Broad mite

resembles the adult, but is slightly smaller and has only three pairs of legs. The emerging adult mite is roughly 0.2 mm long, oval and broad, and pale [...] feeding is mainly concentrated on the underside near the leaf stalk, which tends to cause the leaf to turn brown and curl up. A typical indication of an attack [...] tips, young leaves and flower buds. The mechanism causing the deformation is not yet fully understood, possibly the mites, whilst sucking out the contents

Phytoseiulus persimilis

with ease. This has the advantage that an outbreak is quickly and effectively dealt with, but the disadvantage is that it disappears rapidly in the absence [...] optimal temperature for controlling spider mite is between 15 and 25°C. At about 20°C with good prey supply, an adult female consumes up to five adult spider [...] the spider mite population by predation. Phytoseiulus persimilis is highly specific and is only effective against spider mites that produce a large amount

Trianum effectively controls Pythium in cucumber

vigour and is suited to exposure levels above 180 micromol. But the variety has a slightly weaker root base than other varieties. ‘This is another reason [...] Phythium at a very acceptable level. Treatment with Trianum is easy, requires very little labour, and is reasonably priced.’ [...] Cucumber grower Kees Hendriks (Qcumber) explains how his plant protection strategy has moved from integrated to ‘almost’ biological, using fewer and fewer

Mealybugs and scales

are concerned, these often drop off; plant sap is low in proteins and rich in sugars. In order to gain an adequate intake of protein, mealybugs must ingest [...] and fruit production; in ornamental crops, the mere presence of mealybugs is sufficient to render the product unfit for sale. A very small population can [...] foliage, stunting, and in extreme cases eventual defoliation. However, it is mainly the great quantity of honey-dew that causes the damage because of the

Green peach aphid

peach tree, is native, however it is now a pest with a world-wide distribution. The green peach aphid ( Myzus persicae subsp. persicae ) is a particularly [...] General The green peach aphid ( Myzus persicae subsp. persicae ) is an important insect pest in sweet pepper, tomato, cucumber and many other greenhouse [...] persicae subsp. persicae ) is the most important vector of viral diseases. It can transmit at least 100 different viruses and is thus rightfully feared by

Greenhouse whitefly

and the excess is excreted as honeydew, with larger larvae expelling large quantities. The damage that whiteflies cause to a crop is the result of sucking [...] es: If the population is very large, feeding on plant sap can affect the physiology of the plant, as a result of which growth is retarded. In full sunlight [...] although strictly spoken this is not true) and adult. The larvae are found on the underside of young leaves and have an oval shape. The first instar larvae

Amblydromalus limonicus

Amblydromalus limonicus is most effective at temperatures between 13 and 25 °C (55 and 77 °F). It is not effective above 30 °C (86 °F) and is sensitive to relative [...] us limonicus is not recommended as it is hindered by the glandular hairs on the stems and leaves and does not build up a population. How to use Amblydromalus [...] Amblydromalus limonicus is a species of predatory mite known for its role in biological pest control . Amblydromalus limonicus is a natural enemy of various