March 4, 1999
Question: When is it a no-no to spray citrus trees? I’ve often heard that using pesticides at this time of year will cause blossoms to fall and reduce yields.
- Nancy, Pine Island
Answer: There’s one rule of thumb regarding pesticide applications of citrus trees while they are in bloom. Generally, applications of copper and oil can be made before the blossoms are fully opened and again after petal fall. Of course, pesticide applications can be made on either side of this period. Read answer to first question. Improper applications of pesticides, while trees are in full bloom, can be phytotoxic..Additional causes of disease or premature fruit drop includes overhead irrigation
- Stephen Brown is a horticulture agent with the Lee County Extension. To submit questions call the horticulture desk at 461- 7504 between 9 a.m. and 4 p.m. or via e-mail at shb@gnv.ifas.ufl.edu. Listen to the ‘Garden Show" at 8 a.m. on 1200-AM
WINK/WNOG.