Re: [apple-crop] Reverse Autumn?

2011-05-18 Thread Mosbah Kushad
In addition to leaf analysis, I suggest you send soil samples as well. Phosphorus binds to calcium and magnesium at high soil pH and to iron and aluminum at low soil pH, tying up the phosphorus. Also, course soils (sandy soils) have less phosphorus than fine soils. Mosbah , University of Illinois

Re: [apple-crop] Reverse Autumn?

2011-05-18 Thread Rye
Bill, yes it has been unusually cool and I have noticed this tendency seems to coincide with colder weather. We had a hot spell, to which I relate the red leaves in the first episode turning green upon reaching full size, between these two cold spells. Also, this redding tendency seems to

Re: [apple-crop] Reverse Autumn?

2011-05-18 Thread William H Shoemaker
Often phosphorus deficiencies are induced by cold temperatures, which leads to leaf color changes. There is interaction between genetics and environment that leads to variable expression of these induced deficiencies. Rye, has your season been cooler than normal in So Cal? Once warmer temperatures

Re: [apple-crop] Reverse Autumn?

2011-05-18 Thread Ron Becker
Phosphorous deficiency will give leaves a reddish color on many types of plants. Sending a leaf sample to a lab for foliar analysis would be a way to confirm this. Ron Becker Program Coordinator, Ag & IPM OSU Extension, Wayne County Website-www.wayne.osu.edu Ohiol

[apple-crop] Reverse Autumn?

2011-05-18 Thread Rye
I know that subject is probably making you go "Huh?" I know that because that is what I'm thinking "Huh?" Some of my trees have new leaves growing out red like Autumn but gaining is size. And, new (red) leaves are still growing out after them and extending the shoot. Earlier leaves just belo