"Where there was no spraying cultivation was up, where spraying is occurring, cultivation is shrinking, " Mr Walters said.
Spraying the walls of houses with DDT helped the U.S. conquer malaria 60 years ago.
The engine then acts like a wireless access point, spraying water--or data--wherever it's needed.
Treating seeds in this way enables farmers to use lower doses of insecticide than spraying.
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But unlike manual eradication, spraying may merely wipe out one harvest, rather than the plant.
And they certainly won't be spraying no-look backheels all over the pitch when they do.
It portrayed a housewife spraying -- inundating -- her home with the potent bug killer.
The few mosquitoes that were trapped after spraying were thought to be newly emerging adults.
Farms are being disinfected and helicopters are spraying insecticide while ground workers clear stagnant water.
They set up their hoses and start spraying water on the blaze as quickly as possible.
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Even before the latest spraying campaign, there were some signs that coca output in Colombia was declining.
Given the vagaries of aerial spraying, this would bar the use of tebuthiuron in many coca fields.
On our drive from Boise, Idaho to Park City, Utah we saw farmers spraying their crops from planes.
Aerial spraying is to be used for the first time to target caterpillars of the oak processionary moth.
The government is distributing bed nets, draining mosquito breeding grounds and spraying huts with DDT to kill mosquitos.
In the background one of the offshore supply vessels was actually spraying water all around the Discover Enterprise.
Nor is it likely that the tiny quantities used in house-spraying have any serious effect on the environment.
"The system is very chaotic and collisions are spraying up a huge cloud of fine dust, " Su said.
The Ibrox side were spraying the ball about with confidence after the break as Celtic struggled to get possession.
But the charge that the fund has been spraying money around is unfair.
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It involves spraying a tiny (0.15x0.15mm) area of a fingerprint with an electrically charged mixture of methanol and water.
DDT-spraying would be cheap and effective, but says that the government has no definite plans to start spraying again.
The official said that last year Karzai had authorized ground spraying, but, under pressure from the Europeans, decided to wait.
But European governments, while criticising spraying, have not reached into their pockets to back the alternatives they claim to favour.
Every last speck of black paint has to be cleaned from the tubes of the paint-spraying robots with expensive solvents.
Given its recent history, you can see why HP's boss might be cautious about spraying money around to little effect.
Both countries had agreed to stop the spraying for a while because Ecuador said that it was damaging the environment.
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He was fastidious about Terri's appearance, spraying her with perfume and insisting that she be dressed in the latest fashion.
Rinse off the soap, again spraying from top to bottom, letting an adequate supply of water stream down the finish.
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Added to that, spraying tall trees is a much more complicated and unhealthy business than treating low-growing fruit and vegetables.
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