What make an onion a devout repellant for cockroaches??..what does it contain??..?
Answers: it doesnt, get a lizard let him run around
Onions are most for sure NOT a good repellant for cockroaches...they love both them and potatoes!
This bit from an article at:
www.ipm.uiuc.edu/hyg/insects/german_co...
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"...German Cockroaches - Blattella germanica
The German cockroach is the most common cockroach found contained by homes, apartments, restaurants, supermarkets, hospitals and other buildings where food is stored, prepared or served. They eat food of adjectives kinds and may hitchhike into the home on egg cartons, soft drink carton, sacks of potatoes or onions, used furniture, beer cases, etc."
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Onion is used in home made roach BAIT...to attract roaches to traps...not to repell them.
I doubt that onions will repel cockroaches. Most potential you'll just be providing them a nice snack. borax acid
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