adult insects are 1 to 5 mm long, grey-black flies with long antennae. They have relatively long legs, and the wings show very clear venation. The fly has [...] 5 to 12 mm in length and 0.5 to 1.5 mm in diameter. They are legless and have a conspicuous black head. The head is equipped with biting-chewing mouth
grower’s IPM biocontrol system,’ Dr Groot adds. ‘The sachets have been a huge success, and we have managed to prolong the duration of their efficacy. It’s all [...] shares that he is passionate about nature and especially predatory mites . ‘I have been crazy about biology and living creatures all my life. As a child I would [...] happened on my path when I studied biology at the University of Amsterdam. They have fascinated me ever since and led me to my present position at Koppert.’
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preventive policy. ‘We have set a very high standard,’ say Van de Wel, Veldhuijs, and Mulder. ‘Our dosages and introductions have therefore always been [...] examines the action of the nematodes under a microscope. First when they have just come out of the packaging and later after spraying. Dennis van der Wel
Phytoseiulus persimilis . Over the years, we have further specialized in producing a big range of natural enemies and have several patents to our name. Our stability [...] and colder temperatures and can handle high humidity. The predatory mites have a somewhat higher sensitivity to chemical pesticides. Transeius montdorensis
General Houseflies are a well-known pest of farm and home. Believed to have originated in central Asia, the insect expanded its range worldwide long ago [...] or over three weeks later at low temperatures (around 15°C). Adult flies have an average life span of 15–25 days, but can live up to two months in the
yellow markings. Adults that have overwintered are typically darker than summer adults. Regardless of colour, all lygus bugs have a light-coloured “V” shape
emerge to begin feeding on corn roots. Certain populations of this species have evolved a resistance to crop rotation through prolonged diapause; the eggs [...] insects are at a disadvantage under continuous corn cultivation because they have effectively half the reproductive rate of their univoltine counterparts.
Damaged strawberry leaves are wrinkled and irregularly folded. Affected plants have an unnaturally dense appearance because the petioles remain short. Severely [...] are wide. Both ends are equally rounded. The larvae are opaque white and have only three pairs of legs. They develop into the resting stage (pharate nymph)
main colours are white, yellow, orange, red and pink, but one flower can have petals in varying colours. In addition, the gerbera is also used as a model
