I think the guava plants are also showing potassium deficiency. The main symptoms are leaf margin scorching especially older leaves. Potassium deficiency slows the plant growth and causes stunting and stem become weak.
You can apply K2SO4 as foliar spray (2%) at 15 days interval.
Posted
by: Dr. Ravishankar Narayana
(15 points)
Posted: April 25, 2016
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