Cooler temperatures extend flowering for canola and flax

MAFRI crop report for July 29, 2013

Weekly provincial summary

  • Crop growth has slowed with the cooler temperatures. However, the moderate temperatures will benefit flowering and grain filling of many crop types.
  • Continuing wet conditions in the Southwest and Northwest Regions will impact crop yield potentials. Rainfall and humidity is also impacting haying progress and quality of hay in areas of Manitoba.
  •  Disease pressure and insect activity continues to be monitored.

Southwest Region

Rainfall amounts varied from five to 20 mm with heavier amounts occurring in southern portions of the region. Moisture levels continue to be surplus with localized flooding occurring. Crop lodging continues to be an issue.

Blackleg lesions are being reported, especially in areas damaged by recent hail and windstorms. Moderate temperatures have extended the flax flowering period.

Corn and soybeans have seen crop development slow with the cooler temperatures.

Insect activity over the past week was limited to continued grasshopper damage in pasture and hay land in eastern and central portions of the region, especially in areas east of Highway No. 10 from Minnedosa to Gladstone.

Pasture conditions continue to benefit from the frequent showers and moderate temperatures. Haying progress was once again slowed by the high humidity and frequent showers with only 60 to 75 per cent of the first cut now reported as completed. There is little to no chance of slough or marsh hay being harvested this year.

Northwest Region

The weekly accumulation of precipitation ranged from lows of around 18 mm at Dauphin and Roblin, to 50 to 60 mm in the rest of the region.

Crop development, stand consistency and crop conditions remain variable across the region.

Some evidence of fusarium head blight is reported. The weekly bertha army worm moth trap counts have diminished through the region; moderate seasonal risk levels exist through a sector north and west of Roblin and parts of the Swan River Valley.

Unfavourable haying conditions resulted in little progress this past week. While additional stands have been cut, the intermittent rains, poor drying and wet field conditions limited the amount of baling completed this week. Through the most moisture-impacted areas, significant acres of forage has poor quality with being turned and weathered several times. Overall, approximately 50 per cent is baled and 35 per cent has been cut with yields being above average in some fields, though generally yield is average. Many pastures are fair to good and the native hay lands have also improved to fair.

Central Region

Much of the region reports five to 15 mm of precipitation. Crop growth slowed with the cooler temperatures, particularly with overnight lows down into single digits.

Cereal crops are in full head and the later-seeded fields are receiving fungicide applications for fusarium head blight. Leaf diseases are evident.

Cooler temperatures and rains are extending the canola-flowering period. Fungicide applications for sclerotinia management continue. More blackleg leaf lesions are being reported throughout the region, along with some basal cankering.

Diamondback larvae are being found in canola with no significant damage at this point. Higher bertha army worm trap counts are being seen, with numbers in the low to uncertain risk range. Numbers warrant ongoing monitoring for crop damage. Grasshopper activity continues in much of the region. Evidence of the fungal infections that attack grasshoppers has been noted.

Wet weather and high humidity continue to make haying a challenge. First-cut dairy hay is complete; baling of first-cut beef-quality hay is almost done. Average yields are expected for most areas. Most pastures are growing rapidly and are in good to excellent condition.

Eastern Region

Rainfall amounts ranged from zero to 25 mm this past week, with some reports of 50 mm.

Crops in general are doing well.

The biggest concern in the region continues to be insect activity, particularly grasshoppers, green cloverworm, army worms and other defoliators. In canola, concerns are moving from leaf-damage to pod-damage issues. No soybean aphids have been reported yet. Some insecticides have been sprayed in response to grasshopper, green cloverworm and army worms in northern parts of the region. These applications have been done on a field-by-field basis.

Root rots are showing up in soybeans; producers are currently trying to determine what fungi are causing the damage.

Hay conditions in the region are rated as 75 per cent good, 15 per cent fair and 10 per cent poor. First cut is finishing up with progress rated at five per cent standing, 15 per cent cut and 80 per cent baled or silage. Second-cut progress is rated at 80 per cent standing, 10 per cent cut and 10 per cent baled/silage.

Pasture conditions in the region are rated as 50 to 75 per cent good.

Interlake Region

Most reports of precipitation ranged from 35 to 45 mm. In some areas, water is still sitting in fields.

Producers started preharvest applications on winter wheat fields.

There are some concerns in the North Interlake regarding army worms in spring-seeded crops. Some producers have counts as high as four to five per square foot prior to the July 25 rainfall.

First-cut hay is still ongoing in the Ashern and Moosehorn area. Most other parts of the region first cut are nearing the end with native hay acres being cut and baled. Pasture condition are average throughout the region.

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