Leaf stripe

gradually extend and become brown and chlorotic and may merge. Eventually this leads to the death of the leaf. The leaf splits at the end which makes it look [...] first occur on the first, second and third leaf and subsequently on other leaves. Yellow stripes are formed at the base of the leaf and the leaf sheath. [...] may be stunted and heads may be distorted and failing to emerge from the sheath. Ear length and the number of kernels may be reduced and kernels may be

Fusarium wilt

First the leaves turn yellow and wilt, mostly on one side of the plant. Finally, the whole plant wilts. Other symptoms are brown discolouration of the xylem [...] xylem vessels which can be seen when the stems are cut. In banana, whole plantations may die and the soil may not be suitable for planting for many years [...] may occur and cause different symptoms. Fusarium oxysporum is the only Fusarium that actually grows inside the vessel system of the host plant and spreads

Tomato looper

spreads to several northerly countries and is now one of the most frequently found pest species in greenhouses. Damage symptoms The tomato looper (Chrysodeixis [...] white marks on the forewing that sometimes overlap each other. The hindwings are brown. The body is brown and hairy and, when at rest, the hairy dorsal plume [...] species originating in the Mediterranean and northern Africa. The larva is highly polyphagous and feeds on plants of over 20 families, among them crops such

Radish

consumed in all parts of the world. The seeds are used to produce oil. Other varieties are developed for sprouting and their roots and leaves are consumed either [...] domesticated in Europe in pre-Roman times. Radish comes in several varieties that all vary in flavour, colour, size and time it takes to mature. The vegetable [...] derives from the chemical components that are produced by the plant, namely glucosinolate, myrosinase, and isothiocyanate. Radish is now produced and consumed

Green peach aphid

different viruses and is thus rightfully feared by many growers. 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 deformed leaves or, if the infestation occurs early enough in the season, the death of young [...] quantities of sap to get sufficient protein. The excess sugar is secreted in the form of honeydew, making the crop and its fruit sticky. Black fungal moulds (

Damping-off

first, the plants recover during the night, but later the plants wilt irreversibly. In potted plants the flower buds fall off. The side roots rot and very [...] aphanidermatum mostly occurs at higher temperatures in the soil or irrigation water. Pythium aphanidermatum mostly occurs in young plants and damage is more [...] f’, hence the name damping-off disease. In slightly older plants, the leaves lose their turgor or the leaf tips turn yellow, for example in flower bulbs

Predatory mites

chemical pesticides. Koppert is the pioneer in the development of predatory mite solutions, starting in 1967 with the rearing of the predatory mite Phytoseiulus [...] essential to know where the pest is, how severe the infestation is and to identify the pest. Select the right predatory mite: Choose the appropriate species [...] deutonymphal and adult stages the mites feed almost continuously. Protonymphs and deutonymphs are similar to the adults in appearance, but smaller in size. Predatory

100% Sustainable Agriculture

you find the right solutions. We are a family business and the global market leader in developing sustainable solutions against diseases and pests for [...] that is the guiding principle in everything we do! Pioneering is not new to Koppert. In fact, it’s in our DNA. Fifty years ago our founder was the first [...] constantly testing them in the field together with you. Only with the help of your knowledge and experience can we move forward to develop the very best biological

Impatiens thrips

to adult on the plant, specifically on the leaves. Eggs are deposited in the leaf tissue, while subsequent stages are found on the upper- and undersides [...] of the leaf. Pupation occurs on the leaf rather than on the ground. The prepupae and pupae remain immobile on the leaf tissue. Adults are found on both [...] pigmentation between the segments, and the dark wings are white at the base. This colouration distinguishes the species from most other thrips species

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