• Predatory mites

  pests, so knowing the target pest is crucial. Scouting is essential to know where the pest is, how severe the infestation is and to identify the pest. Select [...] that preys on the identified pest. Consult with a Koppert advisor or supplier if you're unsure. Release timing: Timing is essential and depends on factors [...] predatory mites feed on them by piercing their prey's body and extracting their bodily fluids, causing their death. As predatory mites feed on pests, they also

• Chrysopa

  their body fluids. Visual effect Prey is sucked out, shrivelled skins are difficult to find. Chrysoperla carnea is active mainly during the night. The larvae [...] before use Apply on infested leaves For hotspot treatments, apply Chrysopa directly in the heavily affected areas The product can be applied on the rock wool [...] weekly intervals until control is achieved. Consult a Koppert advisor or a recognised distributor of Koppert products for advice on the best strategy for your

• How to protect bumblebees in cold

  impact of climate on pollination and colony quality is also time-sensitive. The longer unfavorable conditions persist, the greater the impact on the bumblebees [...] 15 ºC for optimal plant development. When your crop is healthy and the average 24-hour temperature is at least 15 ºC, you can ensure that there won't be [...] es: Warmth is key Place the hives in the warmest part of the tunnel/greenhouse, ensuring they catch the morning sun. Make sure the hive is in a sheltered

• Rhyzobug

  larvae feed on all stages of armoured scale insects. Visual effect Small scales are consumed entirely. In larger scales feeding damage is visible as irregular [...] beetles directly on the plants. Be aware that adults may not fly away immediately after release. Dosage The dosage of Rhyzobug depends on climate, crop and [...] be repeated until control is achieved. Consult a Koppert advisor or a recognised distributor of Koppert products for advice on the best strategy for your

• Verticillium wilt

  from the top and purple brown stripes occur on the stem. In tomato, sometimes V-shaped lesions are formed on the leaf, between the veins. 'Early dying' [...] the microsclerotia are formed. The spread of the fungus by mycelium growth is limited. Dispersal from plant to plant takes place via water, soil particles [...] seed-borne and tuber-borne. The optimum temperature for Verticillium albo-atrum is 21 °C and growth stops above 30 °C, whereas Verticillium dahliae has an optimum

• Loose smut of wheat

  General Ustilago nuda f.sp. tritici is a basidiomyceteous fungus that affects wheat. It is also known as loose wheat smut, or loose smut of wheat. Damage [...] tritici remains invisible until head emergence. The first sign of infection is the appearance of a smutted ear. Instead of normal tissue, the ear contains [...] only becomes visible after head emergence. The teliospores that are formed on systemically infected seeds then infect neighbouring new seeds. They germinate

• Entonem keeps young orchids free from fungus gnats

  In the interim, the crop is treated with a bacterial preparation. Internal cultivation adviser Jan Mulder explains, ‘It is essential that we do something [...] over the young plants in a fine mist. This is followed by a second fine mist to rinse off nematodes that are on the leaves. A while later, I collect a few [...] Mulder. ‘Our dosages and introductions have therefore always been on the high side. It is better to use a little too much than not enough; infestations must

• Fruit grower uses Natupol Tripol for outdoor pollination

  region of the Netherlands, the 80-hectare orchard grows apples on 45 hectares and pears on 35 hectares. Apple varieties grown include Elstar, Goudreinetten [...] include Conference, Tessa and Migo. ‘Our oldest apple plot is 15 years old and the youngest is one year old,’ Alfred explains. ‘We constantly innovate and [...] Fruit grower Alfred Verstegen works together with his brother and nephews on their fruit company, Verstegen VOF in Opijnen, Gerlderland. Six years ago

• Black tea thrips

  stage which is light yellow with red eyes and short wing pads. The pupal stage is slightly larger, with longer wing pads and larger eyes. It is yellowish [...] Heliothrips haemorrhoidalis , is widely distributed in the tropics and subtropics; it also occurs in greenhouses of temperate areas, is highly polyphagous, and [...] thrips is parthenogenic, it reproduces without mating, and males are rare. The adults are poor fliers and tend to remain in the shaded areas on the plant

• American serpentine leaf miner

  pea, bean and potato. In greenhouses, it is mainly found on gerbera and chrysanthemum. Today the insect is widespread across the whole world. Damage symptoms [...] The American serpentine leaf miner ( Liriomyza trifolii ) is highly polyphagous and thus lives on many host plants such as chrysanthemum, gerbera, gypsophila [...] cause damage to plants both directly and indirectly. The most direct damage is caused by the larvae mining the leaf tissue, leading to desiccation, premature