Latin: Hylobius abietis Black vine weevil Pine Weevil This beetle may occasionally be found indoors, sometimes in large numbers, although it really has no reason to be there. The larvae live in tree stumps and in the roots of diseased or dead conifers. The adult beetles may cause some damage outdoors because they gnaw shoots and twigs, but indoors they are quite harmless. The beetles occur particularly in new timber houses, and they are possibly…
Search Results for: Pine weevil
Rice weevil
…ce wise, the rice weevil is like the grain snout beetle. However, the rice weevil is smaller. A rice weevil is in average 2.5 to 3.5 mm long so there is not talk of a very large beetle. It may also look like a corn snout beetle, as the two species, at first glance appears almost identical. A rice weevil has four red spots on the coverts. The hind and front body are more even in size than with other beetle species, which tend to have a larger hind…
Grain weevil
…nown pests when it comes to grain stocks, although one can also find grain weevils in the home. Grain weevil can enter your home via grain such as oats, barley, and wheat. However, one can also find them in dog biscuits, bird seeds, pasta, and other grain items. Grain weevil do not live outdoors in Denmark, so they will prefer to stay close to the food they know they can live on. In the summer, however, they can hike far from their safe areas, as…
(7) The rice weevil and the granary weevil
…ach the temperate zones. At our latitude, both of these granivorous insects are synanthrope. The rice weevil requires more heat than the granary weevil to develop and it is not as likely to survive cold winters. In Northern Europe almost all grain stores are infested with granary weevils. Rice weevils are only seen after particularly hot summers. Based on the British statistics, we can expect that both species separately are imported by about 1% o…
The granary weevil
…nerations. For each new generation there will be at least 15 times as many weevils as there were before. The weevils look quite peaceful, but for every beetle, you see, 20-40 larvae are devouring their own cores. A granary weevil infestation begins locally in a so-called “warm pocket”. It is often an external event, which starts this pocket. Water could have entered through a leak. Cereals could have been unable to get rid of the excess water due…
Index
…h True weevils Tyroglyphus farinae Tyrolichus casei Vespoides Vespulae, Reesa Vinegar flies Violacea, Necrobia Warehouse moth Warehouse moth, tropical Wasps Weevil, coffee bean Weevil, common bean Weevil, corn Weevil, granary Weevil, rice Weevil, true White-marked spider beetle Yellow meal worm beetle Yellow-necked mouse Zeamais, Sitophilus Zacheri, Lardoglyphus…
The rice weevil
…ce weevil is on average slightly smaller and moves faster than the granary weevil. The rice weevil, unlike the granary weevil, flies, and in its natural habitats, in warm countries, it infests grain while it matures in the fields. In Northern Europe, however, it is most common in imported cereals, mainly rice. In terms of biology and harmfulness rice- and granary weevils are very similar, but the rice weevils’ multiplication rate is twice as high…
The common bean weevil
…evil is a member of the Bruchidae family, it is also subject to the import restrictions that apply to this entire family, see above. Common bean weevils are exterminated in the same manner as granary weevils….
The coffee bean weevil
…ean roasting, and the damage done by these weevils should probably rather be considered from an economic perspective (weight loss during storage) than from hygienic-culinary beliefs. The coffee bean weevil is actually not a bean weevil, but belongs to a family that stands near the true weevils. Therefore, it is not subject to the restrictions relating to bean beetles….
The corn weevil
…consider the two species to be one….
Rice weevil
…(Latin: Sitophilus oryzae) This beetle is a little smaller than the grain weevil, and can be recognized by the four reddish spots on the elytra, which cover a pair of functional wings. Rice gnawed by rice weevil This is one of the most serious pests of cereal crops in the tropics and subtropics. It is often brought to northern Europe and is not uncommonly found in kitchen cupboards, usually in a packet of rice (see page 93). As in the grain weevi…
Index
…raoh ant Pholcus phalangoides Phthirus pubis Phymatodes testaceus Pieris brassicae Pigeon bug Pigeon tick Pigeons Pine sawyer Pine weevil Piophila casei…
Nutmeg or coffee weevil
(Latin: Araeocerus fasciculatus) Coffee weevil aka. nutmeg weevil This beetle lacks the well-developed snout of the curculionid weevils. It is widespread in tropical and subtropical regions and is often brought to Europe in goods. It is now found quite commonly in Britain, mainly as a pest in cocoa beans, nutmegs and coffee beans. It has on occasions caused serious trouble to coffee exporters in south-east Asia. It requires warmth and a high humi…
Pine sawyer
Pine sawyer ( Latin: Monochamus sutor ) This beetle is widely distributed in the conifer forests of northern Europe. The development normally takes one year. The eggs are laid in a depression which the female gnaws in the bark and the larva eats its way from there into the wood. Metamorphosis into the adult beetle takes place in the following spring in a special pupal chamber close to the surface of the tree, and the beetle gnaws its way out thro…
Common bean weevil
Common bean weevil (Latin: Acanthoscelides obtectus) This beetle mainly infests beans, but it may also occur in other related crops. It can lay eggs in fresh beans in the fields or in dried stored beans. The female lays several eggs in each bean. When the larvae are fully grown they gnaw their way out towards the surface of the bean and pupate, leaving a thin shell between themselves and the outside world. When the adult beetles are ready to emer…
Black vine-weevil
…Latin: Otiorrhynchus sulcatus) Black vine weevil This is one of the larger weevils. It moves around in a characteristic slow manner, and like all weevils it is vegetarian. The larvae live in the soil and feed on the underground parts of plants. The adults avoid the light and hide themselves during the day, often in the surface soil at the base of a plant, but they emerge at night to feed. They attack many different kinds of plant and may cause con…
Grain weevil
…lives a long time, at any rate until she has produced 200-300 eggs. Grain weevils can completely destroy a grain batch Grain weevils prefer wheat, rye and corn, but in default of these they may lay eggs in hard starch-containing products such as dry biscuits and pasta. The small larva has no limbs and cannot leave the grain. As it eats and grows the grain becomes a hollow husk by the time the larva is fully grown. It then pupates inside the husk…
Bean weevil
Latin: Acanthoscelides obtectus There are many different species within the bean beetle genus, which include Bruchus, Callosobruchus and Acanthoscelides. Common to them all is that they are serious pests. Especially in the warmer areas around the globe where they can ruin the harvest for the local farmers. The bean beetle originates from the tropical regions and is native to South America. But it is not unheard of for it to be shipped to other co…
True weevils snout beetles
…but this is often irrelevant, because they do not thrive in mature dry seeds in a warehouse. Among the many weevils only three species are able to breed in stored foods: the granary weevil, the rice weevil and the corn weevil. They belong to the genus Sitophilus, but are often described under their old name: Calandra….
Criocephalus rusticus
…ires the timber to be damp if it is to thrive. The larvae normally live in pine stumps, but may also attack dead or felled trees, or damp planking at the base of a stack. When the beetles are seen indoors they may have come from pine logs or from timber damaged by damp. In many cases worked timber may show signs of an old attack in the form of larval tunnels exposed by the plane. This would mean that the timber had been damp but had since dried ou…
Exit-holes in timber
…mely firmly packed in the tunnel and difficult to scrape out (see p. 139). Pine sawyer exit-holes in timber Pine sawyer The round circular exit-holes have a diameter af 5-8 mm, and normally open out through the bark. Worked timber often shows larval tunnels that the plane has cut through. In cross section, the tunnels are oval, measuring c. 8 x 3 mm. They are therefore similar to those af Criocephalus but contain no wood dust (see p. 139 ). Leptu…
Butterfly larvae hair
…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 hairs. In a few years, a species of the processionaries can be so numerous in oak forests in Southern Europe that people have to be warned against going in…
The Brown wood buck
…own wood buck (Criocephalus rusticus) is a common inhabitant of the Danish pine forests throughout the country. The brown wood buck belongs to the genus with the Latin family name Cerambycidae. Appearance The adult brown wood buck grows between 15 and 25 millimeters long and has a regular, almost matte brown color. The most striking feature of the brown wooden buck is its large feeler horns, which, is a bit reminiscent of goat horns. At the front…
Animals in timber
…h. There are certain structural differences between coniferous trees, e.g. pine or spruce, and deciduous trees, such as oak or beech, and it is often difficult to distinguish these two types on external features. The surest method of distinguishing them is on the presence or absence of true vessels. These are present in deciduous trees, but absent in conifers. These vessels are specially adapted for the transport of water. In some species these ar…
Callidium violaceum
…ered timber, and are common in firewood (only softwoods), and in planks of pine or spruce that still have the bark on. The larvae can thrive in timber until the whole of the layer between bark and wood has been used up, but the attack cannot spread to timber without bark. The best method of stamping out an attack is simply to remove the bark. As in the case of Ernobius mollis (p. 122), this species may also cause damage when panels or roofing are…
Index
…The American house dust mite The blue jellyfish The crab louse The Eastern Pine Processionary The European adder The European house dust mite The European viper The Greater weever The lesser weever The pigeon mite The red jellyfish The velvet mite The water scorpion Thrips Thunderblights Thunderbugs Thunderflies Thysanoptera Tick-para1ysis Ticks To feel lousy Tovinger Trachinus draco Trachinus vipera Trichodectes canis Trichomonas vaginalis Trimen…
House longhorn beetle
…e larvae gnaw further inwards, but no further than to the very core of the pine tree, which they cannot digest. There are many factors that come into play in relation to the larval development process. Under normal circumstances, the development from egg to adult beetle will last between two to five years, but it is also not without precedent that the development can last as long as 10 years. Here, temperature plays an important role first and for…
Where?
…mark, the harvest mite is mostly seen in Thisted and environs. The Eastern Pine Processionary with its etching hair is known from Dueodde on the island of Bornholm. The medicinal leech lives on Bornholm and in North Zealand. Black flies can form very large populations at the lower reaches of Gudenåens and Susåen. After traveling in southern Europe, bedbugs, house centipedes, scorpions, etc. can be brought home in luggage or camping equipment. Dogs…
Fungus in timber
…gnated but generally speaking this is protected naturally, e.g. in oak and pine. Once the source of the damp has been traced and suitable countermeasures have been taken, it would be advisable to identify the fungus involved. This will usually involve consultation with an expert, al- though in some cases an experienced building craftsman may be able to help. When dry rot has been identified it is essential that all the infected timber is removed a…
Wharf borer Beatle
…exclusively for dead wood. The female most often prefers conifers such as pine, but deciduous trees can also be used for this purpose. Her larvae must live off the wood inside the tree. Therefore, the female has high demands in regard to the quality of the wood. Among other things, it is important that the wood does not dry out while the larvae are inside the wood. And the larvae also seem to thrive best if the tree is affected by a rot fungus an…