• Crane flies

  General The larvae of crane flies , called leatherjackets, live in the soil and feed on roots and shoots (which they pull into the ground of mainly grasses [...] within one week and then feed on roots and crowns of grasses during the autumn.. Larvae overwinter in the soil, usually in the third instar stage. and start [...] again and feed voraciously when the soil begins to warm up in spring. The larvae pupate below the soil surface in summer. The pupal stage lasts about two weeks

• Rose aphid

  presence in the crop. Wingless females of the rose aphid are 1.7-3.6 mm long and green or deep pink to red-brown. The antennae and sometimes the head is dark [...] dark in colour. The siphunculi are black and bent outwards. The rose aphid usually overwinters on rose bushes in the egg stage, although in mild winter [...] rose aphids retard the growth of buds and new shoots. Foliage and flowers are often disfigured and contaminated with sticky honeydew on which black sooty

• Cryptolaemus montrouzieri

  and feed on mealybug nymphs and adults. Pupal stage: Larvae pupate in various places, on any convenient stalk or on the underside of leaves or on even greenhouse [...] beetle species preys primarily on mealybugs , including species such as the citrus mealybug and the long-tailed mealybug . The predatory beetle Cryptolaemus [...] for mealybug control The predatory beetle Cryptolaemus montrouzieri is a species of beetle belonging to the family Coccinellidae. The beneficial insect is

• Japanese beetle

  symptom of feeding by the adult. The beetles generally feed from the upper surface of leaves, chewing out the tissue between the veins and leaving a lacelike [...] closely folded to the body. It is a pale-cream colour at first, gradually becoming tan and finally taking on the metallic green of the adult. The adult is an [...] 15-20 cm deep in the soil. In early spring, when the soil temperatures increase, the grubs move closer to the surface and resume feeding on plant roots at

• Tree specialist Wolterinck: Control of oak processionary caterpillar with Entonem

  witnessed the effect of Koppert’s nematode product Entonem on the oak processionary caterpillar. ‘We’ve been using nematodes for years. The product is [...] Wolterinck BV in Beltrum, the Netherlands, is a specialist in tree care and weed control and works on behalf of local authorities and governmental bodies [...] is our preferred method over products based on Bacillus thuringiensis , which can only be used on trees with leaves. Nematodes are a better solution for

• Cabbage leafroller

  rest, the wings are held folded almost horizontally over the body. The antennae are thin and of medium length. The moths fly when it is dark. The yellow [...] covered with a gelatinous layer on the upper side of leaves, preferably on major veins or depressions in the epidermis. The caterpillar has a dark green to [...] lighter than the general body colour. In general, the caterpillar has a rather dull appearance. In the fruit of sweet pepper, however, the caterpillars

• Western flower thrips

  causing the surrounding tissue to die. The resulting silver-grey patches on leaves and the black dots of their excreta indicate their presence in the crop [...] buds. Compared to the prepupa, the pupa has longer, more developed wing buds and longer antennae that are curved back over the head. The prepupal and pupal [...] General The western flower thrips (Frankliniella occidentalis) is currently the most damaging thrips species in many greenhouse crops. The western flower

• Chrysoperla carnea

  sheltering under the plant or the rim of the pot, during daylight hours. The larvae grasp their prey from below and lift them in their jaws. The prey is injected [...] populations. The larvae of green lacewings are particularly effective predators. The green lacewing Chrysoperla carnea is used for the control of the following [...] larvae search for prey randomly on the plant. Their efficiency is seriously impaired by the presence of leaf hairs. The larvae are not easily observed and

• Feltiella acarisuga

  Make a hole in the lid and place the cup on the rock wool slab or directly on the soil Protect against direct sunlight and water Leave the cup in place for [...] according to the colour of prey eaten and may sometimes be yellow or red. Immediately after emerging from the egg, the larva is yellowish white. The eggs and [...] red spot appears anterior to the midline, after which the entire larva becomes darker. Finally, white spots appear on the body. A fully grown larva is

• Trianum effectively controls Pythium in cucumber

  sorts of conditions have a bigger impact on the beneficials than on the thrips, which means I need to be alert. The same goes for caterpillars , since there’s [...] 2020. Based on the fungus Trichoderma harzianum T-22, the product colonizes the plant’s root system and keeps pathogenic fungi away from the roots. He puts [...] farm. Hendriks releases Montdorensis every week on half of his crop – the even rows one week, the odd rows the next. He hangs a sheet of insect netting with