The 67th Annual Muck Vegetable Growers Conference will be held March 28-29 at the Bradford and District Memorial Community located at 125 Simcoe St., Bradford, ON. The conference is free and registration starts at 8:30. No pre-registration is required. For more details please see: http://www.uoguelph.ca/muckcrop/muckconference.html
The 66th Annual Muck Vegetable Growers Conference will be held April 12-13 at the Bradford and District Memorial Community located at 125 Simcoe St., Bradford, ON. The conference is free and registration starts at 8:30. For more details please see: http://www.uoguelph.ca/muckcrop/muckconference.html
If you are a garlic grower and you have seen stem and bulb nematode damage in your garlic crop this year, the OMAFRA/University of Guelph Garlic Nematode Research and Extension Team would like to find out how many nematodes are left in the soil after you harvest. Continue reading Looking for garlic growers who would like their soil of their 2015 garlic fields tested for Stem and Bulb Nematode
Michael Celetti, Plant Pathologist, Horticulture Crops
Ontario Ministry of Agriculture Food and Rural Affairs
The cool wet weather experienced last fall (2014) and the recent rain in June 2015 was ideal for stem and bulb nematode (Ditylenchus dipsacci) to multiply and spread this growing season. This pest can cause significant damage to garlic crops. Obvious symptoms in garlic often appear around the time when scapes emerge in late June or early July.
Stem and bulb nematodes are often introduced into a field by planting infested garlic cloves. One stage (4th juvenile) of the nematode is particularly adapted to resist desiccation and freezing and can persist for many years under dry or cold conditions. Young juvenile nematodes within the infested cloves develop into adults during the fall and spring. When the nematodes have reached maturity, they mate and the females lay eggs. The nematodes can live from 45 to 75 days, depending upon the condition, and a single female can lay up to 500 eggs within her life span. It only takes 19 days after hatching from eggs to develop into mature adults when temperatures average around 15oC. The short period of time between egg hatch and maturity together with the frequency of reproduction during the life span of a female often results in an explosion of this pest population under cool wet conditions.
Jump to: 2015 Tomato Nematode Survey Notice
In part 1 of this article, we outlined a project in which OMAFRA staff tested some nematode sampling and handling scenarios to look at some of the ways nematode soil samples can go wrong and find out what impact to expect.
Part 1 covered the impacts of sampling: proper depth, proper mixing, size of sample area. Here in part 2, we will find out if there’s any point in sending the lab a nematode soil sample that for one reason or another didn’t end up being stored properly or delivered right away. Continue reading Counting nematodes? Proper sampling and handling is key! (Part 2)
Jump to: 2015 Tomato Nematode Survey Notice
Spring is a good time to sample horticultural fields for plant parasitic nematodes. Nematode counts in the spring are lower than in the fall, but existing nematode thresholds are based on spring sampling.
If you’ve ever sampled for nematodes in soil, you’ve probably (hopefully!) read the guidelines for sampling and handling of samples. But what if things don’t go according to plan and they didn’t get refrigerated right away or the person you gave the sampling job to didn’t quite follow your instructions? Are the samples ruined? What can you get away with and what will result in completely inaccurate results? When you’ve gone to the trouble of sampling and are about to invest in paying a lab for nematode counts, this is something you need to know.
OMAFRA specialists tested some scenarios a few years ago to look at some of the ways nematode samples can go wrong and find out what impact to expect. Continue reading Counting nematodes? Proper sampling and handling is key! (Part 1)
The US National Institute of Food and Agriculture’s Specialty Crop Research Initiative have been holding a 14-session webinar series on plant pathogens and irrigation water.
They started on October 8, 2013, but you can watch recorded versions of the webinars that you’ve missed. You can also find transcripts of the webinars and in some cases, additional resource materials. Continue reading Irrigation water quality and plant disease webinars