It is rare to experience back to back armyworm outbreak years. This is usually because the natural enemies (particularly parasites and entomopathogens) build up in an outbreak year and are in good supply the following year to keep up with the armyworm. However, armyworm outbreaks do tend to occu... Continue reading
With corn planting season soon upon us, it is a good time to remind everyone to take extra precautions to try to reduce the risk to bees being exposed to neonicotinoid contaminated dust from corn planters. Virtually all corn seed is treated with a neonicotinoid insecticide (ie. Poncho or Cruiser), a... Continue reading
We are looking for growers who are interested in participating in our study this spring/summer. Art Schaafsma (UGRC) and myself have received funding to work on some particular questions with regards to corn planter dust and bee incidences.
We are looking for 2 corn growers per county from the ... Continue reading
Dr. Rebecca Hallett will be offering a Swede Midge Identification Workshop on Friday, April 5th from 10 am to noon, University of Guelph.
Session in the lab, looking at swede midge and other easily confused insects on sticky cards with naked eye and microscope; swede midge specimens on sticky ca... Continue reading
Written by: Tracey Baute - Field Crop Entomologist and Greg Stewart - Corn Specialist, Ministry of Agriculture and Food and Ministry of Rural Affairs
A high level of concern was raised last spring regarding bee kills and corn planting. Many growers are asking what actions they can take to help redu... Continue reading
A winter wheat field near Owen Sound has 4 to 5 acres of "missing plants", cut off at the soil level. Not many insects could do that kind of damage this time of year. It sounds like a case of winter cutworm. It was to the day, 4 years ago when I wrote a CropPest article about this pest. ... Continue reading
The brown marmorated stink bug (BMSB) is an invasive alien species native to China, South Korea, Taiwan and Japan. It was introduced to North America in the mid 1990s, and was first detected in Allentown, Pennsylvania in 2001. While BMSB is capable of natural spread, the pest is also ... Continue reading
Stink bugs have been showing up in soybean fields in south western Ontario in noticeable numbers over the past 2 weeks and reports of stink bug numbers from Ohio are showing a similar trend. We may see more stink bug in the soybean crop this year then in previous years so it’s time to be on ... Continue reading
Although we are missing some data from a few trap locations it appears as if most of the province has experienced peak flight for WBC. We hit peak flight earlier this year then in previous years but this consistent with what we have seen with other Lepidoptera pests this year. Counties with an ast... Continue reading
Reports of two spotted spider mite in some corn fields have been coming in. This pest is not normally a problem in corn but due to the hot, dry weather this year spider mites are showing up in numbers high enough to cause visible damage. Spider mite infestations start at the field edge and mov... Continue reading
Note: This post was originally published in July of 2010, but once again in 2012 there are reports of Japanese beetles feeding on soybeans. In particular it would be worthwhile to go and click on the article below that shows what the leaf feeding insects look like along with threshold values.
The... Continue reading
Peak flight is a bit difficult to pin point this week because there is some data missing from our week 10 trap reports however, we have received some missing data from previous weeks so I can provide information on peak flights for some counties and possible peak flights for others. Some areas are... Continue reading
Since we’ve been getting a bit of rain across the province in the last week I’ve been asked about how the rain will affect spider mite populations in soybeans. Rains are very beneficial to help keep populations of spider mites down but don’t assume that because it rained our spider mite ... Continue reading
The butterfly enthusiasts had a good spring this year with the early arrival of the red admiral butterfly and large flights of other species. Unfortunately for us, that also meant some pests also arrived in great numbers.
Speaking of pests has anyone seen this caterpillar in soybeans? This is... Continue reading
Our WBC trapping network has been catching relatively few moths over the past weeks but last week some higher numbers were reported. These numbers are still a bit behind what I would have expected considering the warmer weather but the trend is towards increasing numbers. Just last week the scou... Continue reading