• Impatiens thrips

  from egg to adult on the plant, specifically on the leaves. Eggs are deposited in the leaf tissue, while subsequent stages are found on the upper- and undersides [...] Pupation occurs on the leaf rather than on the ground. The prepupae and pupae remain immobile on the leaf tissue. Adults are found on both upper- and [...] trade in foliage plants. Impatiens thrips (Echinothrips americanus) has a wide range of hosts. In addition to many ornamental plants it also attacks sweet

• Leek moth

  value of the plant. Severe damage also occurs on inflorescences of plants cultivated for seed production where serious seed loss can occur. On leeks, larvae [...] leaves. On reaching the third instar, the larva penetrates the young leaves, the flower stalk or the inflorescence of the host plant. Feeding on the leaf [...] caterpillars causes a reduction in plant growth; if larvae are numerous, weakening or withering of the plant can occur. On old leaves, open galleries can be

• Leaf stripe

  yield losses. Damage symptoms Symptoms first occur on the first, second and third leaf and subsequently on other leaves. Yellow stripes are formed at the base [...] barley until soil temperature is higher than 12-15 o C Prevent plant diseases by optimizing plant potential and crop resilience. [...] which makes it look shredded. This is typical for this disease. Infected plants may be stunted and heads may be distorted and failing to emerge from the

• Oleander aphid

  principal host plant, oleander. Damage symptoms The colonies of bright yellow aphids can easily be seen on the shoots of the host plants. The damage caused [...] of several important ornamental plants in the families Apocynaceae and Asclepiadaceae. It is commonly found feeding on oleander and milkweeds ( Asclepias [...] mould that grows on the honeydew. Growing tips can be deformed. Repeated heavy infestation throughout the year can lead to stunted plant growth. Life cycle

• Bean seed fly

  near the base of bean plants, and upon hatching, the larvae burrow into the soil and feed on the seeds and roots of young plants. Larvae mainly attack [...] seedlings by feeding on emerged roots and cotyledons. Plants that survive are weak and less tolerant to subsequent attacks by other pests and plant pathogens. This [...] stunted growth compared to healthy plants. Damage to seeds: Darkened or damaged seeds, as bean seed fly larvae feed on seeds and can cause significant damage

• Mealybugs and scales

  persistent pests that feed on plant sap, weakening crops and producing honeydew that leads to sooty mould. Infestations reduce plant vigor, fruit quality and [...] (mealybugs). They suck the sap of plants and are mostly host plant specific. Apart from the damage they cause by sucking plant sap, mealybugs and soft scales [...] Mealybug & scale damage Although most species of mealybugs feed on the aerial parts of the plant, some species extract their nourishment from roots, whilst

• Click beetles

  feed on the roots of many plants. Damage symptoms The click beetles feed on the roots and bore into the base of plants. This can cause the plants to wilt [...] , with the head deeply retracted into the thorax. When disturbed they lie on their back feigning death and then suddenly propel themselves into the air [...] wilt and die. Damage is more severe in young plants. Life cycle and appearance of Click beetles Adult Agriotis sp. are 6-10 mm long and yellowish brown

• Amblydromalus limonicus

  Amblydromalus limonicus lays 3.7 eggs per day on young eggs, 1.2 eggs per day on older eggs and 3.3-3.4 eggs per day on crawlers and nymphs. It consumes about [...] predatory mite feeding on whiteflies, thrips, other small insects and mites. Like other generalist predatory mites , it can also feed on pollen. Amblydromalus [...] Amblydromalus limonicus preys on several other small organisms such as spider mites and tarsonemid mites. They can also feed on pollen and take fluids from

• Cactus mealybug

  be found on crowns, roots. and flowers. Depending on the host plant species, infestations with cactus mealybug cause discoloration of the plants and later [...] It is now found on many greenhouse-grown succulents around the world as it was probably distributed by the trade in ornamental plants. Damage symptoms [...] later necrosis of the tissue. Plant deformations can also occur. Heavily infested plants stop growing and will eventually die. Life cycle and appearance of

• Trianum effectively controls Pythium in cucumber

  roots. He puts two grams of Trianium-G on each mat before putting out the new plants in ‘duo’ pots (two plants in one rockwool cube). He decided to do [...] 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