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Deal with aphids organically: Method 4
Deal with aphids organically: Method 3
Deal with aphids organically: Method 2
A Pear-Bedstraw Aphid is a sap-sucking insect belonging to the order that holds the True Bugs. Aphids tend to aggregate, forming large colonies on the host plant. To make things worse, they can have several overlapping generations each year so they can become abundant very quickly.
These bugs can cause yellowing in leaves of pear, with heavy infestations causing a check in growth.
Aphids are a food resource for predatory insects like ladybirds and their larvae!
Adults: Aphid adults are pinkish-grey in colour and can be found near areas of new growth. They are tiny insects growing no bigger than 2.5mm. Nymphs: Nymphs appear like adults, but are smaller and lack wings.
Foliage becomes yellow, with leaf tips starting to curl. Heavier infestations can cause a check in growth. Newly formed leaves may be distorted and begin to turn brown in summer. Leaves can become covered with copious amounts of honeydew. This can attract sooty moults to the areas that have been infested.
By encouraging wildlife to visit your garden you can attract many forms of biocontrol to keep pests at bay, free of cost! Insect hotels are an excellent way to do this. Please research insect hotels carefully, as many commercially-bought hotels can be more harmful than good. Earwigs, lacewing and ladybirds are all keen predators of aphids.
You can give plants a plant oil winter wash to eliminate any overwintering eggs. Best time to spray your plants is when insects are nymphs as they are more susceptible to sprays. This is best done in early spring and late winter. Organic pesticides sprayed across several applications can be an effective way to control aphid nymphs. Please consider if chemical control is really necessary. If trees are too large, treating with pesticides is often wasteful and expensive. If a chemical option is sought, check with your local garden centre and please take care to follow the manufacturers' instructions. Check with your local regulating body for guidance on active ingredients and their authorisation for use. Plants that are in flower should never be sprayed due to the danger they pose to pollinators.
This aphid will alternate between currants and Stachys sylvatica (hedge woundwort).