Dragonfli Whitefly Killer - Encarsia formosa Parasitic Wasp Cards - Natural Biological Control (5 Cards)

All very simple to use and seems to have done the job.

This year the eggs never hatched - I hung them the day I had them, white fly were present and the temperatures were correct in the greenhouse .I normally have great success with these Encarsia control methodsI wondered whether I had a duff batchI contacted the supplier but got no response so I suggest you use other suppliers of this product in future .I understand others have had the same problem this year

Have used these for four years in the polytunnel and they work well. You must get enough to suit the size of your tunnel or greenhouse and the degree of infestation. We have a 3x6m tunnel, growing tomatoes, chillies and peppers, and buy 10 cards at the first sign of a whitefly problem. The first year, the infestation was quite bad before we spotted it and we put 20 cards up. For a week there was no noticeable difference and I wondered if they had even hatched, but a look through a magnifying glass showed the pupa cases burst open. within another week the flying whitefly were greatly reduced and after another week were all but gone. Any whitefly still remaining on the leaves were dead. Remember the wasps can take a week or so to hatch, and FOLLOW THE INSTRUCTIONS on the pack. 2 applications in a season have controlled the problem for the last 3 years, but stay on top of it!

For the second time did everything as instructed and nothing happened!

Instruction said remove all stick papers before attaching the nematodes. I was a bit worried doing that because I had a feeling things would get worse before the wasps hatched and how right I was. By the time they hatched the snowstorm was huge. White fly infestation had multiplied 10 fold even more maybe. The wasps couldn't cope. I now have the horrid job of scrubbing down the entire greenhouse. Shalln't use them again.

Sadly didn’t work for my tomatoes which were infested with whitefly ..

They are still in greenhouse but have never hatched. So they are bad