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Scouting
& Monitoring |
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Use yellow Bug-Scan®
sticky traps for (timely) detection of flying insects. During
the heating of the greenhouse hang min. 20 yellow sticky traps per
ha to detect the first flying insects. |
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Also use yellow Bug-Scan®
sticky traps during the cultivation. Count and register during
minimum the first 10 weeks of your cultivation the different species
of flying insects which are captured on the sticky traps. |
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Contact
with beneficials |
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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. |
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Introduce beneficials preferably early
in the morning. |
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If you want to store the beneficials for
a short time, you have to reckon with the storage temperature and
the use by date which are mentioned on the packing. |
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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. |
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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. |
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Biological
control of whitefly |
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Encarsia-System
(parasitic wasp - Encarsia formosa) |
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Available as sprinkling material
or on cards with 50 or 100 Encarsia
formosa/card. |
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Curative: Introduce weekly 2-3
Encarsia formosa/m²
until a sufficient number of whiteflies are parasitized (80%). |
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In hot spots: Introduce 5-10 Encarsia
formosa/m²/week. |
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Remark:
- As from the moment that whitefly is detected, introduce
more Encarsia.
- If necessary, introduce longer.
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Biological control of
spider mites |
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Phytoseiulus-System
(predatory mite - Phytoseiulus persimilis) |
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Introduce minimum 6 Phytoseiulus/m²
as soon as the first spider mites are detected. |
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The dose depends on the severeness
of the spider mite damage. |
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In and around hot spots: Introduce
minimum 20 Phytoseiulus/m². |
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Biological
control of thrips |
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First: after planting: a chemical product
with a short resistance is applied in the crop. |
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During sprayings with an "inhibitor"
a broad-working insecticide is applied. |
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Discuss the possibilities and products
with your advisor. |
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Hypoaspis-System
(predatory mite- Hypoaspis spp.) |
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Before or just after the plantation
disperse 100-250 Hypoaspis/m². |
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Do not introduce immediately after
the disinfection or steaming (not enough nourishment). |
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Orius-System
(predatory bug - Orius spp.) |
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Introduce Orius
majusculus preventive on a weekly base, 1 week after
the treatment with a chemical product. |
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Introduce minimum 2.000 predatory
bugs/ha. |
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Biological
control of aphids |
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Aphidoletes-System
(gall midge - Aphidoletes aphidimyza) |
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Preventive: Introduce 0,1 Aphidoletes/m². |
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Curative: Introduce 1 Aphidoletes/m²/week. |
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Disperse Aphidoletes
on a moist substratum or in buckets. |
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Remark: The gall midges have an
excellent ability to search, but they can become disorientated
by frequent use of a sulphur steamer. |
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Ervi-M-System
(parasitic wasps - Aphidius ervi) |
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Introduce Aphidius
ervi if Potato aphid or Glasshouse potato aphid are
occurring. |
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Introduce 2 Aphidius
ervi/m² in and around hot spots. |
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Introduce the parasitic wasps at
the bottom of the plants, preferably in the neighbourhood of
aphid hot spots. |
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Aphidius-System
(predatory wasp - Aphidius colemani) |
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Preventive: Introduce 0,1 Aphidius
colemani/m² weekly. |
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Curative: Introduce 0,5 Aphidius
colemani/m²/week during 3 weeks and until a sufficient
number is parasitized. |
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Do not throw away heavy infested
flowers, because Aphidius
can multiply on them. |
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Aphidius-Mix-System
(predatory wasp - Aphidius colemani & Aphidius ervi) |
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Banker-System
(open rearing system for the control of aphids) |
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Weekly 3 Banker-Systems
until 1 system per 750 m² is present. |
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Introduce the Banker-Systems
in boxes, so that these boxes can be moved later on.
(e.g. when the crop has been sprayed) |
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Biological
control of leafminer |
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Dacnusa-Mix-System
(parasitic wasps - 90% Dacnusa sibirica and 10% Diglyphus isaea)
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Introduce preventive on a weekly
base 2-4 tubes Dacnusa-Mix-System/ha. |
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Remark: Samples of the leaf should
be tested regularly to determine the percentage of parasitized
leafminers. To have a sufficient control, the percentage must
be 80-90%. |
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Diglyphus-System
(parasitic wasps - Diglyphus isaea) |
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Introduce 0,5-1 Diglyphus
isaea/m². |
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Remark: Samples of the leaf should
be tested regularly to determine the percentage of parasitized
leafminers. To have a sufficient control, the percentage must
be 80-90%. |
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Crops