• Tobacco whitefly

  although strictly spoken this is not true) and adult. The larvae are found on the underside of young leaves and have an oval shape. The first instar larvae (crawlers) [...] which the red eyes and white wings of the adult are already clearly visible. These pupae are found on the oldest leaves. The adult emerges from the pupa [...] sugar, and the excess is excreted as honeydew, with larger larvae expelling large quantities. The damage that whiteflies cause to a crop is the result

• Black vine weevil

  caused by the feeding of the larvae on the roots. After the roots have been destroyed the larvae move into corms, rhizomes and stem bases of plants. Larvae [...] strawberries and other fruit crops in both temperate and sub-tropical regions. It belongs to the family Curculionidae. Damage symptoms The major damage is caused [...] vegetables and fruit crops but reduces the value of ornamental plants. Life cycle and appearance of Black vine weevil The life cycle of the black vine

• Brown soft scale

  can cover the leaves, flowers and fruit of the host and reduce photosynthesis and respiration. Life cycle and appearance of Brown soft scale The scale of [...] of the scale darkens as the female ages. The size, shape and characteristics of the female also vary with different host plants. The middle of the scale [...] C. hesperidum is often attended by ants. The ants will clean and protect the coccids and in turn benefit from a rich food source. The honeydew also quickly

• Pepper weevil

  during the cooler parts of the day, as this is when they are most active. Another recommendation is to inspect the ground as well as the flowers and immature [...] causing the stalk and calyx to turn yellow before wilting and dropping off. When you see fruit on the ground, it is clear that the crop has been very severely [...] hing feature is a ‘snout’ which is longer than their head and prothorax. Two days after hatching and feeding, they begin to copulate and subsequently lay

• American serpentine leaf miner

  roughly one hour the larva crawls out of the leaf and falls to the ground. This occurs in the early morning. The larva crawls into the ground to pupate [...] directly and indirectly. The most direct damage is caused by the larvae mining the leaf tissue, leading to desiccation, premature leaf-fall and cosmetic [...] potato. In greenhouses, it is mainly found on gerbera and chrysanthemum. Today the insect is widespread across the whole world. Damage symptoms Leaf miners cause

• Tomato russet mite

  population growth is most rapid and affected leaves dry out quickly. The damage is first seen on the lower part of the plant and moves upwards as the mites ascend [...] snap. The fruit can also be affected, and when this happens in tomatoes, the skin becomes coarse and turns reddish brown and the fruit itself is sometimes [...] (torpedo-shaped), soft and segmented. The body appears to be divided into two parts: the head with the mouthparts, and the rest of the body. All mobile stages

• Tarnished plant bug

  General The lygus bug (or tarnished plant bug) is native to North America, and it is especially common across the eastern half of the continent, from northern [...] from the edges of nurseries, and destroying favourable overwintering sites. Damage symptoms Lygus bug adults and nymphs attack the seeds, buds and flowers [...] migrating into crops throughout the spring and into summer. As they feed, they lay their eggs on crop stems and, if the weather is warm enough, can produce up

• Rose aphid

  presence in the crop. Wingless females of the rose aphid are 1.7-3.6 mm long and green or deep pink to red-brown. The antennae and sometimes the head is dark [...] General The rose aphid, Macrosiphum rosae , is a serious and often abundant pest of roses. It is virtually cosmopolitan and widely spread in Europe. Damage [...] Infestations with rose aphids retard the growth of buds and new shoots. Foliage and flowers are often disfigured and contaminated with sticky honeydew on

• European red mite

  initially brown spots on the leaves and when these coalesce the leaves loose colour; this is often referred to as bronzing. When infestation is heavy, leaves can [...] yellowish red, and more slender and tapered near the hind end. The development from egg to adult goes faster at higher temperatures and takes approximately [...] generations in one year. The European red mite overwinters in the egg stage; the “winter eggs” are laid in the wooden parts of the host plants in autumn.

• Impatiens thrips

  occurs 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 [...] 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. [...] sweet pepper, cucumber and eggplants. It lives exclusively on the leaves and is often present on weeds in greenhouses. Life cycle and appearance of Impatiens