I read about an new (to me) product called Bayer Rose and Flower Insect
Killer that has Imocloprid and something called Clyfluthrin (sorry if I
spelled that wrong). Label says its a systemic and kills on contact.
Those seem to be counter intuitive to me, how can it do both? I always
thought an insecticide was one or the other.... ... I am assuming the
Clyfuthrin is the systemic/contact killer of adults while the imicloprid
affects newly hatched young. Anyway, I've tried it and it sure knocked down
a blooming fungus gnat problem, on the plants potted in sphagnum. I have
yet to see if it truly lasts 30 days.

K Barrett

"Pat Brennan" wrote in message
...
Most Mal labels that I have seen give a range for use. I have had no
problems at the lower rate, but have 'blacken leaf margins' on tender phal
leaves at the higher rate. Mal 57% EC calls for 1 to 2 teaspoons per
gallon
and I would use it at between 1 and 1.25 teaspoon per gallon in late
afternoon or on cloudy days. Check your label and see if it does not give
a
range to use, I think 2 teaspoons might be a bit strong. BTW, Mal is no
longer labeled for greenhouse use.
Pat


"K Barrett" wrote in message
news
I follow the directions for 'ornamentals'. I understand broughtonias &
their intergenerics can have black leaf spots or blacken leaf margins
from
malathione use. No scientific evidence for that, just an opinion from
an
old grower I know.

K Barrett

"jadel" wrote in message
oups.com...
How much 50% malathion per gal. of water is needed to treat for scale
and other nasties on orchids? The directions on the malathion package
are not specific about orchids, referring only to "ornamentals." I
think 2 teaspoons per gallon is what I want, but I am not sure.

Are there any orchid genera which will be harmed by malathion?


J. Del Col