• Black rot of carrots

  January 1, 1970

  temperatures from 2-4 °C up to 28-30 °C (optimum temperatures lie between 15 and 28 °C) and at a relative humidity (RH) of over 90% or when the leaves are [...] ). Prevent damage during harvest (in potato and carrot). Post-harvest storage at 0-1 o C. A. brassicae and A. brassicicola : adjust the sowing date to avoid [...] Alternaria species is the asexual stage. Conidia and mycelium overwinter in the soil and on crop residues and cause primary infection of the leaves. Survival

• Deltatrap

  January 1, 1970

  monitoring and trapping male moths and mealybugs in protected and outdoor crops in combination with a species-specific pheromone. Pests Moths and mealybugs [...] covered by insects and/or debris Dosage Use two or four traps per hectare for every species of moth to be monitored Use one trap per 500 - 1000 m² for mealybug [...] Presentation One trap with suspension hook and one sticky insert. Preparation Fold the trap into a triangle Place a sticky insert at the bottom of the trap

• Soybean

  January 1, 1970

  America) or soya bean is a so-called legume and indigenous to East Asia. It is extensively cultivated for its edible beans. The fruit of the plant is a hairy [...] (1-3 inch) and contains two or four seeds that measure 5-11 mm in diameter. Soybean seeds vary greatly in size and the hull can be black or brown, but [...] Argentina, Brazil and the United States. Soybeans are now an important global crop can be used as food crop, but also provide oil and are a major source of

• Glasshouse potato aphid

  January 1, 1970

  with a brown head, a dark thorax and a dark abdomen that has pale to dark transverse bands. The body shape is similar to wingless females, but is 2.0-3 [...] cycle Glasshouse potato aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour. When reproduction [...] mm long) and oval in shape. It has a light yellow-green to brown-green colour, and has an overall shiny appearance. Antennae are marked by a number of

• Spidex Vital lives up to its promises

  January 1, 1970

  necessary populations three times. This is always a critical and tense moment on cucumber farms like mine. And as spider mites can cause real problems in this [...] However, it is a new product and Koppert may provide amended recommendations for use nearer the time. We may need to apply it more often or release greater [...] shall see.’ A more robust system Based on his initial experiences, Sjaak van Dijk is pleased with Spidex Vital. ‘It’s a good sign if you have a predatory

• Oleander aphid

  January 1, 1970

  also called the milkweed aphid, is a common pest of several important ornamental plants in the families Apocynaceae and Asclepiadaceae. It is commonly found [...] found feeding on oleander and milkweeds ( Asclepias sp.). The oleander aphid is cosmopolitan, and can be found in tropical to warm temperate regions throughout [...] Life cycle and appearance of Oleander aphid The oleander aphid is an obligate parthenogenetic species; thus the adult aphids are all female and males do

• Citrus leaf miner

  January 1, 1970

  enter the leaf tissues of tender leaves and feeding on them produces snake-like mine. This causes the leaves to curl and twist. Severe infestation causes the [...] the leaves turn pale, curl badly, dry off and growth retardation of younger trees. Life cycle and appearance The moth lays the eggs singly up to 50 on lower [...] after hatching from the egg and starts mining between the two layers. The larvae excrete their faeces into the mine forming a visible trail. Pupation occurs

• Disclaimer

  January 1, 1970

  use of the website or another website linked to this website; loss to computer hardware and software, viruses and other problems, and/or loss of time due [...] offers and work performed by Koppert. These General Conditions also apply to all Advice and Services provided by Koppert. (art. 2.1) General Terms and Conditions [...] recommendations, and/or advice contained on this website. The information contained on www.Koppert.com is without obligation and does not constitute a legally-binding

• Thrips

  January 1, 1970

  greenhouse and field crops. Their feeding and virus transmission cause leaf deformation, silvering and fruit damage, leading to reduced yield and marketability [...] Predatory mites and bugs actively control thrips larvae and pupae, while beneficial nematodes target pupae in the soil. Sticky traps and kairomones support [...] With a serious infestation the leaves themselves can shrivel, and there can be varying levels of fruit damage depending on the species of thrips and their

• Cercospora leaf spot

  January 1, 1970

  Veni GoKlean at the rate 1.25 to 1.5 ml per litre of water at 12-15 days intervals as preventative spray and or after recognition of the disease symptoms [...] humidity favours the spread of the disease and severity. The fungus has the ability to overwinter in plant debris and remains in the field for long time. Management [...] circular with small to large grey centres and dark brown margins. The spots may enlarge to 1 cm to more and later coalesce. The spots dry up results in