By Valrb
United Kingdom 
my Plum tree is covered in a very small grub, the underside of the leaves look powdery and there is a sticky substance on the tops of the leaf which falls to plants underneath , can you advise please?
10 Jul, 2015
Answers
Thankyou, at the moment I have only seen very tiny green bugs crawling up the trunk guess they are the young, did do a winter bark wash last autumn and early spring but has made no difference do you think I should just persevere with this treatment ?
12 Jul, 2015
Any chance of a photograph of the problem insects? Sounds more like heavy aphid infestation...
12 Jul, 2015
Sounds like it might be scale infestation, but without photographs of these 'bugs' its hard to be sure - follow the link below and look at the pic and read the information. You will need to highlight the link and right click on your mouse, or copy and paste the link into your browser
https://www.rhs.org.uk/advice/profile?pid=455
10 Jul, 2015