Volume 39, Number 11 | MAY 6, 2013
$4.25
PRACTICAL PRODUCTION TIPS FOR THE PRAIRIE FARMER
www.grainews.ca
Pests to watch for in 2013
The hardest part of insect scouting is knowing what to look for from year to year BY LISA GUENTHER
S
outheastern Alberta farmers have the unfortunate privilege of being at the crossroads of insect issues lately, says Scott Meers, insect management specialist with Alberta Agriculture and Rural Development. “It seems to be the area where virtually anything can happen, unfortunately.” Farmers in the Medicine Hat area will need to watch for a litany of pests, including pea leaf weevils, cabbage seedpod weevils and even wheat midge. Wheat stem sawfly and grasshoppers are sometimes a problem in the area as well. Wheat midge have also made themselves at home in the Peace region, particularly around Manning and in the Municipal District of Big Lakes. Though numbers are still low, Meers is concerned because they haven’t found a parasitoid to naturally check populations. “It’ll take a few more years for them to build up. But if we get no parasitism up there, they could build up into quite high levels, which has been the experience in other parts of the world.” Farmers in the MD of Willow Creek will need to look out for wheat midge as well. Canola growers in southern Alberta and the southern part of central Alberta will need to check for cabbage seedpod weevils as the crop starts to flower. Pea leaf weevils may be a problem for farmers south of Highway 1, as well as those in Wheatland and Newell Counties. Bertha armyworms are a potential scourge for central Alberta this year. Last year’s most severe infestation was south of Lloydminster. The bertha armyworm swath stretched from the Lloydminster area to the Lamont area, and there was also a hotspot in Vulcan County. Flea beetles were scattered around central Alberta and the Peace last fall. “If producers were noticing flea beetles while they
Publications Mail Agreement Number 40069240
were swathing or on late volunteer canola in their yards and stuff like that in the fall, that’s next year’s damaging population,” says Meers. But it’s not all bad news. Meers says grasshopper and wheat stem sawfly numbers are down substantially from previous years. “There may be hotspots, but really not the big massive outbreaks that we’ve seen in the past of either of those for 2013.” Farmers can access insect forecasts at www.agriculture.alberta. ca/bugs-pest. Farmers can also submit their own counts for insects such as cabbage seedpod weevils and cutworms through the site. Scott Meers is also on Twitter (@ABbugcounter).
Alfalfa weevil populations were high in Saskatchewan and Manitoba last year. Alfalfa growers should watch for them and be prepared to control them.
BERTHA ARMYWORM IN SASKATCHEWAN Bertha armyworms are likely to be a problem in several parts of Saskatchewan this year, says Scott Hartley, pest specialist with Saskatchewan Agriculture. “Certainly some (farmers) are right in the middle of the current outbreak, so it’s likely that some will still be very high this year in populations. And some areas will be starting on a decline as the outbreak ends.” Hartley says they had many reports of diseased bertha armyworms, which is usually a sign of declining populations. Alfalfa weevil populations were also high throughout most of Saskatchewan last year, and alfalfa growers should watch for them and be prepared to control them. Much like Alberta, flea beetles were a problem in parts of the province last year. Whether or not they’ll be a problem in 2013 will depend on spring conditions. “Cool, wet conditions don’t favour the flea beetles,” Hartley says. Pulse growers in southwestern Saskatchewan should look out for pea leaf weevils and consider seed treatments for peas. Pea leaf weevils are also a concern in faba beans. Cabbage seedpod weevils
PHOTOS: JOHN GAVLOSKI, MAFRI
Scott Hartley, Saskatchewan pest specialist, says there were many reports of diseased bertha armyworms last year — usually a sign of declining populations. may also be a problem for canola growers in southwestern and south-central Saskatchewan. Wheat midge risk is moderate to high for central Saskatchewan. Moisture in southwestern Saskatchewan has upped the wheat midge risk in that area as well. Hartley says swede midge isn’t widespread, but the insects reached economic levels in the Tisdale area last year. “It’s one we just want to keep watching because the potential is there for it to be a big problem.” Saskatchewan farmers can visit www.agriculture.gov.sk.ca and search the site for “insects.” The first search result will bring
Bertha armyworms are a potential scourge for central Alberta this year.
farmers to the crop insect page, which includes insect forecast maps. Hartley says they will also distribute information through the Ag Knowledge Centre bulletins and Crop Production News. If insect problems arise, the ministry will also contact local radio stations.
MANITOBA PEST FORECAST Dr. John Gavloski is an entomologist with Manitoba Agriculture. Gavloski says Manitoba farmers had localized problems with bertha armyworm last year. A Carberry trap yielded 1,500 berthas in the last week of June. Areas around Inglis and Baldur
In This Issue
were at moderate risk. Farmers in western Manitoba sprayed for bertha in late July and early August. Disease may knock down the populations this year, as diseased worms were seen last growing season in the northwest, southwest, and Interlake regions. Alfalfa weevil numbers were also higher than normal last year so alfalfa growers should monitor the first cut, along with the early regrowth of the second cut, Gavloski says. Cutworms were also a problem in parts of Manitoba in 2012. The cutworm species that caused prob-
» CONTINUED ON PAGE 4
Wheat & Chaff ..................
2
Features ............................
5
Crop Advisor’s Casebook
8
Columns ........................... 13 Machinery & Shop ............ 18 Cattleman’s Corner .......... 22
Beneficial bugs
LYNDSEY FRIESEN PAGE 7
Improve cell phone reception
SCOTT GARVEY PAGE18
FarmLife ............................ 28