09 Jul 2009 8:42 AM:
We had a similar problem , hundreds every day in the pool. There didn´t seem to be one big nest but the wasps were all over the roof of our house going under the tiles in lots of places. Asked in the local cooperativa....was given a 40g sachet of IMIDAD WP.
Cost 2 euros. This pack is enough for probably 3 sessions so split the powder into 3 lots , mixed one lot with 5 litres of water in my spray pack. Waited until dusk ( less wasp activity ) then sprayed the whole roof . Tried to get into the spaces between tiles but more of a general soaking. Very little wasp activity while spraying. Next day there were still some wasps about but they seemed to be young ones ,( maybe just hatched ) but no where near as many. By day 3 , very few wasps around the pool, perhaps 8 -10 in a day. The powder seems to be a stronger version of the stuff for spraying on fruit trees , which is used every 21 days so I may need to repeat as neccessary but that´s a small price.
Thread:
Help! Major Wasp Problem
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