• Aphelinus abdominalis

  appearance of Aphelinus abdominalis An adult Aphelinus abdominalis is 2.5 to 3 mm in length, with short legs and short antennae. Females have a black thorax and [...] Aphid control with the parasitic wasp Aphelinus abdominalis Aphelinus abdominalis is a parasitic wasp for the biological control of various aphid species [...] s The parasitic wasp is available in a bottle ( Aphilin ). Release mummies near infested plants, because Aphelinus abdominalis is not very mobile Spread

• Early blight

  risk of Alternaria infection is larger under quite warm and humid conditions. Infection may take place within a few hours, with lesions occurring as rapidly [...] General The only known stage in all Alternaria species is the asexual stage. Conidia and mycelium overwinter in the soil and on crop residues and cause [...] to occur on leaves. Those spots then turn into dark brown angular lesions with a yellow halo restricted by leaf veins. Lesions can easily rupture. Other

• Onion thrips

  General The onion thrips (Thrips tabaci) is distributed throughout the world. It is found outdoors on many plants and particularly damaging on onions, [...] are inserted into the plant tissue with a saw-like ovipositor. Larvae are light to yellowish green in colour, with a large head and bright red eyes. The [...] the plant is reduced by loss of chlorophyll. When infestations become serious the leaves themselves can shrivel. Onion thrips (Thrips tabaci) is found mostly

• Pepper weevil

  the best approach is to monitor them during the cooler parts of the day, as this is when they are most active. Another recommendation is to inspect the ground [...] pepper weevil Newly hatched adults have a light brown colour, with an oval body measuring 2 to 3.5 mm in length, and over time they turn grey, reddish-brown [...] wn, or nearly black. Their main distinguishing feature is a ‘snout’ which is longer than their head and prothorax. Two days after hatching and feeding

• Better insights and digital advice with Natutec Scout

  using the Natutec Scout app since October 2019 and is very happy with how it works. ‘Scouting with the app is much faster thanks to the scanner’s digital image [...] you clear analyses. There is intensive remote contact with the Koppert consultant. We see exactly what the level of infestation is and how natural enemies [...] ‘The map of our greenhouses, which is programmed into the app, allows us to see where an infestation is and how it is evolving. It also allows us to see

• Mottled arum aphid

  reaching adulthood. With each moult they shed white skin, betraying their presence in the crop. Reproduction of the mottled arum aphid is entirely by part [...] parthenogenesis, with unfertilized viviparous females continuously producing new generations of females. There is no sexual stage in the life cycle. Wingless [...] cosmopolitan distribution and a wide host range. In temperate climates it is primarily a pest in greenhouses where it attacks many ornamentals , including

• Aphidius colemani

  wings, and is black with dark brown legs. A female has a more pointed abdomen that is as long as the wings, is equipped with an ovipositor, and is black, with [...] behaviour of the female during egg-laying is typical of the Aphidiidae. First the host is examined by drumming with the antennae. This gives the wasp the [...] Aphid control with the parasitic wasp Aphidius colemani Aphidius colemani is a parasitic wasp used for biological pest control . This species belongs to

• Shallot aphid

  cycle, with both winged and wingless forms of adults and a great variety in colour. In greenhouses, reproduction takes place by parthenogenesis, with unfertilized [...] host plant for overwintering and there is no sexual stage in the life cycle. No eggs are produced. Myzus ascalonicus is cold hardy and overwinters in sheltered [...] General The shallot aphid, Myzus ascalonicus , is extremely polyphagous. It feeds on crops such as onions, shallots, strawberries, lettuce, brassicas and

• Codling moth

  moth ( Cydia pomonella ) is a notorious, worldwide pest of apple and also occasionally of pear, quince, peach and other fruits. It is very common in Europe [...] flesh, leaving behind brown frass. The entry point is then greatly enlarged as the tissue beneath is eaten away. Infested fruits usually ripen prematurely [...] forewings, suffused with ash-grey and a large, metallic, bronzy black ocellus on the hind part. The hindwings are brown. The eggs are about 1.3 x 1.0 mm, and

• Chrysoperla carnea

  closely spun cocoon is off-white and egg-shaped, about 3 mm long and 2.5 mm thick. The space between the inner and outer cocoon is filled with fine, loose webbing [...] legs. The larva is colourless and transparent when newly hatched, later becoming cream-coloured to light brown. The head is light grey, with black eyes, and [...] groups when the population density is particularly high. The development of the pupa is visible externally. The outer cocoon is 8 mm long and 4 mm thick. The