• Syrphidend

  start feeding on the aphids . Visual effect Aphids are consumed entirely, only skin remains. Dark excrements (meconium) on the leaves is an indicator of [...] of hoverfly larvae activity. Pack size 50 pupae. Presentation 3.5 x 3.5 x 3.5 cm cardboard box. Carrier Buckwheat hulls and vermiculite. Application Do [...] for advice on the best strategy for your situation. Environmental conditions Syrphidend is most effective between 15 and 23°C. High humidity is favourable

• Apple rosy aphid

  tapered, the cauda is dark, short and triangular. Dysaphis plantaginea lays eggs in autumn in bark crevices on spurs and smaller branches, and on the base of [...] General The rosy apple aphid, Dysaphis plantaginea , is a serious apple pest. It is widespread in Europe and also occurs in Africa, North and South America [...] malformed and ripen prematurely. Feeding of aphids directly on fruits causes reddish blotches on the skin. Life cycle and appearance of Rosy apple aphid Aphids

• Trianum effectively controls Pythium in cucumber

  just ticking over. Those 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 [...] Thripex , in an overkill) keep thrips under control on the farm. Hendriks releases Montdorensis every week on half of his crop – the even rows one week, the [...] 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

• Southern European marshland pyralid

  in groups of 5 to 10 eggs, overlapping in a tile-like fashion on both the upper and lower surface of leaves close to the veins, or low on the stem or stalk [...] decaying organic material on the ground or substrate. They feed on detritus as well as life materials. Young larvae feed on the leaves and flowers before [...] marshland pyralid or European pepper moth (Duponchelia fovealis) is a polyphagous species feeding on a wide range of hosts from 38 plant families. They include

• Mealybugs and scales

  mealybugs and scales is essential to maintain healthy and marketable crops. Biological control of mealybugs and scales relies on natural enemies and monitoring [...] scales feed mostly on leaves and twigs, causing discolouration of foliage, stunting, and in extreme cases eventual defoliation. However, it is mainly the great [...] of the sooty mould that grows on it. Ants are also attracted by the honeydew. In fact, the honeydew with its sooty mould is usually the first sign of the

• 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

• Chafers

  harmful. Damage symptoms Larval feeding on the roots can lead to yellowing and wilting of plants. Damage can be severe on young plants and especially in grassland [...] Scarabaeidae family. The larvae of both species live in the soil and feed on the roots of many plants. They are a serious pest that can cause substantial [...] grassland and turf. There, secondary damage is often caused by birds and small mammals digging for the grubs to eat them. Life cycle and appearance of Chafers

• 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

• Pea leaf miner

  percentage of the larvae remain hanging on the leaf and pupate there, sometimes on the upper surface but more commonly on the underside. The late third instar [...] lettuce grown on open ground. Damage symptoms Leaf miners cause damage to plants both directly and indirectly. The most direct damage is caused by the [...] quantity of foliage can get damaged before the harvest is affected. The size of a leaf tunnel depends on the stage of development of the leaf, the species of

• 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