runner beans

[shirley B]

my runner beans have developed a rash of white spots on their two lower leaves (one either side) the rest of the leaves are growing on up the poles and look healthy. i have taken the leaves off of half of them and left the other half in case it's the wrong thing to do, anyone any ideas what it can be?.
thanks for looking  Shirley B

[shirley B]

[tim]

You won't harm the plant.

[shirley B]

thanks Tim will take the rest off.

[BAK]

Quite a number of plot holders on our site have white spots on the leaves - quite a lot of leaves in some cases. Looked at under a magnifying glass eggs are noticeable on the underside of the leaf.

Having a quick look round on the web I wonder if it is spider mite? Found the following .. Any views?

"Two-spotted spider mite (Tetranychus urticae)

Attacks are more pronounced in dry seasons. First signs of infestation are small white patches on the leaf surface, which indicate the position of colonies of young mites on the underside. As the infestation develops, the leaves become more speckled, chlorotic and may turn a bronze colour. Plant growth, pod set and yield can be severely affected. The colonies on the undersides of the leaves produce fine white webbing within which, the mites and eggs can be seen.

Chemical control: There are no approved chemicals for two-spotted spider mite control in Runner Beans."