My Valencia Pride, Rosigold, Mahachanok, and Lancetilla are all suffering from some sort of leaf tip "burn" (for lack of an accurate term). All of the burn is on the second flush or older.
All were purchased this past summer as 3 gal trees. They were planted in late August / early September. I have low organic matter, sandy soil that drains well. Soil ph ranges from 6.5 to about 8. Since the summer rains have subsided, I water only when the soil is fairly dry. Well water has a ph of about 6. I've fertilized once so far with excalibur's 8-3-9 w micros. I have also foliar sprayed once with Southern Ag citrus nutritional spray (no NPK).
Is the last pic whitefly evidence?
I have a Dot, 2 Pickerings, Beverly, Ice Cream, and a BKM that don't show any symptoms yet. My avocados and carambola are happy and flushing nonstop.
Any suggestions? Thanks.
Mahachanok
Rosigold
Rosigold
Lancetilla
Lancetilla