For years, I had a row of Hibiscus along the W. side of the house. The whitefly infestation was unrelenting. I tried everything that was on the market, but finally gave up & took them out.
But at the same time I had a large Hibiscus bush on the N. side of the house
that was handsome, healthy, gorgeous flowers in season -- and nary a whitefly!
Unfortunately I don't have a record of the variety either of the defunct or the
Anybody know if there are certain varieties that are more subject to whitefly? I've been curious for years.
In southern California, the afternoon sun definitely gives more heat
than the morning sun. Morning haze filters the sun; the haze burns away
by noon. The hibiscus on the west side (afternoon sun) might have had
heat stress and were thus more susceptible to insect attack than the
hibiscus on the east side (morning sun).
If whitefly becomes a serious problem in my garden, I do one of the
* Spray with malathion.
* Spray with a systemic insecticide.
* Feed with a commercial fertilizer that contains a systemic insecticide.
* Ignore the whitefly, which will eventually go away.
This all depends on the plant and -- with the systemics -- the proximity
David E. Ross
Climate: California Mediterranean, see
On Sunday, September 27, 2015 at 5:21:35 PM UTC-7, David E. Ross wrote:
The "bad" Hibiscus was against a block wall, so did not get direct afternoon sun but did get mid-day sun.
The "good" Hibiscus was not on the E. side, but, as I wrote, on the N. Side.
As I wrote, I tried every possible remedy on the market.
I'm still interested if anyone knows why one variety would be so susceptible
but another not at all.
Am am still interested if anyone knows whether
That's enough to cook the plants with radiant heat... never place
plants at a masonary wall that receives direct sun regardless time of
day... one hour is 45 minutes too long. If there isn't room to have
at least a six foot space between a masonary wall and plants cover the
masonary wall with wood/bamboo privacy fence, will probably be much
more attractive. Btw, afternoon sun strikes a vertical wall with far
more intensity than when the sun is directly overhead.
On Tuesday, September 29, 2015 at 4:26:20 AM UTC-7, Brooklyn1 wrote:
Thanks, I do appreciate the input.
Though this/these Hibiscus are long gone, I still wonder if some varieties
are more susceptible to Whitefly. The bush on the N. side, for example, DO
ES receive hot Western sun in the afternoon. It is against a white masonry
porch wall, though it is so tall that most growth is clear of the actual w
all. Never had the slightest problem, even in this town, the Home of the W
hitefly, which has infested my Lemon tree for decades.
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