Goat moth

larvae bore into the bark and down to the sap wood. Development takes 3 or 4 years. The larvae feed on the wood most of the time hibernating in their galleries [...] from the bark of attacked trees. The larvae emit an unpleasant goat-like smell. Trees eventually die. Life cycle and appearance of Goat moth The wingspan [...] spines on the abdominal segment. The moths fly at night in June or July and lay eggs on tree trunks in batches of up to 50. After the eggs hatch, the larvae

Lyprauta

earthworms of the family Enchytraeidae. Life cycle and appearance of Lyprauta The adults of the three species can be distinguished by the wing pattern of adults [...] mark on the apical wing parts as well as two smaller marks. Adults of L. chacoensis have only one small dark-coloured spot on their wings. The eggs of Lyprauta [...] Especially the root tips are affected. They become black and start to rot internally. Just above the damaged area, the roots produce large numbers of new branches

Horse-chestnut leaf miner

true cocoon in the mine. The percentage of larvae which spin true cocoons increases in each of the subsequent generations. Adults of the first generation [...] may cover the entire surface of the leaflets, especially from July on, when the second and third generations develop. Trees with a low number of attacked [...] in the firsts instar up to 3.5 mm in the fourth instar. The pupa is brown and is 2.9-4.5 mm long. The horse-chestnut leaf miner overwinters in the pupal

Glasshouse potato aphid

deformations in the growing tip of the plant. Precisely where the plant is pierced is unimportant. The piercing of the lower leaves in the crop can cause [...] leaves and curled leaf margins. The immediate effects of piercing by the aphids are visible in lower leaves in the form of yellow patches. Heavy yellowing [...] a number of darker bands, and their length exceeds that of the body. The legs are also long, there are two distinctive dark green spots on the abdomen at

Cottony cushion scale

period of 2 to 3 months. After leaving the egg sac, the crawlers settle along the midribs and veins of the leaves. The next two instars migrate to the larger [...] series of uniform ridges running lengthwise over the surface. The ovisac may reach the same length as the body, giving an overall combined length of up to [...] biological control. The cottony cushion scale has subsequently spread widely through most of the tropical and subtropical countries of the world. It is also

Oleander aphid

rather than eggs and that the progeny are clones of the adult female. The nymphs feed in colonies on the shoots at the top of the plant. Nymphs progress through [...] shoots of the host plants. The damage caused by the aphid colonies is mainly aesthetic due to the large amounts of sticky honeydew produced and the resulting [...] General The oleander aphid, Aphis nerii , sometimes also called the milkweed aphid, is a common pest of several important ornamental plants in the families

Hemp russet mite

segmented. The body appears to be divided into two parts: the head with the mouthparts, and the rest of the body. All mobile stages have only two pairs of legs [...] Damage is caused by the mites sucking out the contents of plant cells. Hemp russet mite develops on the stems and petioles of the hemp plant and can cause [...] cannot survive on other plants. Life cycle and appearance of Hemp russet mite All life stages of the hemp russet mite are extremely small and difficult to

Impatiens thrips

patches on leaves and the black dots of their excreta indicate their presence in the crop. The vigour of the plant is reduced by loss of chlorophyll. When [...] on the plant, specifically on the leaves. Eggs are deposited in the leaf tissue, while subsequent stages are found on the upper- and undersides of the [...] on the leaf rather than on the ground. The prepupae and pupae remain immobile on the leaf tissue. Adults are found on both upper- and undersides of the

Diamond back moth

antennae. The hindwings are narrow, pointed toward the apex. The tips of the wings appear to turn upward slightly when viewed from the side. In males, the upper [...] upper edge. In females, the upper two-thirds of the forewings are light ochreous and the markings are like those of the males. The back is marked with a [...] and active. Except for the first instar, which mines in the leaf tissue, the larvae are voracious surface feeders. The pupae of the diamond back moth (Plutella

Garden chafer

on roots of grasses and clover. The adults feed on the leaves of trees like oak, hazelnut and birch and on the flowers and developing fruits of, for instance [...] and fruit crops but reduces the value of ornamental plants. Life cycle and appearance of Garden chafer The life cycle of the garden chafer ( Phyllopertha [...] three pairs of legs, of which the middle and hind pairs are approximately the same length. Pupation takes place around March or April. The pupae are c