guinea fowl are great, they dont scrach, or touch garden plants. Adult guinea fowls diet consests of about 90% bugs... crickets, grasshoppers, aphids, ticks, etc...
I have some guinea fowl and they do great at eating bugs, I havent had any problems yet.
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If you cant have animals I think 7 dust or other pesticides are your best option.
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A banana plant in the autumn gale -
I listen to the dripping of rain
Into a basin at night.
~ Basho Matsuo (1644- 1694)