What is your plan for Spotted Wing Drosophila control in 2016?

*bushberries = Crops in crop group 13-07B,  including elderberries, haskaps, saskatoon berries
Figure 1:  SWD survival and development can be reduced by  holding fruit at 2°C immediately after harvest and all through the marketing chain.

Spotted wing drosophila is an invasive insect pest that is here to stay.  We know it is present from Windsor to Ottawa and at least as far north as New Liskeard. Management of this difficult pest requires a plan.  

Plan to improve spray coverage: Make sure that each spray provides the best possible control by ensuring verythorough coverage of the crop. SWD flies are weak fliers and hang out around the inside and lower canopy.  Prune your crop for better spray penetration and better SWD control. 

 
Plan your insecticide program:  Insecticides which are fully registered for spotted wing drosophila have been included in OMAFRA Publication 360, Guide to Fruit Production, 2016-2017. We expect that additional products will be registered through the emergency use registration process. Check the OMAFRA website (Ontario.ca\spottedwing) and ONFruit.wordpress.com for a full listing of products registered in 2016. Weekly insecticides are required when flies are active and ripe fruit is present. It is important to choose products from different groups rather than use one product or group of products repeatedly. 
    
Plan to harvest routinely: When SWD is active, crops should be harvested every 2-3 days and all ripe fruit removed with each pass. Unmarketable fruit should be removed from the field at the same time as fruit is harvested. 

Plan a continuous cold chain after harvest: Harvested fruit should be cooled quickly and stay cold throughout the various stages of marketing. Temperatures below 2°C (35°F) will slow the development of any SWD eggs and larvae in the fruit. A high percentage of eggs and larvae will be killed in cold storage. 

Plan to do salt-water tests: We think that monitoring fruit for early signs of SWD infestation is easier and more efficient than trapping. Information on how to do this test is posted at Ontario.ca\spottedwing. Collect your supplies and make the salt water solution up ahead of time, so the task can be a simple routine during harvest.

Plan to say informed: The Ontario Berry Growers Association and OMAFRA will co-ordinate a regional monitoring program for SWD in 2016. Traps will be set at 20-25 sites across Ontario and maintained with the help of volunteers and OMAFRA students. Updates on SWD activity will be posted weekly at Ontario.ca\spottedwing and ONFruit.wordpress.com.  Check these information sources often for updates on SWD activity in your area.  

 

Publish date: 
Wednesday, April 27, 2016

Click to leave a comment

CAPTCHA
For security purposes, please confirm you are not a robot!

RELATED NEWS

PMC to finalize research priorities July 9

The Pest Management Centre is in final stages of identifying 10 priority ‘A’ projects says executive director Dr. Marcos Alvarez. That’s a tough exercise to winnow from the current list of 47 projects, given the diversity of Canada’s horticultural industry.  

 

Bioceres WP registered for additional greenhouse crops

This biological mycoinsecticide label has been expanded via the Minor Use Program for management of whiteflies, aphids and thrips on additional greenhouse-grown crops in Canada. These include eggplant, lettuce, mint, onion and Brassica transplants, Asian water spinach and strawberries. 

Syngenta Group announces new structure

Multinational Syngenta organizes crop protection and seed units in Switzerland, Israel, United States and China.

 

Closer insecticide has broader label for potatoes

PMRA has granted approval for Closer insecticide in root and tuber vegetables to control leafhoppers and tarnished plant bug in addition to the existing label for aphid control.

PMRA delays re-evaluation decisions

Due to COVID-19, the Pest Management Regulatory Agency is likely delaying several re-evaluation decisions. Growers should note that some of those decisions impact horticultural products.