Most plants have some negative aspects. Mandevillas are aphid magnets. If you want to grow them, it's just something you'll have to put up with. Once the plant gets big and vigorous enough, lacewings and ladybugs should be able to keep them from exploding into plague-level populations. If your climate is marginal for growing mandevillas, it could prove to be a losing battle.

I keep a tub of killer soap water handy to drop critters into.. It is a mass grave for stinkbugs, harlequins, and leaf footed guys. The leaf footed guys are quick when they are old. I have a mature couple that are eluding me. So I expect to see a bunch of babies soon. stink bugs are easy to grab so are harlequins. Try some soapy water with dawn original soap on the babies. I hear that the parents are susceptible but the babies are more vulnerable. It is worth a try. My hand held vacuum cleaner was worthless for me. True, I got it from Goodwill. The dawn soap spray mixture works almost IMMEDIATELY on coried bugs ( a relative to the stinkbugs) by getting into their breathing apparatus. They take about 15 seconds and then start twitching. The net bags are good for the toms but these bugs also suck the plants and leave a poison that causes decline of the plant if it gets too much.

Your plant had the eggs of a type of assassin bug on it. I'd consider these quite beneficial in the garden setting but NOT inside. Get rid of them while they're still tiny. They stab painfully when older and bigger.

Well on friday I sprayed all the trees in the greenhouse with neem oil - literally doused them all over - and this morning i noticed one of the mites moving around on the top of one of the trees again! After a quick inspection of all ten trees that was the only one that caught my eye. Should i spray again right away, or give it a few days before spraying again? Also, should i only re-spray the tree where the mites are visible or spray all of them again? Any advice from those with experience would be super helpful. Thanks