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 [...] region, the origin of its principal host plant, oleander. Damage symptoms The colonies of bright yellow aphids can easily be seen on the shoots of the host [...] host plants. The damage caused by the aphid colonies is mainly aesthetic due to the large amounts of sticky honeydew produced and the resulting black sooty

Black currant

About The black currant ( Ribes nigrum ) is a woody shrub and the plant is well known for its savory berries. It belongs to the family of Grossulariaceae [...] eae . The black currant originally comes from the milder regions of both central and northern Europe and northern Asia. The plants grows well in damp and [...] During summer, clusters of small and glossy black berries appear along the stems. These can be picked by hand or by machine. The berries are extremely rich

Buxus

About Some 70 species belong to the genus of Buxus of the family of Buxaceae . The plant is also commonly named box (mostly in English-speaking countries) [...] grow up to 2–12 meters. The tree’s leaves are usually small (some 1.5-5 cm long and 0.3-2.5 cm wide) and leathery and their shape is round to lanceolate

Boisduval scale

skins of the nymph form a light yellow spot near the centre of the scale called the exuvium. Adult females can produce up to 200 eggs and live up to seven [...] be a pest of orchids, palms, pineapples, bananas and many other plants. Damage symptoms The first sign of Boisduval scale is the presence of the scales on [...] tissue at the feeding site. In orchids, this scale tends to prefer the leaf midrib and the portion of the petiole that is covered by the sheath. Small infestations

Silver-Y moth

flower to flower, often resting with their wings folded roof-like above the body. The female lays up to 2,000 eggs on the underside of the leaves of their [...] leaves, accumulation of frass and destruction of growing points. Life cycle and appearance of Silver-Y moth The forewings of the silver-Y moth ( Autographa [...] shades of brown to grey, but the most distinctive feature is the irregular white mark. The hindwings are brown with a broad, dark band along the margin

Cherry

About The Prunus avium , usually referred to as wild cherry, sweet cherry, or gean, is a species of cherry and a flowering plant that belong to the rose [...] Himalaya. The sweet cherry is regarded as the most important ancestor of today’s cultivated cherry and it is one of two cherry varieties most of the current [...] from. The other variety is the sour cherry Prunus cerasus , which is primarily used for cooking. Every part of the cherry plant, except for the ripe cherries

Encarsia formosa

from the inside out by the developing larvae. The larvae feed on the internal tissues of the host, leading to its death and thereby contributing to the [...] carefully inside the greenhouse Bend and tear off the strips opposite to the mounting hole Make sure not to touch the pupae during handling Suspend the cards in [...] in the crop, if possible approximately 75 cm under the plant head Avoid to hang cards at places exposed to direct sunlight The dosage of En-Strip or Enermix

Southern European marshland pyralid

caterpillars often stay in the lower strata of the crop, sometimes attacking the stem of the plant as well as the leaves. Late instar larvae burrow into soft [...] weeds. The secretive habit of the caterpillars of this species makes them very difficult to control with synthetic pesticides. Damage symptoms The caterpillars [...] cinerea . In gerbera, the flower buds may also be eaten. It has even been known for the caterpillars to inflict damage to the roots of crops cultivated in

Wheat bunt

sporidia infect the wheat seedlings even before emergence and the fungi grow inside the plants to the growing tip. The fungi grow between the plant cells and [...] allowing the teliospores to fall to the ground. Additionaly, these teliospores contaminate healthy kernels, which in turn become a source of disease in [...] response to moisture and form basidiospores, also called primary sporidium. Two mating types are distinguished. The filiform basidiospores fuse in the middle

Dwarf bunt

sporidia infect the wheat seedlings even before emergence and the fungi grow inside the plants to the growing tip. The fungi grow between the plant cells and [...] as teliospores in the soil or on seed. The soil-borne teliospores are the main source of primary infection. The soil-borne teliospores may survive in soil [...] allowing the teliospores to fall to the ground. Additionally, these teliospores contaminate healthy kernels, which in turn become a source of disease in