How to Get Rid of Black Insects on a Rose Bud

During the spring and early summer, large colonies of aphids often cluster on a rose bush's buds, leaves, stems and new growth. Aphids prefer temperatures of 65 to 80 degrees Fahrenheit. Their population decreases during the height of summer when the temperature soars. The insects appear in shades of black, red, green and yellow. They pierce the cellular surface of the rose and suck its nutrient-filled sap. The pests can cause the rose buds and new growth to wilt, become disfigured and die. While feeding, the aphids secrete a honeydew excrement that readily grows black mold and attracts ants.

Insecticidal soap or neem oil
Ladybugs

Instructions

- 1
  Watch the rose bush's new growth and buds for any signs of an aphid infestation. The small insects usually cluster along the plant's stems and leaves, and a heavy infestation of the pests encompass the buds.
- 2
  Hose the aphids from the rose bush using a strong burst of water from the hose. The water dislodges the pests, washing away the adult insects, nymphs and eggs. Combine water with insecticidal soap or neem oil to effectively kill all the aphids and prevent reinfestation. Follow the application directions on the insecticidal soap or neem oil. Monitor the rose bush carefully for any reinfestations.
- 3
  Purchase ladybugs from a garden center. Ladybugs are a natural predator of aphids. Release the newly purchased ladybugs onto the rose bush in the evening.

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