Just a week ago, I planted a young letuce in a small pot in my second-floor window. Today, I found these black dots:

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plus three big green worms (not shown). I have no idea how they got into the second floor. Some of the leaves are eaten - probably by the worms. What can I do to save my letuce?

EDIT: it seems what I saw was a cabbage looper.


Limited choices for food crops. The only one I know is BT ( bacillius thurgensis) , which is commonly available . It kills insects and is safe for any mammal and most other animals . It can be used in ponds to kill mosquitos but does not harm fish. Malathion can be used but then you must wait about a month after use ( time used to be a week , but that is politically incorrect now ).

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