When the days get hot, using any type of
spray oil for insect control can be a
real problem for many nursery growers,
commercial applicators and homeowners.
Horticultural spray oils can all burn
plants when the temperatures get hot.
Mixing any of these oils with fertilizer
is almost a sure burn for plant
foliage. Fortunately PLP has
an excellent plant safety record.
Commercial pest control companies that
are “going green” and who offer all
natural services for their lawn and
landscape spray programs, appreciate
this type of product.
The following photos were taken on a
wide variety of plant material. Oil
sensitive plants like Orchids, Hibiscus,
Bougainvillea, and Plumbago that were in
bloom, to include Staghorn ferns,
Gardenias, and tropical fruit trees
such as Citrus, Guava, Mango, and Banana
were all treated with PLP. All of these
plants were sprayed with a tank mix of
PLP, a slow release liquid
nitrogen, manganese, magnesium,
potassium, iron and a spreader sticker.
The outside spray temperature at the
time of this application was 87°
F (field test temperatures have been as
high as 93°
F with the same results.) The date of
application is Oct. 8, 2009; the site is
in the Florida Keys. The heat index
over the next 4 days was between 104°
Normally plants would show signs of
burning in 3 days. With spray sensitive
plants, the flowers always burn before
the leaves do. The following photos were
taken at 6PM on day four. There was no