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| When Brachycera occur in large masses they can be very annoying and can, in certain cases, lead to significant damage to agriculture, especially in the meat and milk production industry. Due to the fact that some species of Brachycera t very often reside in feces and carcasses, they can transfer diseases. Some general examples of Brachycera are : Blow-flies, house flies and Mus... | | |
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| ...stroy entire harvests. Furthermore Bark beetles, Ips typographus, the Old-house borer and Mountain pine beetles destroy wooden structures, forests and woods. The Asian ladybird is among those considered useful , as it is the enemy of many pests in agriculture and forestry. | | |
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| Rove beetles | | ...hes in humans.
Some species of rove beetle can cause damage to strawberries or fruit trees. However, the rove beetle is enormously valuable for the soil and its remineralisation. Furthermore they eat many insects which are regarded as pests in agriculture and forestry. | | |
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| Green lacewings | | ...hest and abdomen segments, or are plump and have long bristles on the sides of the body.
Adult green lacewings fly at night and at dawn. They feed on pollen, nectar or honeydew. There are also species that are predatory. The latter are useful in agriculture as they eat insects, mites and aphids. | | |
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| Chrysoperla camea s. l. | | ...s. During the day they sit, hidden, under leaves. They overwinter in places where they are well hidden from other animals and insects. Their larvae are considered beneficial as they eat aphids (up to 10 per day) and aphids are viewed as pests in agriculture . In 1999, the Chrysoperla camea s. l. was declared Insect of the year. | | |
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| ...five days, the young adult wasps hatch. Some species specialize in spinning cocoons and live on their eggs.
Because the hatching wasps keep the populations of plant pests down, they are considered very useful. They are also actually used in agriculture to kill plant pests (aphids) or moths. | | |
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| Philanthus triangulum are widespread in the northern hemisphere, but rare due to strong natural fluctuations in population and the use of pesticides in agriculture. Under favourable conditions, this species reproduces twice a year. | | |
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| ...y increased in the last 30 years in Western Europe especially in Scotland and Ireland, this is attributed to climatic changes.However this species is in decline in Central Europe. Although numerous biotopes have been lost due to the expansion of agriculture onto meadow areas, the orange tip is not considered endangered. This species reproduces once a year. | | |
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| Harvestmen are only active at night and their behaviour is not affected by adverse weather conditions. Female harvestmen lay their eggs in small holes or cracks in the ground.
Due to the intensification of agriculture and forestry habitats have been lost and this is a real threat to many species of harvestmen.
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| Lace bugs cause negligible damage in Central Europe, however because they often occur en masse in the tropics, they can cause considerable damage in agriculture there. | | |
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