Win a copy of The Ethical Meat Handbook this week in the Food Choices forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education skip experiences global resources the cider press projects digital market permies.com private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • r ranson
  • Nicole Alderman
  • Anne Miller
  • Pearl Sutton
  • James Freyr
  • Jocelyn Campbell
stewards:
  • Joylynn Hardesty
  • paul wheaton
  • Burra Maluca
garden masters:
  • Steve Thorn
  • Greg Martin
gardeners:
  • Jay Angler
  • Carla Burke
  • thomas rubino

How to deal with white flies in a greenhouse?

 
steward
Posts: 6479
Location: Northern WI (zone 4)
1822
hunting trees books food preservation solar woodworking
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I have a modestly large greenhouse that I have some tropical plants and temperate annuals in.  White flies infested my cucumbers so I had to remove the plants.  I was hoping the white fly predators would catch up and take out the little buggers but that didn't seem to happen.  Now they've started moving onto other plants in the greenhouse.  I know organic insecticidal soap will take care of them but I don't want to kill the good bugs as well (if there are any).

The greenhouse was open to the outdoors until recently and it may get opened up again if it warms up next week.  Once it's closed up for the winter, there won't be any new good or bad bugs except for those which have procreated inside.

What good bugs are there to eat these little pests?  What other permie solutions are there?  They've been in here for several months so the ecosystem has had time to adjust and repel them.
 
gardener
Posts: 3048
Location: Central Texas zone 8a
664
cattle chicken bee sheep
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
A nighttime light above a tub of water that contains a fish or 2 should do the work for flying bugs. They go to the light, end up in water, small fish eats them.
 
Mike Haasl
steward
Posts: 6479
Location: Northern WI (zone 4)
1822
hunting trees books food preservation solar woodworking
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Thanks Wayne!  Do you know if white flies, in particular, are attracted to lights?
 
wayne fajkus
gardener
Posts: 3048
Location: Central Texas zone 8a
664
cattle chicken bee sheep
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
It's a good technique for flying bugs but i have no idea about specific species.
 
pollinator
Posts: 527
104
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
There are nematode species that way white fly larvae. I've seen that work wonders in container plants. Should be available at a local garden center or you can order online
 
Mike Haasl
steward
Posts: 6479
Location: Northern WI (zone 4)
1822
hunting trees books food preservation solar woodworking
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Thanks Stephen!  My local places don't have anything like that in stock.  They have insecticidal soap and neem oil and one guy said those products don't take out the beneficials.  I'm not sure if I believe that...

After digging around on-line I bought a flock of Delphastus catalinae beetles.  Apparently they love white fly eggs and will eat aphids and spider mites if they get bored.  They should arrive next week and we'll see if they like it here.  I sure hope so for the price.

The local greenhouse guy struggles with all sorts of bugs since they come in on his inventory.  He also suggested a botanigard fungal spray that would take out the whiteflies.  That probably takes out all the other bugs in the greenhouse.
 
Blood pressure normal? What do I change to get "magnificent"? Maybe this tiny ad?
Got a New Homestead? Here is What You Need to Know to Before You Start a Homestead
https://permies.com/t/97104/Starting-homestead-strong-foundation
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!