Potato aphid

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 [...] production. Life cycle and appearance of Potato aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour [...] specifically characteristic of the potato aphid and is particularly visible in the nymphs. Immatures have a light dusting of whitish-grey wax. The aphids

Asian citrus psyllid

psyllid, ( Diaphorina citri ), is an important pest of citrus in several countries as it is a vector of a serious citrus disease called greening disease or [...] responsible for the destruction of several citrus industries in Asia and Africa. In North America, it has spread through most of the southern states and Mexico [...] stems and on leaves of all developmental stages. Nymphs feed on young leaves and stems, continuously secreting copious amounts of honeydew and a thread-like

Grape mealy bug

and grape bunches. Malformation of leaves and shoot tips due to infestation of growing points. Honey dew secretion of mealy bugs support sooty mould growth [...] growth on infected area. Young vines often die due to severe infestation of mealy bugs. Feeding damage in grapes is minimal but the marketability is greatly [...] making raisins. Life cycle and appearance Mealy bugs are found in crevices of stem, on leaves and berries. Mealy bugs are pinkish and covered with white

Spider mites and other mites

Biological control of spider mites and other mites uses a range of natural enemies that target different developmental stages of the pest: Predatory mites [...] on the leaves affect the appearance of the crop. This is of particular concern in ornamental crops. Life cycle of spider mites Spider mite control videos [...] are capable of causing severe damage very rapidly due to their great reproductive capacity. There are more than 1200 species worldwide, many of them are common

Rose aphid

abundant pest of roses. It is virtually cosmopolitan and widely spread in Europe. Damage symptoms Infestations with rose aphids retard the growth of buds and [...] develop. Life cycle and appearance of Rose aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour [...] with unfertilized viviparous females continuing to produce new generations of females. Aphids moult four times before reaching adulthood. With each moult

Green peach aphid

malformations of the growing tips. Life cycle and appearance of green peach aphid Aphids have a complex life cycle, with both winged and wingless forms of adults [...] families. Damage symptoms Of all the aphids , the peach potato aphid ( Myzus persicae subsp. persicae ) is the most important vector of viral diseases. It can [...] 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

Tea mosquito bug

leaves, tender stems and buds. The toxic saliva of the insect is injected to the plant tissues at the time of feeding causes reddish brown patches. As a result [...] die, curling of leaves, badly deformed and eventually fall off. The infested shoot also shows same such spots and subsequently drying of the shoots. Severely [...] and greenish brown wings. Females is capable of laying about 500 eggs. The eggs are laid in all tender parts of the plant. The freshly hatched nymphs are

Coffee

are the source of one of the most popular beverages in the world. They are in fact, not actual beans, but the seeds of Coffea , a genus of flowering plants [...] coffee beans. It is a member of the Rubiaceae family and grows on shrubs native to tropical and southern Africa and tropical parts of Asia. Grown widely in the [...] purple fruit called ‘cherries’. These contain two seeds, the coffee beans. One of the most widely grown coffee crops is the Coffea arabica which bears fruit

Cotton bollworm

armigera ) occurs in the tropics and sub-tropics of all continents except for North America. Larvae of the cotton bollworm ( Helicoverpa armigera ) are [...] mm in length and have a wingspan of about 40 mm. The grey-green males are smaller. The forewings are edged with a line of black spots, and the hindwings [...] flowers are attacked, and seed pods may be pierced. Life cycle and appearance of Cotton bollworm Eggs are deposited individually on young shoots near buds

Cotton aphid

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 [...] production. Life cycle and appearance of Cotton aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour [...] Nymphs and adults extract nutrients from the plant and disturb the balance of growth hormones. As a result, the plant’s growth is retarded giving rise to