Pea leaf miner

occurs in a variety of vegetable and ornamental crops. It originates from South and Middle America and has subsequently spread via plant material. It is now [...] Life cycle and appearance of Pea leaf miner The life cycle of a leaf miner has the following stages: egg, three larval instars, a pupal instar and the adult [...] direct damage is caused by the larvae mining the leaf tissue, leading to desiccation, premature leaf-fall and cosmetic damage. In tropical and subtropical

May beetle

genus is the Phyllophaga . Given the external physical similarities between the adults and larvae of this genus, they are usually treated as a single [...] Initial damage is not visible in the aerial parts of the plant, as the larvae only feed on root hairs and organic material during the first and second instars [...] the position of the setae in their final abdominal segment is needed, although this is not a method which works for all species. They can best be identified

Koppert Foundation

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Leek moth

larval stages, a pupa and the adult moth. The eggs are small, white and elliptical and are laid singly on the leaf of Allium plants. After a wandering period [...] leek and onion, but also garlic and chives. Damage symptoms The vegetative and flowering stages are most widely affected, but the seedling stage is sometimes [...] but mature larvae are ca 10 mm with a brown head capsule and . a yellowish-white body. Pupation takes place in a 10-mm-long, cream-coloured, silk cocoon

American serpentine leaf miner

trifolii ) is highly polyphagous and thus lives on many host plants such as chrysanthemum, gerbera, gypsophila, celery, sweet pepper, pea, bean and potato [...] potato. In greenhouses, it is mainly found on gerbera and chrysanthemum. Today the insect is widespread across the whole world. Damage symptoms Leaf miners cause [...] directly and indirectly. The most direct damage is caused by the larvae mining the leaf tissue, leading to desiccation, premature leaf-fall and cosmetic

Cottony cushion scale

scale is a particular pest of citrus, Acacia spp ., Casuarina spp . and Pittosporum spp ., but it can damage many types of fruit and forest trees, and ornamental [...] tropical and subtropical countries of the world. It is also periodically discovered in greenhouses in temperate regions, but is not generally a pest in [...] ornamental shrubs and trees. Damage is mostly caused by sap depletion; the shoots dry up and die, and defoliation occurs. In addition, the copious quantities

European red mite

ulmi , is mainly a pest of fruit trees (apple, pear, plum and cherry). However, it can attack a large scale of other woody plants and is occasionally a problem [...] brown spots on the leaves and when these coalesce the leaves loose colour; this is often referred to as bronzing. When infestation is heavy, leaves can drop [...] 0.15 mm in diameter, dark red, and oval with small ridges running top to bottom, with a thin stalk on top. They look a bit like an onion. Adult females

Boisduval scale

the tropics, and in greenhouses in more temperate climates. It is very polyphagous and can be a pest of orchids, palms, pineapples, bananas and many other [...] very similar in their appearance and damage symptoms. Here, the Boisduval scale is described in more detail, as it is the most important one. The Boisduval [...] symptoms The first sign of Boisduval scale is the presence of the scales on upper and lower leaf surfaces, fruits, and stems of plants. On palms, Boisduval scales

Cutworms

negatively phototaxic and feed mostly at night and hide in the ground during the day. Damage from these instars is usually observed as a cutting of young seedlings [...] seedlings. Sometimes wilting is observed because of partial cutting. A larva often cuts one plant and quickly moves on to other plants and continues cutting. Therefore [...] Life cycle and appearance of Cutworms The adults of Agrotis spp. have pale grey to grey-brown forewings with a faint kidney-shaped marking and a red spot

Broad mite

the adult, but is slightly smaller and has only three pairs of legs. The emerging adult mite is roughly 0.2 mm long, oval and broad, and pale yellow or [...] growth. Leaf feeding is mainly concentrated on the underside near the leaf stalk, which tends to cause the leaf to turn brown and curl up. A typical indication [...] brown stripes forming a fine network on the leaves. In case of a more serious infestation, this network becomes so dense that there is no more green tissue