• Horse-chestnut leaf miner

  true cocoon in the mine. The percentage of larvae which spin true cocoons increases in each of the subsequent generations. Adults of the first generation [...] up to 3.5 mm in the fourth instar. The pupa is brown and is 2.9-4.5 mm long. The horse-chestnut leaf miner overwinters in the pupal stage in a cocoon in [...] between the upper and lower parenchyma. The mine starts to turn yellow and later brown. By this time, the damage is very visible. Eventually the mines may

• Tomato russet mite

  population growth is most rapid and affected leaves dry out quickly. The damage is first seen on the lower part of the plant and moves upwards as the mites ascend [...] segmented. The body appears to be divided into two parts: the head with the mouthparts, and the rest of the body. All mobile stages have only two pairs of legs [...] ascend. Life cycle and appearance of tomato russet mite All life stages of the tomato russet mite are extremely small and difficult to observe. They are elongated

• Pea leaf miner

  before the harvest is affected. The size of a leaf tunnel depends on the stage of development of the leaf, the species of host plant and the species of leaf [...] appearance of Pea leaf miner The life cycle of a leaf miner has the following stages: egg, three larval instars, a pupal instar and the adult fly. Adult [...] to the ground. This occurs in the early morning. The larva crawls into the ground to pupate. A small percentage of the larvae remain hanging on the leaf

• Tomato leaf miner

  bacteria enter the plant tissue via the feeding spots. Life cycle and appearance of Tomato leaf miner The life cycle of a leaf miner has the following stages: [...] roughly one hour the larva crawls out of the leaf and falls to the ground. This occurs in the early morning. The larva crawls into the ground to pupate [...] 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

• Effective Spider Mite Control on Ornamentals

  April 10, 2019

  population. The sachets are hung within the crop by the means of a strengthened hook, which gives greater durability. The sachets also have an exit hole [...] through which the mites will disperse into the crop. Due to the smart design of the Spical Ulti-Mite sachets, they also serve as a point of discussion when [...] larvae and nymphs) of spider mite. However adult females of the predatory mite feed on all stages of spider mite. Neoseiulus californicus is an essential first

• Cabbage moth

  accumulates in the heart of cabbage, thereby lowering the commercial value of infested crops. Life cycle and appearance of Cabbage moth The adult cabbage [...] from their pupae the female moths lay clusters of 20 to 100 eggs on the underside of leaves or elsewhere within the greenhouse structure. The eggs are initially [...] have a light network of markings. First instar larvae of the cabbage moth (Mamestra brassicae) are gregarious, eating the edge of the leaves on which they

• World Soil Day 2022

  December 2, 2022

  Every year, the Food and Agriculture Organisation of the United Nations holds a ‘World Soil Day’ during which it aims to raise awareness of the importance [...] health. Held on the 5th of December, this year’s theme is: ‘Soils: Where Food Begins’. Throughout the world, soil nutrient loss is a major degradation [...] nutrition. It is recognised as being among the most critical problems at a global level for food security and sustainability around the world. When soils

• Garden chafer

  and fruit crops but reduces the value of ornamental plants. Life cycle and appearance of Garden chafer The life cycle of the garden chafer ( Phyllopertha [...] on roots of grasses and clover. The adults feed on the leaves of trees like oak, hazelnut and birch and on the flowers and developing fruits of, for instance [...] General The garden chafer ( Phyllopertha horticola ) is a beetle from the Scarabaeidae family. It does most of its damage in the larval stage when it feeds

• Sciarid flies

  well-watered are particularly at risk. Life cycle and appearance of Sciarid flies The life cycle of sciarid flies has the following stages: egg, four larval [...] damage is the immediate result of larvae feeding on the roots. The larvae feed mainly on decaying plant material and on algae and fungi present in the soil [...] General Sciarid flies constitute the family of Sciaridae. The species that cause most damage to crops belong to the genera Bradysia and Lycoriella . Lycoriella

• Lyprauta

  vegetative stage. The root damage can also form entry points for pathogens. Life cycle and appearance of Lyprauta The adults of the three species can be [...] distinguished by the wing pattern of adults. Adults of P. trinidadensis have a variation of dark-coloured markings spread over their wings. Adults of L. cambria [...] are small earthworms of the family Enchytraeidae. Damage symptoms The symptoms are superficial damage on roots. Especially the root tips are affected.