[redzim]

I have a little bug thing on my hops (Magnum and Santiam) that has been making the leaves go yellow, then brown around the edges. They leave cobwebby stuff on the underside of the leaves, too. Any idea what it is?  You can see from the pix that some are bright green but some are also white, they are about 1/4" long max and look a little like a grasshopper although they don't really seem to jump much. (Sorry the close-up pic is blurry, cell phone has rotten macro capabilities)  They've done a lot of damage to leaves but so far the main bines seem to still be surviving.

thanks,
Red

[theDarkSide]

Just a guess, but maybe these little fellas:

Leafroller caterpillar larva

Many small cream to green colored caterpillars roll and/or tie leaves together where they feed inside. These leafrollers are generally early season pests but can persist through the summer.


http://www.uiweb.uidaho.edu/so-id/entomology/caterpillars.htm

[bluesman]

Looks like they might be Hop aphid, Phorodon humuli.

Here's some links of interest.

http://oregonhops.org/culture2.html

http://www.brewjobs.net/beer/hops-gardening.html