I pick the pests and execute them. (...no, it is not the most enjoyable part of my gardening experience...). Or wash them down with water hose (aphids).
This year was not bad for me - I hardly even had aphids! The cold weather is probably to blame.
Or maybe the birds, lizards or snakes that live in my garden.
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...but these 'banana' slugs do drive me crazy this year. Yuck...
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The truth is I never used any pesticides, even before I moved to 100% organic gardening.