• Geranium aphid

  petioles. In outdoor strawberries they reach their peak in June. Winged aphids are formed from May onwards and are responsible for spreading the infestation [...] white skin, betraying their presence in the crop. Acyrthosiphon malvae rogersii is holocyclic (i.e. they mate in autumn and produce eggs to overwinter) [...] distributed in northern and western Europe. Damage symptoms Wingless aphids may form large colonies on young strawberry foliage, particularly along the petioles

• Natutec biocontrol application devices

  application methods. The right system for you Choosing the right system depends on the specific needs of your operations, particularly the surface area and [...] tailored to meet the unique needs of our customers in different growing environments. Natutec enables growers to: Use biological control products in hard-to-reach [...] As pioneers in biological control, Koppert introduced the world's first natural pest control solution and continues to set new standards in sustainable

• Circular scale

  l parts of the world, mostly in association with the citrus industry. In more northern countries of its range, it occurs in greenhouses. In addition to [...] humid environments. In citrus, it tends to prefer the lower and central parts of mature trees. Circular scale prefers the leaves, but in high infestations [...] under the scale. Eggs hatch under the scale and the crawlers walk about to find a suitable feeding site before settling to a sessile lifestyle. The second-instar

• Cress

  inches) high. The upper part of the plant has many branches. Land cress ( Barbarea verna ), or American cress, is a biennial herb and belongs to the family of [...] its cultivation around the world is growing fast. Garden cress is genetically related to watercress and mustard. Garden cress is in some regions also known [...] of Brassicaceae . This plant originates in southern Europe and western Asia and has been domesticated elsewhere. Cress is a high-nutrient food when eaten

• 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 [...] wholly engaged in seeking females to fertilize. The female second instar nymph, on the other hand, moults into a third instar, and then into the adult female [...] by the trade in ornamental plants. Damage symptoms The cactus mealybug usually infests stems but can occasionally be found on crowns, roots. and flowers

• Hemispherical scale

  General The hemispherical or helmet scale, Saissetia coffeae , occurs widely in tropical regions and in greenhouses throughout the world. It is a severe [...] surface distinguish the species from most other soft scales. The size depends on the host plant and can vary from 2 to 4.5 mm. The young nymphs are white [...] yellowish, more oval in form and with a raised H-pattern on the dorsal surface. All instars live on the underside of leaves, often close to the midrib. Only when

• Barley

  About This cereal grain is grown in temperate regions worldwide. It is one of the four most important cereal corps grown in the world, next to wheat, rice and [...] member of the grass family and a self pollinating crop. Barley is used in brewing beer, a popular source of animal fodder and a component in various health

• Boisduval scale

  1.2-2.2 mm in 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 [...] very similar in their appearance and damage symptoms. Here, the Boisduval scale is described in more detail, as it is the most important one. The Boisduval [...] tends to prefer the leaf midrib and the portion of the petiole that is covered by the sheath. Small infestations on orchids cause extensive discolouration

• Tomato russet mite

  time in Australia and is a pest in tomatoes in all areas where they are grown. Other members of the plant family Solanaceae may be affected to a lesser [...] rusty brown colour, and in serious cases they may snap. The fruit can also be affected, and when this happens in tomatoes, the skin becomes coarse and [...] 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

• American serpentine leaf miner

  exit hole in the leaf with its mouth parts. After roughly one hour the larva crawls out of the leaf and falls to the ground. This occurs in the early morning [...] indirectly. The most direct damage is caused by the larvae mining the leaf tissue, leading to desiccation, premature leaf-fall and cosmetic damage. In tropical [...] can be completely destroyed as a result of the direct damage caused by leaf miners. In gerbera, the larva of the American serpentine leaf miner (Liriomyza