Oleander aphids are sucking insects that will damage a mandevilla vine if not controlled. Mandevilla vines are prone to this particular yellow aphid. Spray as needed with the pyrethrin to control.

It’s such a joy to see your houseplants, vegetable garden, flowers—or whatever greenery you have, no matter how small—thrive and bloom. But occasionally, you discover a nasty little surprise: What the ...

In response to readers’ questions since the last Garden Guide, this week’s focus will be bugs, good and bad, and what to do when infestations become too numerous for you comfort zone. One reader asked ...