Yellow rose aphid

aphid , Rhodobium porosum , is probably of North American origin but is now widely distributed in Europe, North Africa, parts of Asia and South America. It [...] It attacks plants of the family Rosaceae and is a pest of strawberries and roses. Damage symptoms The yellow rose aphids usually live in young unfolded [...] same time, photosynthesis in the leaves is reduced, affecting production. The yellow rose aphid is also a vector of several viruses attacking strawberries

Black bean aphid

fabae , is widespread in temperate regions, where it is a serious economic pest of beans. It is highly polyphagous, and attacks a wide range of other crops [...] Economic damage by black bean aphid is mainly due to direct feeding damage. Indirect damage is caused through the transmission of plant viruses. Infestations start [...] younger parts of the plant but can spread all over the plant. Nymphs and adults extract nutrients from the plant and disturb the balance of growth hormones

Greenhouse whitefly

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 [...] es: If the population is very large, feeding on plant sap can affect the physiology of the plant, as a result of which growth is retarded. In full sunlight [...] transmitted. The consumption of plant sap and secreting of honeydew by whiteflies reduce the aesthetic value of crops. This is particularly important in

Vine mealybug

shape and has no wings. The body is covered with a fine waxy material and have 18 pairs of wax rods round the edge of the body, and two slightly longer [...] causing deformation and / or yellowing of leaves, sometimes followed by defoliation. The overall effect is a reduction of photosynthesis and therefore the yield [...] Plant sap is rich in sugars, but low in proteins. In order to gain an adequate intake of protein, mealybugs must therefore ingest large quantities of sap, getting

Tobacco whitefly

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 [...] es: If the population is very large, feeding on plant sap can affect the physiology of the plant, as a result of which growth is retarded. In full sunlight [...] n. Bemisia tabaci is known for the transmission of viruses, including TYLCV in tomato. The consumption of plant sap and secreting of honeydew by whiteflies

Strawberry aphid

Damage symptoms Chaetosiphon fragaefolii is one of the most serious pests affecting strawberry plants. Direct damage is caused by the aphids sucking sap from [...] honeydew. The strawberry aphid is an important vector of several plant viruses affecting strawberries. Life cycle and appearance of Strawberry aphid Aphids moult [...] Reproduction of the strawberry aphid is exclusively by parthenogenesis, with unfertilized viviparous females continuously producing new generations of females

Glasshouse potato aphid

glasshouse potato aphid ( Aulacorthum solani) is a native European species of aphids , seriously affecting crops of sweet pepper in particular. These aphids [...] the fruit of sweet pepper it secretes a toxic substance, which leads to deformations in the growing tip of the plant. Precisely where the plant is pierced [...] their presence in the crop. The wingless adult stage of the greenhouse potato aphid is rather squat, of medium size (1.8 - 3.0 mm long) and oval in shape

Potato aphid

stripe is dark green, while in pink specimens it is dark red. This longitudinal stripe is specifically characteristic of the potato aphid and is particularly [...] aphid ( Macrosiphum euphorbiae ) is of North American origin, but is these days distributed throughout the world. It is a highly polyphagous species with [...] 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

Long-tailed mealybug

but these days it is widespread throughout the world. The range of host plants of Pseudococcus longispinus is less extensive than that of the citrus mealy [...] the body itself. The length of the other filaments is roughly half the width of the body. The female is 3 - 4 mm long. Reproduction in Pseudococcus longispinus [...] causing deformation and / or yellowing of leaves, sometimes followed by defoliation. The overall effect is a reduction of photosynthesis and therefore the yield

Dacnusa sibirica

orientation of the wasp within the host pupa is the same as that of the leaf miner itself, the head of the wasp thus developing where the head of the leaf [...] with the larvae of Liriomyza trifolii than with the larvae o f Liriomyza bryoniae , it is perfectly capable of developing in the larvae of both species. [...] appearance of Dacnusa sibirica The life cycle of Dacnusa sibirica consists of an egg, a larva, a pupa and an adult. In order to see the eggs and larvae of the