FAQ Nematodes

will first have to look for a host. The effect of treatment is thus strongly dependent on how quickly a nematode has found a host. Is the effect visible [...] matter to provide a rich soil life. How do entomopathogenic nematodes work? Nematodes are actively looking for a host or using an ambush strategy to reach [...] their host. Once in contact with a host, they try to penetrate it through a body opening. In the host, the nematodes release a bacterium that can kill the host

Fusarium wilt

General Fusarium is a group of soil-borne fungi with many different species. Fusarium is widespread and can infect a range of host crops. Many species [...] many different formae speciales which are each selectively pathogenic on a limited number of crops. Even within one crop, different formae speciales may [...] oxysporum life cycle, is similar to that of most Fusarium species. Fusarium overwinters for many years in the soil and on crop residues of infected plants

Crazy roots, hairy roots, crown gall

tissue and causes a genetic change in the plant. How to prevent Crazy roots, hairy roots, crown gall Use clean propagation material Use a strict hygiene protocol [...] galls on the stems, which are first white and later turn brown. Only Rhizobium radiobacter causes galls and tumours on underground plant parts and on the [...] disease seems to be caused by a change in the hormonal system of the plant resulting from the Rhizobium infection. Rhizobium rhizogenes puts a Ri-plasmid

Hop

grower with the ability to extend up to 20 inches a week, and even 50 ft tall in one season. They are typically trained on strings up to 25 ft tall. The hop [...] frequently referred to as hops “vine”, this plant is technically a bine. Bines have stout stems with stiff hairs to aid them in climbing. They are a vigorous grower [...] hop is native to the temperate Northern Hemisphere where currently the most acreage of production occurs. Although these plants have a very long life cycle

Black rot of carrots

Post-harvest storage at 0-1 o C. A. brassicae and A. brassicicola : adjust the sowing date to avoid conditions conducive to infection. In greenhouses: avoid [...] up to 8 years. Damage symptoms Black rot of carrots ( Alternaria radicina ) causes death of seedlings and dark brown lesions with a yellow halo on leaves [...] Alternaria radicina ) is a seed-transferred carrot disease. The seeds are the main source of primary infection and this may lead to death of seedlings. From

Municipality Enschede: Entonem nematodes against oak processionary caterpillar

time in the spring of 2021 to try to halt the spread of the oak processionary caterpillar. The municipality’s built-up area has a total of 22,000 oak trees [...] treated a total of 2600 to 3000 oak trees with nematodes.’ Maintenance of biodiversity The municipality also used pheromone traps last summer, to help it [...] information, and based on the nuisance that we experience, we’ll be able to decide whether to expand the use of nematodes in following seasons,’ explains

Bacterial canker of tomato

years. On other fields on the same farm, no seed potatoes can be grown for one year after infection. Damage symptoms Clavibacter causes spots on stems, [...] They turn brown but don’t fall off. On stems and shoots light stripes form, which then tear, allowing cankers to form. On tomato leaves, water-soaked lesions [...] greenhouse structures Use a crop rotation in field crops of at least two years and alternate with a non-host crop Apply deep-ploughing to stimulate the decay

Thripex-Mini

have a very short life expectancy and therefore need to be introduced to the crop as soon as possible after receipt. Failure to do so can have a negative [...] is recommended to carry out a small field test to monitor the effects. Best working conditions The predatory mite is not susceptible to diapause and therefore [...] cause slight damage to some crops, especially with a large number of mites and high humidity. Therefore consult your supplier prior to using Thripex and

Phytophthora blight

growth on the leaves. The centre is grey-brown with a light-green edge. On the stem, elongated brown lesions occur, usually circling the stem. On potato [...] For germination on above-ground plant parts, leaf wetness is required. Dispersal is by wind and rain causes the pathogen to be returned to the soil from [...] Zoospores are spores with flagellae which enable them to move through water. Infection is usually from the root to the foot, but direct infection of the foot also

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