EN-STRIP

Encarsia formosa

Unit of packaging

Encarsia formosa (parasitic wasp)

Pack size:

10 cardboard strips each with 5 cards wrapped in a box
Contains: parasitized whitefly pupae, from which hatch 3,000 parasitic wasps
for applications where more points of introduction are needed, also cards with half dose are available: >30 wasps from a card

Target

Glasshouse whitefly (Trialeurodes vaporariorum) and tobacco whitefly (Bemisia tabaci) in the third and fourth larval stage. Preference for the glasshouse whitefly.

Rates
EN-STRIP	rate	m²/unit	interval (days)	frequency	remark
preventive	1½-3m²	1000-2000	7-14	-	-
curative light	3-6/m²	500-1000	7	min. 3x	release until control is archieved
curative heavy	9/m²	330	7	min. 3x	release until control is archieved

Introduction

open package carefully inside the greenhouse
bend strips and tear off. Start tearing opposite hang-up hole
suspend the cards in the crop, if possible approximately 75 cm under plant head. Not in direct sunlight
do not touch the pupae

Environmental conditions

The 24 hour average temperature in the greenhouse should be at least 17°C/63°F. At lower temperatures it is recommended to use the cards with half the amount of pupae.

Storage and handling

storage after receipt: maximum 1-2 days
storage temperature: 8-10°C/47-50°F
in the dark

Remarks

the black (empty) pupae remain on the card after hatching
intensive deleafing (in tomatoes) hinders the population build up of whitefly parasites

Appearance

Female adults: size ± 0.6 mm, black head, black thorax, yellow abdomen
Other stages: develop inside host

Mode of action

Female adult parasitic wasp parasitizes the larva of the whitefly. Host feeding also takes place.

Visual effect

After 2-3 weeks, the first parasitized pupae can be seen in the crop. Parasitized pupae of Trialeurodes vaporariorum and Bemisia tabaci turn black and light brown in colour respectively. The adult parasitic wasp emerges from the pupa through a round hole.

Important!

The introduction rates of this product should be adjusted to the mode of action of the product and the results that can be expected in the crop where the product is applied. Your local Koppert consultant or recognized distributor will be able to advise you further.

Only use products that are permitted in your country / state and crop.