Deficiencies appear as
chlorosis in the inter-veinal areas of new leaves
producing a banding appearance as seen in figure 18.
This may be accompany reduction of leaf size and a
shortening between internodes. Leaf margins are often
distorted or wrinkled. Branch terminals of fruit will
die back in severe cases.
Also gets locked out due
to high pH. Zn, Fe, and Mn deficiencies often occur
together, and are usually from a high pH. Don't overdo
the micro-nutrients- lower the pH if that's the problem
so the nutrients become available. Foliar feed if the
plant looks real bad. Use chelated zinc. Zinc deficiency
produces "little leaf" in many species, especially woody
ones; the younger leaves are distinctly smaller than
normal. Zinc defeciency may also produce "rosetting";
the stem fails to elongate behind the growing tip, so
that the terminal leaves become tightly bunched.
Excess Zinc is extremely toxic and will cause rapid
death. Excess zinc interferes with iron causing
chlorosis from iron deficiency. Excess will cause
sensitive plants to become chlorotic.