• Spidex Vital lives up to its promises

  have been released and they get right down to doing their job.’ A tense moment Sjaak van Dijk switched over to Spidex Vital at the start of February. ‘I [...] weeks later. ‘As the old crop is always cleared away, I start from scratch each time and have to build up the necessary populations three times. This is always [...] Sjaak received from consultant Ron Delissen and with what Koppert promised in the leaflet, he tells us. ‘Spidex Vital immediately gets to work on tackling

• Crane flies

  have 4 instars (larval stages) an reach 2.5 cm in length when fully grown. Pupae are greyish-brown, and 2.5 cm long. After adults emerge, part of the pupal [...] out above the soil surface. Adult common crane flies emerge from the soil in late summer to fall, and females mate and lay 200-300 eggs. Larvae emerge within [...] the burrows of the larvae might also be visible. Secondary damage may come from birds and rodents feeding on larvae and digging up turf. Life cycle and

• Black tea thrips

  greenhouses of temperate areas, is highly polyphagous, and has been recorded from more than 100 plant species. Seriously damaged crops include tea, citrus [...] surface first and, as feeding progresses and the population increases, moves to the upper surface. The leaves become discoloured and become distorted between [...] drop. In addition, leaves are covered with small droplets of black excrement from the thrips. Life cycle and appearance of Black tea thrips Adult black tea

• Feltiella acarisuga

  Immediately after emerging from the eggs, the midge larvae start to feed on spider mite eggs, nymphs and adults. They use their mouthparts to first immobilise their [...] adjusted to the situation. Start introduction as soon as the first spider mites are detected in the crop. Introduction rates typically range from 0.25-25 [...] consume 15 adult spider mites or up to 50 mite eggs per day. They are aggressive and adapt the amount of food they consume to the density of the spider mite

• Grower Koen - Embracing biological crop protection in agriculture

  approach stemmed from both practical considerations and a conscious choice. Inheriting the farm from his parents, Koen had the opportunity to continue the [...] too quick to completely abandon traditional methods. He decided to find a balance between both approaches. This way of working allows him to gain experience [...] protection . As a result, he acquires a lot of knowledge and is prepared to fully transition to biological crop protection when the government decides that certain

• Two-spotted spider mite

  about 0.5 mm long. They have an oval body that is rounded at the rear end. Their colour can vary from orange, light yellow or light green, to dark green [...] narrower and more pointed at the rear. Colour is very variable: from light yellow or orange to dark yellow or brown.The colour of the adults often depends [...] are tiny, adults are about 0.5 mm long in length. They have an oval-shaped body with eight legs, which distinguishes them from insects that have six legs

• Rose

  but are often ornate and bright coloured. Colours range from white to yellow, pink and orange to red, the most popular colour. [...] About The rose ( Rosa) belongs to the genus Rosa of the family Rosaceae. Rose also refers to the flowers the plant bears. There are more than one hundred

• Anagyrus vladimiri

  all items How to use Anagyrus vladimiri The parasitic wasp Anagyrus vladimir is available in a bottle ( Citripar ). Remove the label from the bottle according [...] first signs of infestation appear. Introduction rates typically range from 0.1-0.5 per m 2 /release. Releases should be repeated at least 3 times at an [...] consuming it from within. This internal feeding ensures the larval wasps have a constant and protected food source, eventually leading to the death of

• Black root rot of cucurbits

  exudations of spores. In the early stages of wilting it is hard to distinguish from other wilt diseases. The fungus can also cause black fruit rot. Life [...] The lesions may grow and encircle the root. The roots become yellow-brown to black and ultimately die. Black lesions with fruiting bodies occur more commonly [...] coloured tissue that looks like black stripes. The disease is usually restricted to a few of the roots but in severe cases all roots may be infected. At the final

• Dwarf bunt

  does occur, but is less important from an epidemiological point of view. The teliospores germinate in response to moisture and form basidiospores, also [...] teliospores. These balls break during harvest allowing the teliospores to fall to the ground. Additionally, these teliospores contaminate healthy kernels [...] germination is 3-8 °C and it takes three to ten weeks for germination. The seedlings are infected after emergence; the two- to three-leaf stage plants are most