Got something to say? Click here to send a mail to Lifestyle editor Thamar Houliston.
Researchers in south-western France looked at 221 cases of brain tumours and matched those cases with 442 healthy individuals of similar age and background from the general population.
They found that all agriculture workers exposed to pesticides had a slightly elevated risk to the disease compared with healthy counterparts.
Those exposed to the highest levels of the chemicals ran more than twice the risk, and especially so with a form of cancer known as glioma, which is rapidly lethal.
A "significant increase" in cancer risk was also seen among people who treated house plants with pesticides.
The study, released online on Tuesday by the British journal Occupational and Environmental Medicine, adds to previous investigations into the link between pesticides and cancer.
The research took place in the Bordeaux wine-growing region, where 80 percent of all pesticides used are fungicides. The chemicals are mixed and sprayed in a mist to protect vines from fungus attack.
AFP