THURSDAY, MAY 16, 2013
VOL. 91 | NO. 20 | $4.25
DO OIL & FARMERS MIX? | P33
SERVING WESTERN CANADIAN FARM FAMILIES SINCE 1923
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NEXT WEEK: 10 YEARS AFTER BSE | SPECIAL REPORT
LABOUR | RESEARCH
Ag Canada braces for sweeping cuts
INSECTS | PESTICIDES
Tiny insects, big problems
Hundreds to lose jobs as government cuts costs BY BARRY WILSON OTTAWA BUREAU
The Conservative government served notice to 700 Agriculture Canada employees last week that their jobs are in jeopardy. Unions said more than 400 jobs will be lost to cost cutting. Research, innovation, technical support and policy analyst positions were heavily targeted. Critics said the cuts show a disturbing disregard for basic research within the department. The Professional Institute of the Public Service of Canada said of the 350 employees who were targeted with letters of potential job loss, 79 are scientists, 76 are information specialists, 14 are biologists and five are research managers. The targeted positions are concentrated in the Ottawa region but extend across the country.
Fleas: 1 Control: 0 | Flea beetles developed a tolerance to the latest pesticides in just seven years. How did that happen and what does it mean for crops?
These striped flea beetles are only about two millimetres long but can wreak havoc on crops. | MICHELLE HOULDEN PHOTO
SEE JOB CUTS, PAGE 2
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ILLUSTRATION, SASKATCHEWAN AGRICULTURE PHOTO
BRANDON BUREAU
Pest management experts have determined that neonicotinoid seed treatments are becoming less effective against flea beetles. As a result, new chemistries and approaches will soon be needed to control flea beetles in Western Canada, said Bob Elliott, an Agriculture Canada entomologist. “We have certainly seen weaknesses in our current registered products,” said Elliott from his office in Saskatoon. “We’ve seen some limitations and we’re scrambling to make up for those deficiencies…. Down the road we will have to be looking for new chemistries that give us better control against striped flea beetles and under cooler, wetter conditions.” Elliott has worked with other Agriculture Canada scientists and a provincial entomologist in Manitoba to study the risk of flea beetles to canola production and the efficacy of insecticidal seed treatments. Grower concerns about seed treatments were the genesis of the research, which is a joint initiative
between Agriculture Canada and the Canola Council of Canada. “(The canola council) indicated three years ago that they had received a number of complaints from producers about so-called seed treatment failures,” Elliott said. He said he had observed before the research project that neonicotinoid seed treatments performed erratically. They provided excellent protection against flea beetles in some years but not in others. Working with a hypothesis that seed treatments provided better protection in warm and dry conditions, Elliott set out to measure how temperature and soil moisture altered neonicotinoid efficacy on crucifer and striped flea beetles. They are the two primary varieties that forage on immature canola plants in Western Canada. He discovered that neonicotinoid seed treatments killed only onequarter to half of crucifer flea beetles in wet soil. The study also confirmed earlier research that had determined that neonics are toxic for crucifers but aren’t nearly as lethal for striped flea beetles.
The crucifer flea beetle was once common on the Prairies. Now, the striped flea beetle is turning up in record numbers. | SASKATCHEWAN AGRICULTURE PHOTO
The evidence demonstrating that neonics are less effective in cold, wet conditions and against striped beetles is compounded by two factors: a population shift toward striped flea beetles and a trend toward canola growers seeding crops earlier in the spring. Elliott and Agriculture Canada colleague Julie Soroka have monitored flea beetle populations in canola fields at the Saskatoon research centre since 2003. They
determined that the crucifer was the dominant species between 2003 and 2009, comprising 97 percent of the population. “Since 2009 … we’ve seen quite a shift in the composition of that population,” Elliott said. “In 2011, for example, the frequency of striped flea beetles jumped from less than one percent to 62 percent of the population … in the early seeded (canola).” In later seeded canola, striped flea beetles increased from one percent to 36 percent in the Saskatoon fields. Prairie flea beetle surveys from 2007 to 2011 convinced Soroka that striped beetles are becoming more common in many regions. In a 2012 report on the flea beetle species shift, Soroka said the striped flea beetle has displaced the crucifer “as the most frequently encountered flea beetle in central Alberta, central Saskatchewan, and much of Manitoba. And once rarely encountered in the rape-canola fields of southern Canada, (the striped) is now found there in increasing numbers.” SEE TINY INSECTS, PAGE 3
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BY ROBERT ARNASON