• Pepper weevil

  larva forms a cavity and covers it with its excrement, creating a type of cell, to be used later when it begins its metamorphosis. It develops a shiny white [...] since they throw themselves to the ground and keep still when they detect a threat. Damage symptoms The most significant damage occurs with the loss of [...] damaged. Lifecycle and appearance of the pepper weevil Newly hatched adults have a light brown colour, with an oval body measuring 2 to 3.5 mm in length, and

• Thrips

  larval instars, a pre-pupa and a pupal instar, and finally the adult insect. The eggs are kidney-shaped and have a white or yellow shell. Before a female deposits [...] in length. They have a distinctive elongated shape, with long, narrow wings that are fringed with fine hairs. Color: Thrips can be a variety of colors, depending [...] populations in check. Predatory mites in sachets can be a good preventive measure as the sachets enable a continuous supply of predatory mites even before the

• Tobacco whitefly

  symptoms The larvae of whitefly need a lot of protein for growth, and thus consume a large quantity of plant sap. This contains a high proportion of sugar, and [...] and subtropical countries of the world. The original habitat was probably a tropical or subtropical area, possibly Pakistan. The tobacco whitefly ( Bemisia [...] stadia remain flattened on the leaf. The fourth larva stadium develops into a yellow, almost circular so called pupa, in which the red eyes and white wings

• Cotton aphid

  appearance of Cotton aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour. In greenhouses [...] distributed throughout the world but prefers the warmer regions. It has been a pest in European greenhouses since the late 1980’s, particularly affecting [...] extract nutrients from the plant and disturb the balance of growth hormones. As a result, the plant’s growth is retarded giving rise to deformed leaves or, if

• Tomato russet mite

  Australia and is a pest in tomatoes in all areas where they are grown. Other members of the plant family Solanaceae may be affected to a lesser extent. Damage [...] The first nymphal stage is a transparent white colour and about 0.1 mm long. They usually develop to the 2nd stage within a day. All life stages look very [...] the contents of plant cells. Affected leaves are slightly curled and acquire a silvery sheen on the underside. Later they become brown and brittle. Badly

• Leek moth

  but mature larvae are ca 10 mm with a brown head capsule and . a yellowish-white body. Pupation takes place in a 10-mm-long, cream-coloured, silk cocoon [...] larval stages, a pupa and the adult moth. The eggs are small, white and elliptical and are laid singly on the leaf of Allium plants. After a wandering period [...] Male and female moth are 8-9 mm long, with a wing span of 15-16 mm. Their general colour is grey-brown with a typical white triangle in the middle of the

• Aphids

  have been described, and they can be found in a variety of habitats throughout the world. Aphids form a single, very large group of insects: the super- [...] length. They have a pear-shaped body with long antennae and two tube-like structures called tubercles on their rear end. Color: Aphids can be a variety of colors [...] ion. They may also excrete a sugary substance called honeydew, which can attract other insects and lead to the growth of a black sooty mold. Aphids life

• Tomato leafminer

  fruit. Pupation takes place in the soil or on the surface of a leaf, in a curled leaf or in a mine. If they leave the mines they build silk cocoons on the [...] greenish with a black band behind the head. The prepupae of the tomato leaf miner ( Tuta absoluta ) are lighter than the feeding larvae and have a typical pink [...] General The tomato leaf miner (Tuta absoluta), a major pest of field- and greenhouse-grown tomatoes, belongs to the family of Gelechiidae . It is oligophagous

• Horse-chestnut leaf miner

  lasts 25-35 days. First-instar larvae make only a small gallery. The second- and third-instar larvae develop a round mine of 4-7 mm diameter. The larva then [...] especially from July on, when the second and third generations develop. Trees with a low number of attacked leaves are not greatly affected, but when the entire [...] appearance of Horse-chestnut leaf miner The adult moth is 4-5 mm long and a rich brown colour with bright white chevrons edged with black. The larvae mine

• Garden chafer

  larval instars, a pupal instar and the adult beetle. Adult garden chafers ( Phyllopertha horticola ) have red-brown slightly hairy wings with a dark edge. The [...] General The garden chafer ( Phyllopertha horticola ) is a beetle from the Scarabaeidae family. It does most of its damage in the larval stage when it feeds [...] lying on the ground. Both adult beetles and larvae are polyphagous and feed on a wide variety of plant species. High populations of larvae can destroy plants