• Leek moth

  economic value of the plant. Severe damage also occurs on inflorescences of plants cultivated for seed production where serious seed loss can occur. On leeks, [...] moth. The eggs are small, white and elliptical and are laid singly on the leaf of Allium plants. After a wandering period on the leaves, first instar larvae [...] some Asian countries and has been introduced to parts of Canada. The larvae of Acrolepiopsis assectella feed on cultivated Allium species, primarily leek

• Thrips

  feed on all aerial parts of the plant and are fairly mobile. Immediately after hatching, the larvae begin to feed on plant tissue on the underside of the [...] quickly between plants. They are often found on the undersides of leaves, where they feed on plant sap. Damage: Thrips can cause damage to leaves, flowers [...] be a variety of colors, depending on the species. Most of them are brown or black. Some species may have distinctive markings or stripes on their bodies

• Large raspberry aphid

  found on raspberries in Europe. It only feeds on raspberry. Damage symptoms Large raspberry aphids rarely reach populations that are high enough to reduce [...] females continuing to produce new generations of females. Aphids moult four times before reaching adulthood. With each moult they shed white skin, betraying [...] eggs of the large raspberry aphid are laid near the base of vegetative canes and hatch in spring. After emerging in spring, the aphids mainly feed on the

• Glasshouse potato aphid

  the fruit of sweet pepper it secretes a toxic substance, which leads to deformations in the growing tip of the plant. Precisely where the plant is pierced [...] produced) lifecycles. There is no alternation of hosts, and the two types of life cycles occur on the same host plant. The aphid can overwinter not only in g [...] females continuing to produce new generations of females. Aphids moult four times before reaching adulthood. With each moult they shed white skin, betraying

• Chafers

  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 [...] The chafers are beetles of the Scarabaeidae family. The larvae of both species live in the soil and feed on the roots of many plants. They are a serious pest [...] June and July and land on trees to mate. During the night the females move to the ground to lay their eggs. Eggs are shiny and white. The eggs hatch after

• Fit roots for plant health Technical bulletin 2020 EN

  Roots for Plant Health How to facilitate root health and -condition to get the best possible Plant Health Preface This white paper is one of a series [...] contributes to this level of plant health. Level 2: Complete Protein Synthesis To reach this stage of plant health, plants require adequate levels of magnesium [...] contribute to plant resilience. A balanced Ratio Temperature to Radiation will provide the best possible supply of assimilates to the root zone to feed the

• Box tree moth

  larvae of the box tree moth ( Cydalima perspectalis ) feed on the leaves of box trees, but can also attack the bark of the trees, causing them to dry out [...] oligophagous species feeding on the leaves of box tree ( Buxus spp. ) species mainly. Severe defoliation can lead to the death of the tree. As the tree is [...] capsules of different sizes. Life cycle and appearance of Box tree moth The female box tree moth ( Cydalima perspectalis ) deposits clusters of 5 to 20 eggs

• Blueberry aphid

  most likely of North American origin and was probably introduced into Europe with plant material. It feeds on blueberries and is a vector of blueberry scorch [...] symptoms Blueberry aphids live in dense colonies on young shoots of blueberry bushes and produce large amounts of sticky honeydew. The aphids spread blueberry [...] females continuing to produce new generations of females. Aphids moult four times before reaching adulthood. With each moult they shed white skin, betraying

• Oleander scale

  photosynthetic area of the plants, leading to lower yield. Damage to fruit occurs in heavy infestations, where spotting and often deformity of fruits affects [...] infestation can be seen by the appearance of the scale armour on stems, leaves and fruits of hosts. Infestations on the leaves and stems may cause wilting [...] Colonies mainly form on the underside of leaves. After 1 to 2 months, the female reaches adulthood and begins to lay eggs. An adult female may live for several

• Buckthorn-potato aphid

  overwinter as eggs on buckthorn. After emerging in spring, the aphids mainly feed on the underside of leaves of their summer hosts and start to reproduce pa [...] aphid does not cause plant deformation. The major problem in potatoes is the transmission of viruses. Life cycle and appearance of Buckthorn-potato aphid [...] females continuing to produce new generations of females. Aphids moult four times before reaching adulthood. With each moult they shed white skin, betraying