Recent rainfalls have brought about an abrupt change to soil conditions in some Ontario fields in just a few short weeks ago. Localized heavy rainfalls have left some fields with standing water in low-lying areas, while many fields are wet or saturated. This has raised questions about the potential losses of nitrogen (N) for the […]
Soil Sampling – Matching Field to Method Soil testing is one of the most profitable operations you can perform on your farm in any given year. A soil test is the only way to determine whether your soils contain adequate levels of plant essential nutrients such as phosphorus and potassium, and how soil parameters like […]
A few pests are starting to show up in fields. If you haven’t had a chance to take a look yet, plan to check those high risk fields that are prone to seeing soybean aphids (soybeans) or western bean cutworm (corn and dry beans) in the next week or so. Soybean aphids: Soybean aphids are […]
We should be seeing adult rootworm activity very soon so it is the perfect time to put up any CRW sticky traps. If you are new to the CRW Trap Network, Welcome! If you are returning from previous years, there are some new features you should be aware of. Trap Set Up in Field: Corn […]
Dimethoate Resistant Two-Spotted Spider Mite Populations in Ontario Soybeans Results from bioassays conducted on two-spotted spider mite (TSSM) populations collected in soybean fields across Ontario show the prevalence of dimethoate (Cygon or Lagon) resistance is high in some areas. Through a collaborative project with Dr. Vojislava Grbic, Professor at Western University, Dr. Ian Scott at […]
Corn Tar Spot Watch Begins! Tar spot has now been established in the midwestern US for almost a decade and is an annual concern in many Midwestern states like Illinois, Indiana, Iowa, Michigan, and Wisconsin. While tar spot was not as yield-limiting in these areas in 2022, it continued to expand its range across the […]
General Across much of Ontario major crops and forages are progressing well. Evidence of moisture stress is present on various crops, but some relief came over the period of June 11-14th with scattered rainfall periods. Keeping appraised of incoming rainfall is at the back of everyone’s mind. Be aware of various networks and stations where […]
True armyworm (TAW) has been spotted at near threshold levels in a winter wheat field near Niagara and has also caused significant damage in late planted seedling corn in Chatham Kent. Though most of our YEN wheat sites being scouted weekly have picked up only low levels of TAW in a few of the sites, […]
General Field crops in general across Ontario are doing well and welcomed the rain of the past few days. The need for moisture is coming up as the corn begins rapid growth. Winter wheat looks good across the province although have been impacted by dry conditions in areas. Rain across the province was welcomed but […]
Summary Background Throughout the growing season, microbes within the soil break down organic nitrogen contained in soil organic matter and release it as plant-available ammonium. This process is known as nitrogen mineralization. Nitrogen mineralization is favoured by warm soil temperatures with adequate soil moisture and aeration. Excess moisture can slow mineralization or increase the potential […]
Conditions Field conditions across most of the province are drier than normal. This generally will have little effect on corn and soybeans since both are at the early vegetative growth stage. The impact on winter cereals could be significant since they are already out in head and at, or nearing, pollination. Forages There is an […]
Cover crops can produce nitrogen. We looked at when different species release nitrogen and the impact that adding manure has on the timing and release of nitrogen. The simple answer Predicting nitrogen (N) availability from cover crops is complicated. Cold and wet conditions in the spring negativelyimpact soil microbial activity and can result in significant […]
Key Points: What Causes Fires? The process of forage heating up and then burning is typically called spontaneous combustion. Spontaneous combustion for hay usually occurs within the first two months of storage. Unusual growing conditions, such as an early harvest window or immature crop, can complicate the drying process and increase the risk of fire. […]
Key Points: What Causes Fires? The process of forage heating up and then burning is typically called spontaneous combustion. In silos, forage can dry down if air enters the silo through leaks in walls or doors; this results in the potential for fires throughout the whole year. Spontaneous heating and combustion occur when sufficient moisture […]
Split application of nitrogen (N) in corn has been shown to offer many benefits to farmers, including a reduction in the total N required to produce a high-yielding crop. In-season application matches N supply closer to corn’s uptake pattern, and because of this, there is less nitrogen sitting in the soil in forms available for […]