Grasshoppers in Sunflowers
Provided by John Gavloski, Entomologist – MAFRI
There have been questions coming into the office and calls to specialist regarding grasshoppers in sunflowers. Here are some answers, as provided by provincial entomologist John Gavloski that we hope will be helpful.
Some species of grasshoppers will potentially feed on grasshoppers, other species will not. One of the species that is common this year, the twostriped grasshopper, will potentially feed on grasshoppers. Initially this may be an edge effect, so if you see feeding check how far it goes into the field.
There has been very little research on grasshoppers on sunflowers. The only research I am aware of is by a colleague in Texas on a species that is not one of our pest species here. These were more ecological studies. No studies have been done regarding economic threshold or grasshopper management.
What is the Economic Threshold for Grasshoppers on Sunflowers?
There is no economic threshold, and no research on grasshoppers on sunflowers to use to speculate a nominal threshold. The best we can probably do is use defoliation thresholds developed for sunflower beetles – which are 25-30% defoliation.
What if Grasshopper Control is Needed in Sunflowers?
No insecticides are registered in Canada for grasshoppers in sunflowers.
For growers of confection sunflowers – all the insecticides registered for the seedhead insects are registered for grasshopper control in other crops, with the exception of Coragen and Dipel. Coragen will kill grasshoppers, but this is not yet on the label. Dipel will not kill grasshoppers.
If you have further questions, please feel free to contact the NSAC office at (204) 745-6776.
“Producers are encouraged to take the appropriate steps to reduce risk to honey bees when spraying insecticides. This is for the benefit of both sunflower growers and beekeepers.”
Click here to read the full report.
Insect ID Card
Minimizing Harm to Pollinators in Sunflowers
“Crop staging is from V-6 to V-12. Crop development has accelerated in the heat. Significant rainfall limited progress in the South Western regions with some crop loss observed.”
Click here to read the full report.
The 2013 MB Sunflower Surveillance Survey is underway and we are in need of more fields. Please call the office at (204) 745-6776 to sign up fields or email firstname.lastname@example.org. In your email please provide field legal land description, variety, date planted as well as you contact information – email and phone number.
Reports will be release every second Monday and sent out to registered members and available online.
A partnership of five commodity groups has been formed to host the first ever CropConnect Conference in 2014.
Manitoba Canola Growers Association, Manitoba Corn Growers Association, Manitoba Flax Growers Association, Manitoba Pulse
Growers Association, and the National Sunflower Association of Canada make up the host committee for the CropConnect Conference.
CropConnect will run for two days offering a wide range of speakers, access to crop specific information, a tradeshow, and a banquet. The event will also include the five participating organization’s annual general meetings. The canola and flax industries are excited to be joining forces with the corn, pulse and sunflower sectors to create this new, top-notch event. Agriculture in Manitoba is very diverse meaning that the five organizations share a lot of the same members. The overall intention of this event is to combine some of what can be an overwhelming calendar of events down into one dynamic program that has something of value for every person in attendance.
Mark your calendars. CropConnect Conference will be at the Victoria Inn Hotel and Convention Centre in Winnipeg on February 18-19, 2014.
More information will be shared in the coming months including a website for the event and speaker announcements.
Click here to read the full press release.
The 2013 MB Sunflower Surveillance Survey is underway!
Growers interested in signing up their fields for the surveillance survey, please email (email@example.com) or call (204-745-6776) with their sunflower field legal land description.
Click here to read the introductory report – June 10, 2013
Click here to see the special bulletin on cutworms.
Sunflowers are still a good choice for late crop planting plans as once established, the crop grows quickly. Strategies for working with late-planted sunflower include:
* Switch to an early maturing hybrid.
* Tillage operation prior to planting to blacken the soil and warm it up for quicker emergence.
* Plant shallow, but into moisture, for faster emergence.
* Reduce some of the inputs to lower crop production costs (such as nitrogen fertilizer, as the yield potential has fallen slightly vs. a mid-May planting)
* Plant slightly higher populations for quicker drydown.
* Minimize use of “plant health” fungicides to avoid late-season drydown issues.
* Consider using a desiccant to aid drydown if it can be applied in time to be effective.
April 10, 2013 – Coragen® Insecticide Provides Broad-Spectrum and Residual Control of Many Pests
Powered by Rynaxypyr®, DuPont™ Coragen® is from a whole new group of chemistry (Group 28) with no cross-resistance to other chemistries. As such, it provides excellent control of pest populations that are resistant to other insecticides. It controls hatching insects all the way through to adult stages of development and is easy on bees and beneficials.
Coragen® is now registered for use on canola and sunflowers and is also registered for use on: brassica vegetables, cucurbit vegetables, corn (field, sweet, seed, pop), fodder and hay, fruiting vegetables, grass forage, greenhouse vegetables, leafy vegetables, mint, non-grass animal feeds, okra, potatoes, tuberous and corm vegetables. The broad-spectrum and residual control attributes of Coragen® make it a great tool in managing the quality of these many crops.
Please click here to see the full label.
Sourced from: DuPont Canada website.
This Winter 2012 issue features the 2012 MB Post-Registration Trial data, an in-depth look at contaminents and allergens, Confection Sunflower Variety Developmen Initiative project update and this year’s results of the Sclerotinia Spore trial.
Ag-Chieve will be providing a series of free online meetings throughout the winter exploring how western Canadian farmers can find balance in the short term & long term grain market trends. You will gain an understanding of the importance of using technical analysis to pick target areas for short term sales, using the fundamentals and long term charts to forecast the markets for the long term, and analyzing cash and basis prices. Join us to learn how to make extra $ per bushel on short term decisions and an in-depth look at whether there could be a big payoff to holding production into the winter or spring 2013. Free online registration at http://www.ag-chieve.ca/free