zoom lens and 10 xi eyepieces is not needed since both the depth of field and brightness deteriorates significantly beyond 40 x total magnification. For very small insects, use a different type of microscope. Use a high resolution microscop…

Fur mites

…s. The fur mites that are of interest to people live on dogs, cats and rabbits. None of fur mites can live or breed on humans. However, they may crawl onto humans and bite. Fur mite bites cause an itchy skin disease called cheyletiellosis or walking dandruff. It is difficult to diagnose. It often takes several visits to the doctors and veterinarians before the diagnosis is made. You cannot make a certain diagnosis until you see the fur mites or th…

Animals that come inside for the winter

…n if they could move around there would be nothing for them to feed on. When autumn comes insects have to find sheltered places where they can spend the winter and for this outhouses and lofts are very suitable. They must also have reached a stage in their life history in which they can go without food and can withstand the unfavourable climatic conditions. The stage concerned will vary from species to species. Some overwinter as eggs, some as lar…

The red-legged ham beetle

…th reddish legs. The larvae are up to 10 mm long. They are light grey, but with clear violet drawings on the upper side. In the rear, they have two dark spots. This species is cosmopolitan, probably mainly spread through the trade of copra. Moreover, the larvae develop in many different products: cheese, dried fish, compound feed and various smoked products. They are also found in cocoa beans and figs. The red-legged ham beetle eats carrion. They…

Fruit flies

…poorly cleaned waste containers. The fruit fly pupae, which almost are cemented to surfaces, are difficult to remove and may give rise to complaints in connection with recyclable packaging. Adult fruit flies are sensitive to the common fly sprays with pyrethrin….

Red poultry mite

…s to grey or blackish, and if it has fasted for a long period it is almost white. The poultry mite lives in henhouses, in dovecotes and similar places, where it remains hidden in crevices during the day. At night it emerges to suck blood. The female lays up to 10 eggs at a time in the hiding-places. She may repeat this process several times, but must eat blood •between each egg-laying session. In the summer the development from the egg to the adul…

Sucking lice

…about a week the egg is ready to hatch and the young louse inside inflates itself with air, pushes off the top of the egg and crawls out. The newly hatched louse starts to feed immediately and after about 8 days it is ready to mate and lay eggs. A population of lice can therefore increase at a fast rate. Lice are by no means a new problem, most mammals harbour their own special species and there is no doubt that our primate ancestors also harboure…

Detection

…When you need to know if a place is infested with castor bean ticks, drag a flag of white flannel, 50 cm x 100 cm, through the tick habitat. Ticks will then sit on the flag, and they are easy to count. You can also drag piece of wood with flannel through the tick habitat….

Bug Indentification

…Trogoderma dermestid beetle Tropical warehouse moth Vinegar fly Warehouse moth White-marked spider beetle Wine moth larva from yellow mealworm beetle Yellow mealworm beetle Yellow-necked mouse excrement When someone finds a new animal, which is not yet known to science, and describes its appearance, it is the describer’s privilege to give it a species name – in Latin. Along with a family name, also in Latin, placed in front, this gives it a uniqu…

Appearance

…spines, which possibly help it dig….

Horse-fly bites

…g bitten by them, when wearing dark clothes. The horse fly prefers to bite white people through dark colored clothing rather than the pale skin. Horse flies only bite in daylight. The risk of getting bitten is greatest near marshes and river valleys. They often stray into cars and houses, which can then act as traps. They do not bite inside; however, they just sit by the windows and wait to get out into the light again. Horse fly bite hurts , and…

The sugar mite

…The body is white and can be up to 0.6 mm long. The sugar mite is covered with long hair sticking out in all directions. Each leg ends in a very thin and long drawn joint. The sugar mite feeds on the fungi that infest hay, straw and grain. In cereals this is usually the first species to appear after harvest. In intervention cereals the sugar mite is often seen for the first time around October 10th and is a kind of precursor to the actual sugar m…

The saw-toothed grain beetle

…ain or food. Each female lays 6 to 10 eggs per day up to 375 in total. The white, flat and very active larvae feed on the same foods as adults and they are hardly ever seen. Saw-toothed grain beetles like heat and cannot reproduce when the temperature falls below 18 ° C. It is rarely hot in cereal storages and the saw-toothed grain beetle is practically only found in grain that already contain granary weevils. In such goods, weevils provide heat a…

Lice bites

…ly five times. At room temperature, the lice can only survive for two days without getting any blood. The greediest lice, the females, consume up to 1 mg blood each meal. This means that the host’s blood loss is very low – even when there are many lice. The blood is digested in the gut. The undigested leftover blood comes out as excrement – small, dry and dark clumps that stick together in short chains. When heavily infected people wear white clot…

Greater weevers

…ngs immediately cause severe pain that radiates from the puncture site. The pain can last for days and there may be complications of heart cramps, fever, etc. Weever venom can stop blood flow so the skin turns white around the place where the spines stung. Since there is no specific antidote, treatment is symptomatic, but the sting victim will recover. Always contact your GP in cases of weever stings….

What insects live off and live in

…travel in the gaps between the kernels. All other large insects must stay on the surface. As pedestrians insects like mites are unsurpassed. They can walk to virtually everything and in all angles with gravity. However, they cannot pass a thin layer of talcum powder or an even thinner layer of petroleum jelly. It prevents them from getting a hold with their feet….

Fleas

…e researchers believe that fleas were once a kind of flies, who lost their wings and adapted to a life as bloodsuckers on birds and mammals. Fleas are usually the most obvious possibility when insects bite people. In Denmark, there are about 45 different flea species. Each species is more or less dependent on a few specific hosts, in which they live and whose blood they suck. The environment of the host animals’ home or nest is important to the fl…

Key to the Main Groups

Without legs With three pairs of legs. Often with wings insects N.B. Newly hatched mites also have three pairs of legs, but they are extremely small, under 1 mm. With four pairs of legs spiders, mites, scorpions etc. With more than four pairs of legs. It may be a slug slugs It may be a worm worms. It may be a maggot-like insect larva insect larvae. With three pairs of true legs, and prolegs on abdomen certain insect larvae. With 7 pairs of legs w…

Spider beetles

…etles often play dead when disturbed. Most of the species rarely use their wings and usually the beetles are brought from place to place with goods or packaging. The newly hatched larvae are active, but once they have found a food source, they become obese, curved and almost motionless. The larvae can spin webs and are often protected by loosely spun cocoons. Spider beetles are not picky. They appear as waste eaters in especially pigeons’ nests, a…