why DOES water work on aphids???

ken_adrian Adrian MI cold Z5November 10, 2012

bellybutton gazing time ...

does it simply knock them off.. and they are too stupid to find their way back???

or does it literally crush them.. presuming the water blast is hard enough to knock them off??? .. w/o damaging the plant ...

do aphids have wings.. or is that what makes the bug otherwise.. and if they have wings.. why not fly back .. presuming they werent crushed as previously asked ...

so many questions.. so little time ...

you may return to your regularly scheduling events...

ken

Thank you for reporting this comment. Undo
Kimmsr(4a/5b-MI)

A sharp stream of water knocks the Aphids off the plant, it does not crush or otherwise harm them, and they are too stupid to find their way back to where they came from and they then starve to death.
Some Aphids do have wings, at one stage of their develpment but not all Aphids have wings and even those that do only have them for a short time.
Perhaps this from the University of California will be of some help.

Here is a link that might be useful: About Aphids

    Bookmark   November 11, 2012 at 7:01AM
Thank you for reporting this comment. Undo
ken_adrian Adrian MI cold Z5

and they are too stupid to find their way back to where they came from and they then starve to death.

==>>> well i often curse mother nature..

but here.. lets give her a gold start.. lol .. 2 thumbs up

ken

ps: so i dont need my 2 hundred thousand foot pound pressure water pump for this??? ... lol ..

    Bookmark   November 11, 2012 at 9:39AM
Thank you for reporting this comment. Undo
Tiffany, purpleinopp GardenWeb, Z8b Opp, AL

I've done this to elephant ears, a Gardenia shrub that had 'em BAD, and various potted plants. The force needed to knock aphids off of EE's with a stream from the hose is often cosmetically damaging to the leaves but they continue to function even if they are somewhat damaged. Ants may bring them back eventually.

As I'm sure you know, Ken, aphids like to get on the bottom of leaves and in the crotches of nodes. Knocking them off with water not something you can do with a shower setting, you need a pretty strong stream. So for this reason, I haven't found it to be practical on a large area but works well on plants that I micro-manage. Just knocking a significant amount of aphids off of something like a shrub seems to help a lot, allow the plant to recover faster than the few you missed are sucking it dry.

For house plants I use a squirt bottle set on a direct stream setting. This seems to kill them in some way because they do not crawl or walk around after they get knocked off. I sit down and hold each leaf, check both sides, so I would notice if the ones I knocked off were crawling around. I used to be concerned with turning the plants sideways so the critters wouldn't fall into the pot but I'm a lot less anal about it since they don't seem to come back unless/until the ants bring them. Aphids don't seem to show up unaided/unattended.

    Bookmark   November 11, 2012 at 2:33PM
Thank you for reporting this comment. Undo
Kimmsr(4a/5b-MI)

Seldom is the pressure of water from the garden hose (45 to 60 psi) necessary to knock Aphids off any plant. A bottle with a sprayer attachment is usually most ample.
Water with the pressure of your supply system can, and will, damage plants.

    Bookmark   November 12, 2012 at 7:36AM
Thank you for reporting this comment. Undo
ken_adrian Adrian MI cold Z5

indoors.. couldnt you just add a bit of dish soap ... to aid the kill ..???

ken

    Bookmark   November 12, 2012 at 8:07AM
Thank you for reporting this comment. Undo
Tiffany, purpleinopp GardenWeb, Z8b Opp, AL

Dish soap is not for plants. This wrong idea needs to be corrected. There are substances in dish soap that are not necessary for insecticidal purposes and can be harmful to plants. If you want to use insecticidal soap, that's what you should get.

I wasn't talking about a garden hose with a naked end above, was assuming there's some kind of adjustable nozzle.

    Bookmark   November 12, 2012 at 12:12PM
Thank you for reporting this comment. Undo
tsugajunkie z5 SE WI

According to Colorado State University...

"Hosing plants can lethally injure aphids and very few surviving aphids that are knocked to the ground can successfully find their way back onto their host plant."

So yes, the water itself can and does kill them due to the fact they are such soft bodied critters.

tj

    Bookmark   November 12, 2012 at 5:19PM
Thank you for reporting this comment. Undo
Kimmsr(4a/5b-MI)

Today the term "dish soap" can be used by the manufacturers of detergents, synthetic stuff often made from the residue of the petroleum distillation process. Most all of the "soaps" we buy today are really detergents since few are still made by reacting animal fats with lye.

    Bookmark   November 13, 2012 at 6:52AM
Thank you for reporting this comment. Undo
ken_adrian Adrian MI cold Z5

hey junkie.. so they arent that stupid.. lol ... never underestimate ma nature ...

of course.. its all about population control ...

the few that find their way back.. wont do significant damage.. until they replicate a couple billion new kids i suppose ...

ken

    Bookmark   November 13, 2012 at 7:41AM
Thank you for reporting this comment. Undo
flora_uk(SW UK 8/9)

With pot plants you can hold the whole thing sideways under the tap/faucet(with one hand over the potting medium so it doesn't wash out) and clean it using your fingers to sloosh the foliage. No need for any additions to the water.

    Bookmark   November 15, 2012 at 10:36AM
Sign Up to comment
More Discussions
Aphid central.... At my wit's end...
Every single over-wintering pepper I have is inundated...
theripetomatofarm
Question for the 'Regular' contributors
I've noticed a real slow down in this forum since the...
rhizo_1 (North AL) zone 7
Weird white stuff growing on my plants.
I've noticed weird stuff growing & spreading on...
Cheryl Tan
Hardiness zone question
I've always wondered about hardiness zones. When a...
cakbu
atrazine
I am not a novice gardener, and yesterday I applied...
nancy1648
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™