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Depending on the poison, possibly yes. In addition to being absorbed through the pores (stomata) in the leaves, all insecticides commonly used have a half-life; once several half-life periods have passed, they are nearly undetectable. Applied properly, this can allow treatment to be effective during the night, with no measurable trace of the toxin remaining on the leaf surface in the morning. Are they likely to select an appropriate pesticide with a short enough half-life, then apply it in the correct concentration? Probably not, but that's a separate question. 
As a side note, whenever I hire a bug sprayer for the house, I ask him "What's the half-life of that stuff you're spraying?" If he doesn't know the answer, he doesn't come back. Ever.
Will Rogers never met me.
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Roger Wright wrote: "What's the half-life of that stuff you're spraying?" If he doesn't know the answer, he doesn't come back. Ever.
I'm guessing you never get your house sprayed. 
There are only 10 types of people in the world, those who understand binary and those who don't.
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I haven't in a long time. I do it myself, like most everything else. My Dad was an agronomist, an expert in soils, plant feeding and culture, and pest identification and control. He taught me a lot more than I now remember, but these new kids aren't being taught anything at all! 
Will Rogers never met me.
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I suspect wide-scale famine, disease and war will solve the problems of climate change, bee collapse, etc. fairly soon by reducing the world's population to a more sustainable level. Not trying to start to start an opinion war here, but it really does seem like we've created high-level problems faster than we can solve them, and having never addressed foundational problems, they will rear their ugly heads as a natural response to those higher level problems.
Marc
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Marc Clifton wrote: by reducing the world's population to a more sustainable level
People who want to reduce the world's population should start with themselves. Any volunteers?
Within you lies the power for good - Use it!
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Sure, and people who want to solve world hunger should just eat. Much as people like to believe that contributing on a small scale changes anything, it really doesn't. Meaningful change starts with organization, rallying, politics, not with insignificant ants. Convincing ten other people is ten times as effective as just doing it yourself, whatever "it" is.
Also, that's not what Marc wrote, he wrote that it will happen (automatically), not that he wants it to happen or that he wants it to be done (actively).
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Malthus was a clear thinker, wasn't he?
Will Rogers never met me.
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Poor little bvggers have the odds against them
1) the varroa mite (not yet here in the south of the planet)
2) climate change
3) pesticides
considering that bees are a necessity to produce food for us humans, you'd think we had better plans by now - then again, we think we're the smartest thing on the planet, and that's plainly not true
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Considering that the bees are responsible for a significant portion of the pollination of many plants, a bee die-off would precede a large plant die-off as well.
Software Zen: delete this;
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yeah - that's sorta what I meant by "bees are a necessity to produce food for us humans", but, looking at your comment, it goes further than us humans
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Garth J Lancaster wrote: not yet here in the south of the planet
Producing a shortage here nevertheless because they are now being exported in huge numbers to make up for losses in the northern hemisphere.
Peter Wasser
"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts." - Bertrand Russell
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Shambles?[^]
2 years to go and only 10% complete.
I see trouble ahead.
Every four years the worlds greatest athletes descend upon one country to compete for the ultimate prize.
Then, two years later there is an Olympic Games.
---------------------------------
Obscurum per obscurius.
Ad astra per alas porci.
Quidquid latine dictum sit, altum videtur .
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This happens at nearly every event. I remember the stories that England might step in to host the 2010 WC as South Africa were way behind schedule (England already having enough stadiums with the required capacity). I think there were more about the Brazil WC this year.
The 2016 Olympics will definitely take place in Rio.
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Anywhere's better than SA.
Vuvu-f#*ing-zelas.
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I'm sure the marketing b'tards from hell good people of Brazil will come up with something 'ethnic' to psii of the rest of the World and give the home team a double advantage.
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Well I for one look forward to the Women's Brazillian Waxing context.
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This was soccer. And vuvuzelas were great.
~RaGE();
I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus
Entropy isn't what it used to.
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Shouldn't that be 1 year later?
One day I aspire to having a signature.
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their, there, they're
Along with Antimatter and Dark Matter they've discovered the existence of Doesn't Matter which appears to have no effect on the universe whatsoever!
Rich Tennant 5th Wave
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I don't understand you're post. Your sure you didn't miss anything? 
Anything that is unrelated to elephants is irrelephant
Anonymous
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The problem with quotes on the internet is that you can never tell if they're genuine
Winston Churchill, 1944
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I'd just like a chance to prove that money can't make me happy.
Me, all the time
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