Dolgo Crabs

[ChadS]

I have some Dolgo Crabs I planted 3 years ago. They seem to be doing great. This year, they have tons of blossoms and I may have some fruit this year.

I put some fertilizer down last week.
Now this week, 6 out of the 10 trees have discoloration on the leaves???
Is this "RUST"?? if so or not is there anything to worry about? Can I spray them?
One more question, I keep getting suckers off of the root stock. Is there something I can do to keep this from happening?

Thanks for any help.

 

[homerj1]

^^^that looks like herbicide drift damage, not rust. Could also be nitrogen burn

 

[Hoytvectrix]

My vote is for salt damage from excessive fertilizer use. Notice how browning is only on the leaf tips? My Dad over-fertilized a few of our apple trees last year and they had they same symptoms. A few of the trees died.

What kind of fertilizer did you use? How much?

If it is salt damage, I would take buckets of water and perform flushes on the soil.

 

[ChadS]

I just put 10/10/10 on them. 10ounces each (1-1/2 Cups)

 

[H20fwler]

How cold did it get in your area last week?

 

[ChadS]

How cold did it get in your area last week?

It was in the 40's all except one morning it got to 30 for and hour or 2.

 

[cavey]

Pray its burn back at the tips from frostbite;

Another question(s) is I see you have weed block down, where did you dump it (was it a dry fertilizer or liquid?)? A cup and a half sounds like a lot to me on a little tree.... they dont really have a drip line and it might be too concentrated around the trunk.

Thats my biggest fear with fertilizing young trees... most of the time they just dont need it - water and weed control is far more important.

Its a wait and see game now... we have all been there. Established Woody plants are pretty hardy and can take some abuse and bounce back.

 

[ChadS]

Damn, that sucks. Yes it was a dry fertilizer, I will get out there ASAP and get what can out of there and give them a shot of water.

 

[wooduck]

We fertilize young trees like your about 2 tablespoons , even then 6 plus inches away from trunk prefer trees to grow into fertility , sure looks like fert burn