• Caterpillars

  moth flying at night are usually inconspicuously brownish are greyish. Adult butterflies do not damage crops. Most of them feed on nectar. In contrast, [...] species are restricted to a single crop, most are polyphagous. Caterpillar damage Caterpillars can cause serious economic damage. Most species feed on leaves [...] Biological control of caterpillars Caterpillars are highly destructive pests that feed on leaves, stems and fruits, causing serious damage to greenhouse

• Fusarium head blight or scab

  leaves. The spores are dispersed upwards to the ears by splashing rain drops or wind. On the infected ears, the typical pink spores are produced which may [...] the soil and on crop residues of infected plants as chlamydospores (thick walled mycelium cells) or mycelium. Survival is also possible on seed, greenhouse [...] by direct infection of the foot by overwintering inoculum. On the infected foot, conidia are produced that further spread the disease. Gibberella zeae (Fusarium

• 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 [...] cells which are resistant to desiccation) or mycelium. Zoospores are formed from the overwintering structures which infect the host. Zoospores are spores with [...] of Phytophthora blight Phytophthora species are very destructive organisms belonging to the Oomycetes and are therefore strictly speaking not fungi. They

• Hop

  They are a vigorous 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 [...] flowering plants in the family Cannabaceae. Hops are the female flowers (seed cones, strobiles) of the plant and are considered the main flavor ingredient in making [...] for flavoring have dictated how long these plants stay in the ground. They emerge each year towards the end of Spring and are harvested near the end of Summer

• Licence permits release of Koppert Swirski Mite® in polytunnels in England

  January 6, 2021

  made possible by the participating strawberry growers who hosted the trials on their farms. Swirski Mite® contains the predatory mite Amblyseius swirskii [...] Forest Fruit Company, Brokenhurst, for allowing Koppert to carry out this work on their farms. We would also like to express our gratitude to DEFRA for granting [...] been increasing in tunnel strawberry crops in recent years.” Koppert has gained many years of experience with Swirski Mite® in various glasshouse crops

• Bacterial soft rot, bacterial stem rot

  tissue keeps its normal colour. On the fruits, lesions first are small and sunken, water-soaked and light to dark brown. They are adjacent to wounds and natural [...] pathogen in plants that are infected by other pathogens. The bacteria that causes black leg in potato is a different subspecies. How to prevent Bacterial [...] reach epidemic population densities. It can survive as epiphytic bacteria on various plants or in the soil in low densities. It has also been found in

• Wheat bunt

  stunted. Infected (bunted) heads are slender and remain green longer than healthy heads. The glumes are opened either on some or on all spikelets, showing the [...] soil or on seed. These teliospores germinate in response to moisture and form basidiospores, also called primary sporidium. Two mating types are distinguished [...] wheat. Damage symptoms Plantsinfected by Tilletia tritici and Tilletia laevis are hard to distinguish from infected plants before head emergence, although affected

• Aphidius ervi

  Expand all items How to use Aphidius ervi The parasitic wasp Aphidius ervi is available in a bottle ( Ervipar ). Spread the material on rock wool slabs [...] its introduction site for at least a few days The dosage of Ervipar depends on climate, crop and aphid density and should always be adjusted to the particular [...] Koppert advisor or a recognized distributor of Koppert products for advice on the best strategy for your situation. Best conditions for use of Aphidius

• Dwarf bunt

  causes (bunted) heads that are slender and remain green longer than healthy heads. The glumes are opened either on some or on all spikelets, showing the [...] Tilletia controversa survives as teliospores in the soil or on seed. The soil-borne teliospores are the main source of primary infection. The soil-borne teliospores [...] types are distinguished. The filiform basidiospores fuse in the middle with a basidiospore of the other mating type so that H-shaped structures are formed

• Spidex Vital® sets new standards in spider control

  May 12, 2021

  based on P. persimilis, but this comes with several new and interesting differences, which offer some new benefits. Spidex Vital ® has only been on the market [...] persimils to feed on spider mite prey for a day for it to synthesise the characteristic red-pigmentation. Growers and agronomists have commented how useful this [...] but already its performance is striking a chord with growers, and there are strong indications of widespread market acceptance. From baseline research