Crops
Poinsettia
General remarks on the biological control in poinsettia
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  • Before introducing beneficials, the greenhouse and plants should be free of harmful pesticide residues.
  • Before the beginning of your cultivation discuss with your advisor a plan of approach for the whole season.
Scouting & Monitoring
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  • Use yellow Bug-Scan® sticky traps for (timely) detection of flying insects. Hang during the heating of the greenhouse min. 20 yellow sticky traps per ha to detect the first flying insects.
  • Also use yellow Bug-Scan® sticky traps during the cultivation. Count and register during minimum the first 10 weeks of your cultivation the different kinds of flying insects which are captured on the sticky traps.
Contact with benficials and bumblebees
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  • Follow up carefully the user’s instructions; always pay attention to the icons on the packing. If necessary consult the Icon Guide.
  • Introduce beneficials and bumblebees preferably early in the morning.
  • If you want to store the beneficials for a short time, you have to reckon with the mentioned storage temperature and the use by date which are mentioned on the packing.
Chemical corrections
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  • If a chemical correction has been inevitable, use as much as possible selective chemical crop protection products. Try to apply chemical corrections on local spots.
  • In case of doubt about the side effects of pesticides, contact your advisor or consult the Side Effects Manual which is available on www.biobest.be.
Control of: Greenhouse whitefly
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The greenhouse whitefly (Trialeurodes vaporariorum) is a typical greenhouse pest that affects many crops.

  • Available as sprinkling material or on cards.
  • Introduce 6 Encarsia/m²/week
  • In case of parasitization: increase up to 9 Encarsia/m²/week.
  • Introduce during minimum 4 weeks min. 3/m² until a sufficient number of whiteflies are parasitized (80-90%).
  • When Bemisia tabaci (tobacco whitefly) has been detected, introduce during 5 weeks 3 Eretmocerus mundus/m².
Control of: Sciarid fly
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Sciarid flies are small, black insects (3-5 mm) with slender antennae and long legs. Especially the larvae cause a lot of damage.

  • For the production of cutting material, it is advised to treat the mother plants not only with Steinernema-System, but also with Hypoaspis.
  • Dose: minimum 250 Hypoaspis/m².

Apply 10 days after cuting or potting 500.000 nematodes/m². Repeat after 4-5 weeks if necessary.

Control of: Thrips
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Adult thrips are small, elongated insects with typical fringed wings. They measure about 1 mm, and have a greyish or yellow to brown colour. The two most common harmful species are the onion thrips (Thrips tabaci) and the western flower thrips (Frankliniella occidentalis).

  • The sensitivity to thrips depends on the species.
  • Hang yellow and blue sticky traps to detect the thrips.
  • If thrips larvae are detected on the crop, introduce at least 100 Amblyseius cucumeris/m². It is important to repeat this a few times.
  • Warning:
    Amblyseius-Breeding-System (ABS), which contains the predatory mite Amblyseius cucumeris delivered in breeding sachets, also contains Mold mites (Tyrophagus putrescentiae) and bran. Under certain circumstances such as a moist greenhouse climate or when using large quantities of breeding sachets, Mold mite population can increase to the point of causing damages in some crops (e.g. cucumbers). When planning to use these products in crops where they have never been used before, we recommend to first perform a small-scale trial or to discuss this with your Biobest advisor or supplier.
Crops
Contact Biobest
Biobest Belgium N.V.
Ilse Velden 18
2260 Westerlo
BE - Belgium
T: +32 14 257 980
F: +32 14 257 982