Potato aphid

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 deformed [...] early enough in the season, the death of young plants. Retarded growth and defoliation reduce yield. Plant sap is rich in sugars, but has a low protein content [...] Solanaceae (particularly potato), but has also been identified on more than 200 plant species from more than 20 families. Various vegetable and ornamental crops

Green peach aphid

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 deformed [...] early enough in the season, the death of young plants. Retarded growth and defoliation reduce yield, Plant sap is rich in sugars, but has a low protein content [...] greenhouse crops. The aphid may originate from Asia, where its winter-hardy host plant, the peach tree, is native, however it is now a pest with a world-wide d

Broad mite

species that feed on fungi, algae, plants, as well as insect and mite predators and parasites. Those living on plants can cause considerable damage to their [...] distortion of the above-ground growth of the plant. The mites show a preference for young, developing plant tissue, like the growing tips, young leaves [...] affected plants acquire a misshapen appearance, with contorted leaves and sporadic brown discolouration caused by cork formation. When plants are severely

Click beetles

the roots of many plants. Damage symptoms The click beetles feed on the roots and bore into the base of plants. This can cause the plants to wilt and die [...] die. Damage is more severe in young plants. Life cycle and appearance of Click beetles Adult Agriotis sp. are 6-10 mm long and yellowish brown to black. The

Early blight

conducive to infection. In greenhouses: avoid high RH. Prevent plant diseases by optimizing plant potential and crop resilience. [...] rain. How to prevent Early blight Remove crop residues, weeds and volunteer plants. Use clean seed and propagation materials. Practice crop rotation, in particular

Leaf miners

This is a family of small flies whose larvae tunnel into the leaves of plants, creating ‘mines’. There are many species of leaf miner affecting various [...] Life cycle of leaf miners Leaf miner damage Leaf miners cause damage to plants both directly and indirectly. The most direct damage is caused by the larvae [...] such as tomato and melon. Loss of leaves also reduces yield. In full-grown plants of fruiting vegetable crops, however, a considerable quantity of foliage

Western flower thrips

necrotic spot virus (INSV). Both viruses affect a wide range of plants, and often a single host plant may be infected by both viruses. [...] flower thrips (Frankliniella occidentalis) can be found on a wide variety of plants, including many vegetable and ornamental crops in greenhouses, and on various [...] flower petals and in the soft parts of stalks. They are inserted into the plant tissue with a saw-like ovipositor. Larvae are nearly transparent white or

Cactus mealybug

Depending on the host plant species, infestations with cactus mealybug cause discoloration of the plants and later necrosis of the tissue. Plant deformations can [...] around the world as it was probably distributed by the trade in ornamental plants. Damage symptoms The cactus mealybug usually infests stems but can occasionally [...] can also occur. Heavily infested plants stop growing and will eventually die. Life cycle and appearance of Cactus mealybug Mealybugs get their name from

Rose

flowers the plant bears. There are more than one hundred rose species and thousands of different cultivars. The rose is a woody, perennial plant which usually [...] climbing or trailing with a stem that has sharp thorns. The flowers of the rose plant can vary in shape and size, but are often ornate and bright coloured. Colours

Broccoli

About Broccoli is a tasty, green plant. When it comes to botanical classification, the broccoli plant is categorized as part of the Italica cultivar group [...] r, which belongs to a different cultivar group of the same species. The plant has a large, flowering head that is usually green. The head looks a bit like