For small plantings, you can try hosing the aphids off plants ever so often. Insecticidal soap can also help. Diatomaceous earth (food-grade, not pool grade) also is an option: for more information about this method, check this page: /blog/gardening/garden-journal/what-diatomaceous-earth You can also encourage beneficial insects by planting nectar-rich plants nearby, such as alyssum. As to how to dispose of aphid-infested plant debris, you can toss it in the trash, or bury it deep in a compost pile. Aphids overwinter as eggs, often laid on trees or shrubs.
For small plantings, you can try hosing the aphids off plants ever so often. Insecticidal soap can also help. Diatomaceous earth (food-grade, not pool grade) also is an option: for more information about this method, check this page: /blog/gardening/garden-journal/what-diatomaceous-earth You can also encourage beneficial insects by planting nectar-rich plants nearby, such as alyssum. As to how to dispose of aphid-infested plant debris, you can toss it in the trash, or bury it deep in a compost pile. Aphids overwinter as eggs, often laid on trees or shrubs.