Ask a Question forum: Silver mulch on top of black mulch?

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May 9, 2016 6:33 AM CST
Hello! I recently planted heirloom tomatoes in large self watering containers using black plastic mulch. I am already seeing signs of white flies and have aphids on a nearby plant (worried they'll travel). I read that silver mulch is great for this. Can I place silver mulch on top of the black mulch? Should I remove black mulch first? Also, should I still use the insecticidal spray? I'd love to avoid the spray if possible! Thank you!
Name: Gene Staver
Portage WI 53901 (Zone 5a)
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May 9, 2016 7:46 AM CST
My favorite spray, if you do use a spray is Azamax. Does not hurt honey bees, kids or pets. Gene
May 11, 2016 1:40 PM CST
Thanks for this! I ordered some and it should be arriving today. Fingers crossed!
Name: Rick Corey
Everett WA 98204 (Zone 8a)
Sunset Zone 5. Koppen Csb. Eco 2f
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May 11, 2016 6:58 PM CST
You ought to be able to blast many aphids off with a fine, hard spray of water. I've read that very few (or none) will climb back up onto the plant.

A friend had an aphid infestation outside (on lupines). He took a few days to think about it, then checked them again.

The aphids were gone, but there were lots of ladybugs, fat from having presumably dined on aphids.

Good luck!

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