Pretiosum
Trichogramma pretiosum
Egg parasitoid of heliothis and other caterpillars
|
 |
|
|
Target Pests
|
Helicoverpa species, loopers, lucerne leaf roller, beet web worm, potato moth...
|
|
|
|
Crops suitable
|
Minimum sprayed vegetables, field crops, heliothis in fruit crops.
|
|
|
Description
|
Tiny wasps which lay their eggs into moth eggs.
The wasp larva develops into a fully formed wasp inside the moth egg.
So, a wasp emerges from a moth egg instead of a caterpillar.
|
|
|
|
|
|
|
Pretiosum male - only half a millimetre long
|
How to use
|
Supplied in sheets of capsules each yielding 1,000+ wasps with 60 capsules per sheet.
Place capsules in a grid fashion through the crops when moths are laying eggs.
|
|
|
|
|
|
|
|
Heliothis caterpillar - a major pest in many crops
|
Release rates
Suppliers
|
Will vary greatly depending on the situation and aim of release - inoculative or inundative.
60 to 180 capsules per hectare depending on pest pressure.
Best to do 2 or more releases a week apart.
|
|
|
|
|
|
|
|
Capsules placed in sweet corn
|
Other biocontrol agents commonly used with Aphidius:
|
|
|
|
|
|
|
|
|
Trichogramma "capsules" are easy to handle
|
Detailed descriptions and instructions for use are provided in
The Good Bug Book - Second Edition Available from good bug suppliers
Or view or download a PDF file of the Book entry for Trichogramma.
|
|
|
|
|
|
|
|
Black parasitised heliothis egg - a wasp will emerge in a day or so.
|
