Pine Woolly Aphid - Pineus pini

The apterous female of Pineus pini, known as the 'sistens' is covered in white wax wool. Under the wax the sistens is dark brown to dark red, and almost spherical. The adult Pineus pini aptera has a body length of 1.0 to 1.2 mm. It is associated with Scots Pine where it can cause serious damage.

The needles become twisted, forming a loose gall, with the adelgid nymphs living between the needles.

Gall Insect

Unless identified by a recognised expert, a photo is required and your record should state whether the aphids were recorded on Scots Pine.

On Scots Pine.

Colonies can always be found on the smaller stems and shoots of pine throughout the year with three or more generations per year.

Infestation of Scots Pine by this species causes premature needle shedding and reduction in the length of infested needles. Pineus pini has an overwintering generation on the twigs, and two or more overlapping generations attacking the current year's shoots. Pineus pini eggs are laid in abundant wax-wool. The second of the summer generations in May-June includes winged forms which disperse to other pine trees.

Status in Britain is difficult to determine due to lack of records.

Status in Leicestershire and Rutland not known.

https://influentialpoints.com/Gallery/Pineus_pini_Pine_woolly_aphid_Scots_pine_adelgid.htm