Lyprauta

appearance of Lyprauta The adults of the three species can be distinguished by the wing pattern of adults. Adults of P. trinidadensis have a variation of dar [...] damaged area, the roots produce large numbers of new branches. This ultimately results in a reduced number of flower stems and a longer vegetative stage. [...] their wings. Adults of L. cambria have a large dark-coloured mark on the apical wing parts as well as two smaller marks. Adults of L. chacoensis have only

Pine processionary moth

during the following summer because of the persistence of allergenic hairs in the remains of winter nests The larvae of the Pine processionary moth cause [...] the viability of oak trees. Life cycle and appearance of Pine processionary moth The female moth has a wingspan of 36-49 mm; the wingspan of the male is [...] serious in young reforested areas where it may lead to death of trees, directly or as a consequence of attack by bark beetles or other wood-boring insects. In

Citrus mealybug

an adequate intake of protein, mealybugs must therefore ingest large quantities of sap, getting rid of the excess sugars in the form of honeydew. Charac [...] hed from other mealy bugs by their possession of 18 pairs of relatively short wax rods round the edge of the body, and two slightly longer ‘tail filaments’ [...] cocoon, it goes in search of a female. A fertilized female lays several hundreds of eggs in an elongated cottony egg sac composed of white waxy threads. Once

Broad mite

indication of an attack of broad mite ( Polyphagotarsonemus latus ), is the appearance of dark brown edges at the base of young leaves. In case of a mild [...] caused by viruses. The typical pattern of damage consists of malformation and distortion of the above-ground growth of the plant. The mites show a preference [...] undersides of young, expanding leaves. Symptoms of an attack remain visible several weeks after the mites have been removed. Life cycle and appearance of Broad

Pea leaf miner

is affected. The size of a leaf tunnel depends on the stage of development of the leaf, the species of host plant and the species of leaf miner. The older [...] tomato and melon. Loss of leaves also reduces yield. In full-grown plants of fruiting vegetable crops, however, a considerable quantity of foliage can get damaged [...] These are mostly located at the base of the leaf. Life cycle and appearance of Pea leaf miner The life cycle of a leaf miner has the following stages:

Oak processionary moth

ea ), is a major pest of oak in many European countries. The common and scientific names of this moth refer to the behaviour of the larvae to form long [...] and also in parts of the Middle East. Damage symptoms The nests of caterpillars on infested trees are clearly visible. The larvae of the oak processionary [...] building silken nests at the base of lower branches, on the trunks or at the base of the trunks, which may contain thousands of individuals. The larvae usually

Glasshouse potato aphid

aphid ( Aulacorthum solani) is a native European species of aphids , seriously affecting crops of sweet pepper in particular. These aphids further affect [...] pierces the leaves or the fruit of sweet pepper it secretes a toxic substance, which leads to deformations in the growing tip of the plant. Precisely where [...] piercing of the lower leaves in the crop can cause deformed growth above with lumpy leaves and curled leaf margins. The immediate effects of piercing by

Yellow rose aphid

probably of North American origin but is now widely distributed in Europe, North Africa, parts of Asia and South America. It attacks plants of the family [...] therefore need to extract large quantities of sap to get sufficient protein. The excess sugar is secreted in the form of honeydew, making the crop and its fruit [...] yellow rose aphid is also a vector of several viruses attacking strawberries and roses. Life cycle and appearance of Yellow rose aphid Aphids have a complex

Common asparagus beetle

host-specific pest of asparagus in most asparagus producing regions of the world. Damage symptoms Both adults and larvae feed on the leaves of asparagus. As [...] fluid, consisting of faecal material, which may contaminate the plant. Life cycle and appearance of Common asparagus beetle The life cycle of the asparagus [...] have two distinctive rows of white or yellow spots. Eggs are oval and black to greenish brown and laid singly or in rows of 3 to 10 eggs, standing per

Whitefly

Here are some of the common signs of whitefly damage: Yellowing of leaves: Whiteflies feed on plant sap, which can cause the leaves of infested plants [...] productive crops and prevent the spread of diseases. Biological control of whiteflies uses a combination of natural enemies and tools that target different [...] and stems of infested plants. Sooty mold: Honeydew can also promote the growth of a black, sooty mold that can cover the leaves and stems of infested plants