Hop disease/ nutrient deficiency?

[marms]

So i checked on my hops and noticed that the leaves were turning yellow and brown with white around the edges of some. i didnt see any bugs on the leaves so i was thinking maybe a nutrient deficiency? Something happened to my moms hollyhocks which are near to the hops and they have the same white around the edges but with yellow and brown bumps that the hops dont have (yet at least). Any ideas?

back of leaf

hollyhock front

back of hollyhock

 

[nefarious_1_]

I'm no expert, but the hops looks like heat damage to me. I have no clue what the deal is with the hollyhocks.

 

[theredben]

Not sure on the hops, looks like a nutrient deficiency but I can't say for sure.

That hollyhock has hollyhock rust (Puccinia malvacearum), a regular with those plants. 0% chance it will transfer to the hops.

 

[tchuklobrau]

+1 on the nuts. mine are doing something similar. so im hittin em with fresh application of well rotted manure(nitrogen) wood ashes( phosphorus,calcium, iron, zinc, and molybdenum) and then spraying the leaves with dissolved epsom salts(magnesium). the last being what i really think the problem is.

 

[Hopfarmer]

NPK should help could also be zinc and boron deficient try a foliar spray w a little of all Cheers Glen

 

[jescholler]

I have a similar looking problem (see the image below). This is my 1st year growing hops, so this is probably a common issue. I'm growing 1st year hops in a 20" planter with Miracle Grow. I'm using the stuff that has a time release fertilizer that is good for 6 months. I haven't seen any bugs lately, but I did have some minor aphid problems early in the year. They stunted the growth a good amount, and I suspect they sucked a lot of nutrients from the hops. I live in the Boulder area, so it's hot and dry. It's been in the high 80's to low 90's most days. Would this be a good application for a foliar spray?

 

[B-Hoppy]

I have a similar looking problem (see the image below).

Your problem is most likely a virus as opposed to the first pictures which are just older leaves discoloring. Check out this link and note the circular lesions similar on your photo compared to the ones in the link: http://www.ipmimages.org/browse/detail.cfm?imgnum=5393343

 

[Hopfarmer]

It could be a zinc or boron deficiency the symptoms are very similar to APMV In years past I have had some look like these and a foliar w zinc and boron has corrected the problem

 

[jescholler]

I agree, it looks very similar to APMV, although I read that it is suppressed in warm weather. It's the hottest part of the year, so it seems like good news that it might not be APMV. It just appeared in the past couple of days.

What would you guys recommend I do? If it's APMV, do I still want to keep this plant for future years?

I think it's probably a good idea to try a foliar to possibly rule out APMV. Glen, can you recommend any brands?

 

[B-Hoppy]

The reason I think it's a virus as opposed to nutrient problem is that if you look at the center of the leaf in the picture, it's perfectly clean (no lesions). I'm not a virus specialist but have been dealing with plants for most of my life and have noticed certain things over time and by paying attention you can begin to rule out certain causes. I was told by a hop breeder that virus problems are the least to worry about in that they will flair up from time to time and cause a slight loss of vigor to the plants. My Cascades have been showing the same thing from time to time over the past 20 or so years and I'm still able to dry about two pounds per plant.

You could contact jagdad (he posts here from time to time) and get some virus free plants from him if you're really concerned. I just let mine go on the advice of a professional with over 30 years of breeding experience and things seem to be working out ok. I wouldn't worry about it, but that's just me.

 

[jescholler]

RDWHAHB...good advice to live by