• Whitefly

  are usually white or pale yellow in color. This is due to the wax produced by the adults, which is covering their body and wings. Some species have dark markings [...] the growth is obstructed by the stiff hairs. As soon as the red eyes of the adult whitefly are visible in the fourth larval instar, the stage is referred [...] control their population. Whitefly damage The damage caused by whiteflies can be recognized by several visible signs. Here are some of the common signs of

• Roots Growers positive about Mycotal against whitefly

  Whitefly is and remains a pernicious pest for growers of tomatoes and other crops. This is further aggravated by the fact that there are almost no effective [...] company’s headquarters has two sections: one covering 7 hectares (crops without artificial lighting) and another covering 8 hectares (crops under artificial lighting) [...] Zevenhuizen, covers 11 hectares. As organic as possible Roots Growers grows the Piccolo variety, a mini vine cherry tomato. In this segment is plant protection

• Black tea thrips

  stage which is light yellow with red eyes and short wing pads. The pupal stage is slightly larger, with longer wing pads and larger eyes. It is yellowish [...] Heliothrips haemorrhoidalis , is widely distributed in the tropics and subtropics; it also occurs in greenhouses of temperate areas, is highly polyphagous, and [...] banana-shaped and are inserted singly in plant tissue by the females. The early larval stage is whitish with red eyes. Larvae become yellowish after feeding

• Citrus mealybug

  followed by defoliation. The overall effect is a reduction of photosynthesis and therefore the yield. Flowers and fruit often drop off. Plant sap is rich in [...] produce little wax, so that the light yellow to pink body is visible through its waxy covering. There is often a darker longitudinal stripe running over the [...] form; they are soft and covered with a fine waxy material. They move very little. They can be distinguished from other mealy bugs by their possession of 18

• Pear psylla

  Flowers attacked by first generation nymphs turn brown and die. Feeding later in the season may affect the harvest of the next year by weakening or killing [...] General The pear psylla, Cacopsylla pyri , is a widely distributed pest of pear in central Europe and can inflict serious damage in pear orchards. Damage [...] excrete large amounts of honeydew. Sooty moulds often grow on the honeydew covering shoots, leaves and developing fruits with a sticky black layer. Life cycle

• Powdery mildew

  General Powdery mildew is a fungal disease that is caused by many different species of fungi such as Erysiphe, Podosphaera, Oïdium, Leveillula. Damage [...] powdery mildew in greenhouses, it is advised to first ventilate by only opening the windows on the lee side. Please note, this is not relevant for other diseases [...] fungus causing powdery mildew is extremely sensitive to water and ‘hides’ on the underside of the leaves. Therefore, this is where the colonies mostly occur

• Vine mealybug

  Pseudococcidae, and is also known by the names Mediterranean vine mealybug and Grapevine mealybug. As the name indicates, this mealybug is mostly found on [...] followed by defoliation. The overall effect is a reduction of photosynthesis and therefore the yield. Flowers and fruit often drop off. Plant sap is rich in [...] damage. If the population is high, whole bunges of grapes can be colonized. The taste can also be affected. An infection by Planococcus ficus can make

• Boisduval 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 discolouration [...] appearance and damage symptoms. Here, the Boisduval scale is described in more detail, as it is the most important one. The Boisduval scale, Diaspis boisduvalii [...] throughout the tropics, and in greenhouses in more temperate climates. It is very polyphagous and can be a pest of orchids, palms, pineapples, bananas

• Cottony cushion scale

  subtropical countries of the world. It is also periodically discovered in greenhouses in temperate regions, but is not generally a pest in these situations [...] of fruit and forest trees, and ornamental shrubs and trees. Damage is mostly caused by sap depletion; the shoots dry up and die, and defoliation occurs. [...] limbs and an orange-brown body that is coated with white and yellow wax. The adult ‘females’ are easily recognized by their large size (up to 10 mm long)

• Mottled arum aphid

  arum aphid is entirely by parthenogenesis, with unfertilized viviparous females continuously producing new generations of females. There is no sexual stage [...] cosmopolitan distribution and a wide host range. In temperate climates it is primarily a pest in greenhouses where it attacks many ornamentals , including [...] excellent substrate for the growth of black sooty mould. Large areas of mould covering the leaves can reduce photosynthesis and also result in an unattractive