• Leaf stripe

  graminea is monocyclic, which means there is only one disease cycle during the cropping season. The fungus is seed-borne and this systemic infection is the [...] primary infection. The fungus spreads from the seed into the seedling. Conidia are produced on the infected leaves when humidity is high and wind-dispersed [...] merge. Eventually this leads to the death of the leaf. The leaf splits at the end which makes it look shredded. This is typical for this disease. Infected

• Aphilin

  emerges through a hole at the rear of the mummy. The first mummies are noticed in the crop around 2 weeks after the first introduction. Host feeding also [...] their eggs in aphids . The next generation of parasitic wasps develops inside the aphid, which converts into a leathery mummy. The adult parasitic wasp emerges [...] introduction site for a few days Dosage The dosage of Aphilin depends on climate, crop and aphid density and should always be adjusted to the particular situation

• Tomato russet mite

  laid on the underside of leaves, on leaf petioles, and on stems on the lower portion of plants. When newly laid they are creamy white but turn to a patchy [...] symptoms Damage is caused by the mites sucking out the contents of plant cells. Affected leaves are slightly curled and acquire a silvery sheen on the underside [...] 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. Life cycle and appearance

• Diamond back moth

  regions. Damage symptoms The caterpillar is a surface feeder. They feed from the lower leaf surface, leaving the wax layer on the upper surface intact, thereby [...] one-third of the forewing is ochreous-white, with a nearly white upper edge. In females, the upper two-thirds of the forewings are light ochreous and the markings [...] markings are like those of the males. The back is marked with a broad cream or light brown band along the back, which is sometimes constricted to form one

• Licence permits release of Koppert Swirski Mite® in polytunnels in England

  January 6, 2021

  for the Midlands. “From a technical perspective there is a strong justification for positioning Andersoni® at the beginning and at the end of the season [...] Drive® is a patented system, attached to a custom-made vehicle, which is driven between the table-tops in the strawberry production tunnels. The basic system [...] crop canopy. The application process is controlled from a touch-screen inside the tractor cab, by simply selecting the product name and the rate of application

• European red mite

  attack a large scale of other woody plants and is occasionally a problem on roses and other ornamentals of the family Rosaceae grown in greenhouses. It [...] European red mites on leaves of trees causes initially brown spots on the leaves and when these coalesce the leaves loose colour; this is often referred to [...] generations in one year. The European red mite overwinters in the egg stage; the “winter eggs” are laid in the wooden parts of the host plants in autumn.

• Broad mite

  lay their eggs mainly on the underside of the leaf or on the fruit surface. The elongated, oval eggs are firmly attached to the surface and are rather [...] to the damage caused by viruses. The typical pattern of damage consists of malformation and distortion of the above-ground growth of the plant. The mites [...] show a preference for young, developing plant tissue, like the growing tips, young leaves and flower buds. The mechanism causing the deformation is not

• Hemispherical scale

  4.5 mm. The young nymphs are white to yellowish, more oval in form and with a raised H-pattern on the dorsal surface. All instars live on the underside [...] light yellow flecks. The high, rounded form and smooth surface distinguish the species from most other soft scales. The size depends on the host plant and can [...] General The hemispherical or helmet scale, Saissetia coffeae , occurs widely in tropical regions and in greenhouses throughout the world. It is a severe

• Boisduval scale

  Damage symptoms The first sign of Boisduval scale is the presence of the scales on upper and lower leaf surfaces, fruits, and stems of plants. On palms, Boisduval [...] this scale tends to prefer the leaf midrib and the portion of the petiole that is covered by the sheath. Small infestations on orchids cause extensive d [...] diameter and circular or oval. The cast skins of the nymph form a light yellow spot near the centre of the scale called the exuvium. Adult females can produce

• Cactus mealybug

  their name from the fact that the body of the females from the third nymphal instar onwards are covered with a white waxy material in the form of powder [...] but its origin is not clear. It is now found on many greenhouse-grown succulents around the world as it was probably distributed by the trade in ornamental [...] instar, the males form a pupa. After a complete metamorphosis, a winged male emerges from this pupa. The males lack mouth parts and are incapable of feeding