Search | Koppert US

Grey mould

fungus in many environments. It survives in plant parts like bulbs and crop residues or as sclerotia (drought- and cold-resistant structures) in the soil [...] plants or plant parts in a closed plastic bag In tomato: prune with a knife and not by hand, to avoid rugged, irregular wound surfaces In cucumber: remove dead [...] lesion wilts and dies. In vegetables and strawberry, grey mould ( Botryotinia fuckeliana / Botrytis cinerea ) affects the fruit. In potted plants, the cuttings

The Importance of Quality at Koppert

Rhizoctonia solani

fungus, that is very persistent in the soil. It overwinters as mycelium or sclerotia in the soil and on crop residues. It is also seed-borne. Thanatephorus [...] as Rhizoctonia solani , the vegetative stage. It was long believed to be a sterile fungus, but recently it was discovered that the fungus produces basidiospores [...] res. These spores don’t play a role in the epidemics or dispersal of the fungus, only the mycelium is important in this context. Thanatephorus cucumeris

General conditions Koppert Biological Systems Inc.

parties is unable to meet its obligations on account of circumstances beyond its control, it shall immediately orally inform its contracting party thereof [...] agreement has been concluded, except in case the agreement has already been performed, in whole or in part, by us. 3.4 Article 3.3 shall apply accordingly [...] buyer does not meet his payment obligation in full within the term referred to in article 6.1, the buyer is in breach without any further notice of default

Powdery mildew

colonies mostly occur in these crops. In covered roses, the colonies appear first and foremost on the upper side of the leaves. In most crops, the white [...] hardens the cell walls and makes it harder for the fungi to enter the leaves To reduce chances of powdery mildew in greenhouses, it is advised to first ventilate [...] fairly similar in all plant-pathogen combinations. The symptoms are white fluffy colonies, first and foremost on the upper side of the leaf. In severe epidemics

Black leg of seedlings

Pythium affects roots, in particular those of seedlings. Infected plants lag in growth. Seedlings fall over (‘damping-off’). In slightly older plants, [...] Pythium is considered a ‘weak pathogen’, meaning that it can usually only affect plants that are in a sub-optimal condition or suffer from stress, caused [...] turn yellow, for example in flower bulbs. At first, the plants recover during the night, but later the plants wilt irreversibly. In potted plants the flower

Tomato pinworm

to 12 mm in size and their main characteristic is their mottled brown colouration. At 25°C, it survives for about a week, but in cooler places it can live [...] pinworm mainly attacks tomato, but it can also survive in other Solanaceae species, especially eggplant and potato. It is frequently confused with similar [...] that might be present, with which it shares similar habits. Due to the initial damage of the larva which forms a mine, it can be confused with the eggplant

American serpentine leaf miner

leaf miners. In gerbera, the larva of the American serpentine leaf miner (Liriomyza trifolii) eats its way outwards from its egg, so that its mines join [...] cosmetic damage. In tropical and subtropical areas this can lead to burning in fruit such as tomato and melon. Loss of leaves also reduces yield. In full-grown [...] exit hole in the leaf with its mouth parts. After roughly one hour the larva crawls out of the leaf and falls to the ground. This occurs in the early morning

Flowering potted plants

plants, the most common species are: Poinsettia is well known and popular for its large red, white and green leaves, especially around Christmas. Begonia is [...] these species are usually grown indoors and are used as ornamental houseplants in countries with colder climates. Kalanchoe is a tropical, succulent flowering [...] species belonging to the family of Crassulaceae . Hibiscus is well known for its large, ornate flowers which are trumpet-shaped. These flowers have five or