Aphids are tiny (adults are under ¼-inch), and often nearly invisible to the naked eye. Asked June 11, 2020, 7:58 PM EDT. Fungi, bugs, blight and malnourisnment can all cause your plants to produce fewer or smaller blooms or even die. If you do have problems with aphids on petunias, treat them swiftly to avoid further problems. Perhaps the easiest home remedy for aphids on petunias outside is to spray the undersides of the leaves with a strong stream from your garden hose. Petunias rarely suffer pest problems, but there are several small, white insects, such as aphids, thrips and whiteflies, that can sometimes be bothersome. ETXGardener. How to Kill Aphids on Petunias with the Garden Hose. Use natural control methods to get rid of aphids on petunias and your petunias will continue to thrive and bloom in your landscaping areas. Shake the bottle to combine thoroughly. Something has been eating the blooms on my petunias. Answer. Usually, the petunias thrive. I have tried several varieties, including regular old petunias and the 'Wave' varieties. Saved by eHow. 0 0. The blooms are covered in them. on Sep 23, 2017. could be sun burn, or insects. Good luck with your petunias! 2. If the white spots are not little white bugs your plants may have to much or to little fertilizer. Aphids. What to do? I'd guess you have aphids. This has been going on for a couple of weeks now, but this is the first time I have observed the actual insect. on Sep 23, 2017. 3 answers Dfm. Like leafhoppers, plant bugs inject a toxin into your plants’ leaves, buds, and shoots as they feed. Aphids are tiny insects that eat the leaves and blooms of a plant. I have a small "porch garden" of mostly petunias on my condo balcony. Test the oil spray on a small, inconspicuous section of the petunia and check that spot for injury for 48 hours before treating the entire petunia. I could not really SEE bug features, they look like tiny 'hairs', but I know it is "something alive." Petunias may be hardy plants, but they are vulnerable to a few destructive pests and diseases. While Calibrachoa million bells may be a fairly new species, this dazzling little plant is a must-have in the garden. The petunias in my hanging baskets have tiny white spots on them. Blast them off your plants with a hard stream of water or spray … Ensure the spray of water hits both the bugs and the affected area, then rinse the plant with water. Its name comes from the fact that it features hundreds of small, bell-like flowers that resemble miniature petunias.Its trailing habit makes it perfect for use in hanging baskets, containers or as a small area ground cover. thanks! Insects on Petunias. Various species can appear white, black, brown, gray, yellow, light green, or even pink! They could be mealy bugs or aphids. They just got COVERED with tiny white hair like bugs on the back of the leaves, and are showing signs of weakness. 1 decade ago. I discovered the insects (tiny specks on the white bloom) in the photo this evening. The most common plant bugs of interest to gardeners are cinch bugs, harlequin bugs, and squash bugs. Monica Camilli. Helpful. No matter what I do, they end up with little black and white bugs and eventually die. "Plant bugs" is a term that includes a number of true bugs, members of the Hemiptera order of insects. Both very contagious, so keep from other plants . If possible, spray the petunias early in the day so the moisture on the leaves evaporates quickly, minimizing the potential for fungal disease problems. Some may have a waxy or woolly coating. Reply. Firstly, check if the soil & roots are contaminated too. Petunia Plant Herbaceous Perennials Hanging Plants Plants Seeds Petunia Diseases Flowers Annual Flowers Germination. Tiny White Bugs on My Petunias | Hunker. Petunias are not prone to disease or insect infestation in the same way as other annual flowers and vegetables. 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