…ts body. The larvae then moults again to produce a hard, angular, immobile pupa (Page 24). These pupae can be found in houses and other sheltered places throughout the winter. The adult butterflies emerge from them in the spring and fly out into the open. Sometimes, instead of pupating in the normal way, a cabbage white caterpillar will stop feeding and a mass of tiny larvae will crawl out of it; sometimes they come out of the butterfly pupa. Thes…
Search Results for: Cabbage butterly pupa
Ladybugs
…e larva will nourish on the aphids over the next few weeks, after which it pupates. The pupa sticks to the surface and is completely immobile. A few days later, the adult ladybug emerges from the pupa. In Denmark, there are at least two generations of ladybugs per. year. Nearly all species of ladybugs feed on aphids during the warmer months. But they can also be found in fruits when the weather starts to get colder. The Harlequin ladybug is more a…
Bumble bee wax moth
…e to a protected area nearby. Here they jointly spin a pupa, in which they pupate together. Such a pupae can hold hundreds of small pupates spun together from an incredibly strong silk. These pupae can appear in unusual places in the garden. And it is not unheard of to come across a pupa on stored garden furniture, behind pots and utensils or in the firewood pile. These pupas’ webs can be quite difficult to remove, as they are often spun heavily a…
Housefly
…as the adult fly. When the larvae hatch from the egg, they enveloped in a pupa for a few days, where they develop into an adult housefly. After the pupa stage they move along walls and crack to a dark hole. In the dark hole, they develop and unfold their wings. After 24 hours, the flies can fly, eat, and mate. Biology and behavior The housefly often lives in places where there is fertilizer or manure, which can be found on farms and the like. The…
Pale mottled willow
…and the warmer spring weather starts, the larva emerges from its homemade pupa and transforms into a butterfly. Damage The “roof worm” is not harmful in any way, as it cannot sting or bite. However, it can be annoying when you are in the process of laying a new thatched roof, and they just suddenly peep out. The “roof worm” can however gnaw in different places in the roof as well as on textiles. The damage is however it not that great, but it can…
House longhorn beetle
…ear its gnawing sounds. Below the surface of the tree, it arranges a small pupa in an extended area at a time. Here, the transformation takes place from first pupa and then adult house longhorn beetle. When the development is complete, it breaks out of the surface of the tree through its flight hole. Preferably on a hot summer day. Together with the drill dust, the fly hole is a clear sign of the house longhorn beetle’s presence. The flight holes…
Animals that come inside for the winter
…hich 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 larvae and quite a few as pupae, e.g. cabbage white butterflies. There are others which spend the winter as adult insects, as for example lacewings, cluster flies and small tortoiseshell butterflies….
Australian spider beetle
…y to develop. The small larvae spin their own whitish cocoon in which they pupate. The cocoon has an almost tissue-paper-like appearance, and the webs of the larva can be seen as thin threads and spun cocoons in the infested area. The development from larva to fully adult thief beetle lasts about 3 to 4 months if the larva has good conditions e.g., at room temperature. When the larvae are fully developed, they most often leave this safe area. This…
Woodlouse
…oving the ventilation and heating in the premises. A good drying will make cabbage on the woodlouse, which will thereby become extinct by itself. They can then be removed with a vacuum cleaner. Sometimes the reason for a large number of woodlouse can be a hatchery near the home. For instance, in a compost pile, garden waste, a pile of straw or the like. Such piles should be removed, which can remedy the problem. It may be necessary to resort to…
Index
…se moth Brown rat droppings Brown-banded cockroach Bumble bees Butterflies Cabbage white butterflies Cadelle beetle Callidium violaceum Calliphora erythrocephala Camponotus herculeanus Carabus nemoralis Caradrina clavipalpis Carpet beetle Carpoglyphuslactis Case-bearing clothes moth Castor bean tick Cat flea Centipedes Cerambycidae Ceratophyllus sp. Chalcids Cheese fly Cheese mite Chelifer cancroides Chilopoda Chiroptera Chlorophorus annularis Chr…
Black flies
…Fig. 39. Black flies. From left: larva, pupa and adult. At the top: a leaf of an aquatic plant with black fly larvae and pupae. (Martini) The black fly (Simuliidae) is approx. 2 mm long, powerfully built flies. They are black and often have whitish markings on the body and legs. There are fifty different species of black flies in Denmark. They all need running water. Some species mate in streams, others in brooks and ditches….
Fruit flies
…vae seek into the food. At room temperature, the larvae leave the food and pupate after 4-5 days. In the pupa transformation to adult fruit flies lasts 3 – 4 days. Fruit flies can begin to lay eggs as early as 24 hours after leaving the pupal stage. Under favourable circumstances, at 25-30 ° C the lifecycle is completed within just 10 days. Fruitfly During the summer fruit flies breed in the wild, so one has to be aware of trash cans and compost p…
Woodboring beetle
…grown after two or three years. Once the larva is fully developed, it will pupate, which happens in the fall, and within a few weeks, the pupa will have developed into an adult beetle. However, the beetle will remain inside the tree until May-June, and then it will emerge from the tree, through a characteristic fly hole of a diameter of 2-3 mm. The dust from the fly hole will be dark yellow, as the wood the beetle feed on is rotten. The natural ha…
Insect development
…orphosis in which the eggs become larvae. The larvae grow large and become pupae, in which metamorphosis into the adult insect takes place. Insect development and metamorphosis are controlled by hormones. The hormones are formed in special glands on the lower side of the brain and in the prothorax. The hormones are distributed with the blood. It is a particular moult-inhibiting hormone that starts the moulting. Although it is formed in glands in t…
Exit-holes in timber
…les and moths sometimes gnaw their way into timber when they are about to pupate. The pupal tunnels are gnawed from the outside and usually end blind, but if there are many of them the timber may be riddled with a labyrinth of tunnels. There is no wood dust in these tunnels, but empty larval casts are nearly always found. The pupal tunnels of larder beetles are circular in cross section, with a diameter of c. 4 mm (seep. 120). Australian spider…
Sheep ked
…soon as the eggs are placed, they immediately begin to pupate. A sheep ked pupa grows between three and four millimeters long. In the beginning it is golden brown, but gradually it becomes more black-brown and shiny. The empty pupae remain in the sheep’s wool afterwards, and the pups can be found all year round in the wool. Damage There is no doubt that the sheep ked can be extremely unpleasant and troublesome to its host, for the fly can move agi…
Drone fly larva
…va, creeps out on to the land and seeks a suit- able dry place in which to pupate. In so doing it may enter porches or cellars. The pupae are 10-12 mm long, grey-brown, almost oval, but they retain the long ‘tail’ and look somewhat like tiny grey mice. From the pupa emerges a hoverfly, but unlike those •already mentioned, this species is remarkably like a honey bee (see p. 31). Some hoverfly larvae can live in carrion and these have given rise to…
Banana flies
…larva to adult banana fly. A process that lasts 4-5 days, after which they pupate. Inside the pupa – which roughly resembles a small brown seed – the process continues and the transformation into an adult fly is completed. This takes another 3-4 days. The banana flies do not consider idleness as soon as they are fully grown. Already when they are 24 hours old, they start laying eggs themselves. If a banana fly has all the circumstances in its favo…
Tetropium luridum
…follows the grain of the wood, the tunnel having a total length of 4-6 cm. Pupa passages from black spruce beetle, Tetropium castaneum var. luridum When fully grown the larva makes a slightly enlarged chamber, which it closes behind it with coarse wood fibres, and then pupates. When the adult beetle emerges it finds its way back along the tunnel, gnawing an exit-hole if there is still bark on the tree, and flies off. The total development normally…
Mill or flour moth
…lour and wander off to find a nearby crevice in which they can pupate. The pupa, which is 7 mm long, is completely enclosed in a thick, white silken cocoon. The adult moths emerge from the hiding places after 2-3 weeks. Mill moth larvae prefer wheat flour, but will also feed on all sorts of grains, cereals, seeds, macaroni, dried fruits, cocoa, nuts and almonds. In mills the silken threads may cause a blockage of piping, funnels and sieves, so tha…
Flies
…ave no elytrons. The flies that play a role in food have soft probosces. Flies have complete metamorphosis (see Fig. 3.5). The larvae, known as maggots have no legs. Nor is the maggot’s head visible. The head is very small and averted into the body. Pupation occurs in a capsule, a pupa, which is formed by the exoskeleton of the previous larval stage. Some flies are attracted to food, carrion, excrement and other waste, which means there will alway…
The Indian meal moth
…d temperature. Under optimal conditions at 25 °C, it takes just 35 days to fully develop. In unheated warehouses, progress is slow, and may only produce two generations per year. Larvae ready for pupation often crawl far away from whatever they matured in. The pupa, which is approximately 7 mm long, is completely entangled in a rather thick, white silk cocoon….
The saw-toothed grain beetle
…hich make it possible for the saw-toothed grain beetles to develop. Adult, pupa and larva of the saw-toothed grain beetle The optimal temperatures, which gives the shortest generation time is 31 to 34 ° C. At these temperatures, the number of the saw-toothed grain beetle in a population is increased by up to 50 times the original number within a month. In, for example, Danish grain storages, the species is not difficult to exterminate, but in Engl…
The lesser house fly
…icult to spot because whatever they live in, sticks to its outgrowths. The pupa resembles the larva much. At 18 ° C development from egg to adult lasts 21 days, and at slightly higher temperatures, 21-26 ° C, it is, not significantly lower, 18 days. Individual lesser house flies, which may live in birds’ nests, dog excrement, etc., can be found everywhere. Major invasions can almost always be traced back to a chicken or a mink farm. The larvae thr…
Rat-tailed maggots
…o develop into a hoverfly, it will leave the puddle to pupate. It can only pupate in a dry place. After pupation, the fully grown hoverfly emerges from the pupa. A hoverfly is a large fly, with a hairy body. Biology and behavior Rat-tail maggots gather in mud where they feed on microorganisms. They also eat decayed, organic material. This organic material usually decays due to unfavorable conditions, which in short means lack of oxygen or nutrient…
Flea bites
…scratching a hole with its thorn on the head. The last larval skin and the pupa skin are left in the cocoon. (Humphries) Fleas are mostly found on the ground or on the floor, and they will first and foremost attack ankles and lower legs. In contrast to bed bugs, fleas also crawl under clothing. Often they even bite in places where the clothes are tight. Bites during the night, especially on the thighs, buttocks and shoulders are also often caused…
Powderpost beetles
…a is fully developed, it gnaws below the surface of the tree, and where it pupates. Inside the pupa, the larva transforms into an adult powderpost beetle. The beetle leaves the tree through a small fly hole that is round and diameter vice about 1 mm. The larval passages are round and 1mm in diameter, they can go all ways into the tree. The drill flour is light, fine, and loosely packed. Normally the adult powderpost beetles appear from June to Aug…
Eggs and larvae
…ad for a moment. After four larval stages, the larvae have grown, and they pupate. They pupate in a cocoon of their own woven silk cocoon from the salivary glands. The cocoons are sticky, so they are usually covered in dust and dirt and are hard to spot. Inside the cocoon, the larva develops into an adult flea. After the transformation, the adult flea is ready to come out of the cocoon. It can wait, though. If the cocoon is placed somewhere comple…
Arthropod development
…ete metamorphosis (bed bug) Other insects, such as flies, beetles and butterflies, have complete metamorphosis, in which the young stages show no resemblance at all to the adults. Here a special immobile stage, the pupa, occurs between the larva and the adult. When the adult insect emerges from the pupal stage it ceases to grow, so there is no truth in the idea that, for example, small flies can become large flies….
Mason bee
…kin changes several times, and this stage takes a few weeks. Afterwards it pupates. The adult mason bee emerges from the pupa between spring and summer, depending on the specific species of mason bee. Damage The mason bees do not harm either humans or brickwork, despite their resemblance to plasterer bees, which can destroy brickwork. Mason bees exploit existing holes or hollows, but they do not make an existing damage worse with their presence or…