STOCK WATCH

FOUNDED in 2004, Tyratech uses natural products to battle harmful insects.

The AIM-listed business aims to defeat mosquito-borne diseases and tackle crop-destroying pests with beefedup versions of the defences deployed by plants rather than pesticides.

It yesterday secured shareholder backing to sell an anti-head louse treatment to Alliance Pharma for up to £13m.

This includes £9.7m up front and more if targets are hit. Shares were flat at 2.5p.