Coping with Hail Damage to Forage Crops and Pastures
Tag: alfalfa
How do I manage alfalfa weevil?
Alfalfa weevil is a major alfalfa pest in Ontario. Larvae feeding on alfalfa leaves can reduce both yield and forage quality. The simple answer As alfalfa gets taller it can tolerate more weevils before action is necessary to protect forage yield and quality. Action thresholds for managing alfalfa weevil are as follows: Stem Height Number […]
How do I manage potato leafhopper in alfalfa?
Potato leafhopper is a major alfalfa pest in Ontario. Yield losses may reach 50%, and crude protein content can drop 2-3% from heavy infestations. Potato leafhopper feeding decreases stand vigour, slows regrowth and increases winterkill. The simple answer As alfalfa gets taller it can tolerate more potato leafhoppers before action is necessary to protect forage […]
Fall Rest Period for Alfalfa
Key Points When is the fall rest period? The fall rest period (sometimes called “critical fall harvest period”) for alfalfa is 450 growing degree days, base 5°C — or approximately 6-weeks — before the average date of the first killing frost (-4°C for several hours), when alfalfa stops growing. Not cutting during this period allows […]
Alfalfa Weevil
This article was originally written by Joel Bagg in 2013. It was edited May 1st, 2023 by Christine O’Reilly to reflect current insecticide options to control alfalfa weevil. Alfalfa weevil can be an issue in Ontario, particularly in south-western parts of the province. While outbreaks tend to be isolated, they can be severe and dramatically […]
Spring Scouting of Alfalfa
Photo: Scouting a few days after a spring frost is a good way to assess the severity of any damage. Good agronomy is very important for achieving good yield and quality in forage crops. While good agronomy includes a fertility plan, seeding techniques, and harvest management, it also relies on proactive decision-making. The only way […]
Killing off Roundup Ready Alfalfa
Six tank-mix partners are recommended for the removal of Roundup Ready Alfalfa and since they vary significantly in cost (Table 1), their effectiveness was evaluated in a trial conducted at the Elora Research Station in 2018-19. Growing degree day accumulation after herbicide application appeared to have the greatest effect on the control of Roundup Ready […]
Diagnosing Nutrient Deficiencies
Nutrient deficiencies can seriously impact crop yield. Certain deficiencies are seen every year in Ontario field crops, such as nitrogen deficiency in corn and manganese deficiency in soybeans. Others are brought on or made worse by environmental conditions – for example, potassium deficiency in soybeans and boron deficiency in alfalfa (Figure 1) during dry spells. […]
Are insects eating your forage crop?
Reports are coming in about insect pressure in forage crops and pastures across the province. Central and eastern Ontario currently have high potato leafhopper pressure, while districts across northern Ontario are challenged by armyworms. The only way to know if a field has insect pressure is to scout it! More information about scouting forage crops […]
Mount Forest Ag Breakfast Minutes – April 23, 2019
Who was in attendance? 26 agricultural professionals working in the counties of Waterloo, Wellington, Huron, Grey, Bruce, Dufferin and Simcoe counties. The past week’s weather summary: 40-50 mm of rainfall fell over the Easter weekend and understandably, field conditions are extremely wet with essentially no field activity. This will put additional pressure on livestock producers who […]
July 2018 Forage Report
Map shows the percent of average rainfall received across Ontario in July, 2018 Lab analyses indicate that quality decline for first cut was very fast, and test results range from low to very high quality. Producers cutting based on calendar date rather than crop stage may have lower quality forages than expected. Pasture regrowth has […]
Ontario Field Crop Report – July 5, 2018
Hay Cutting Height is a Management Tool Challenging growing conditions in 2016 and 2017 have weakened mature hay fields and put pressure on stands established during those years. When forages have been stressed it is a good time to think about how management practices can affect persistence and vigour. Cutting height is one factor that […]
General Guidelines for Scouting Alfalfa
Scouting is an important part of growing quality forage. Just like other field crops, scouting alfalfa helps growers stay ahead of emerging problems, correctly time harvests, and make better decisions when planning future crops. Plant counts should be done spring and fall (Table 1). These can be done when the alfalfa is dormant. The spring […]
May 2018 Forage Report
Southwestern: Most alfalfa stands overwintered well; however those on heavy soils and in low-lying areas may have suffered winter injury. New seedings and annual forage acres are expected to increase this year in response to weather conditions over 2016 and 2017. As of May 27th, alfalfa weevils had reached 1st instar. Scouting is advised to identify […]
Risk of Alfalfa Winterkill in 2018
Many fields across Ontario may be at risk of alfalfa winter kill this year. This post contains links to OMAFRA resources that can help you determine whether your fields were at risk, if damage occurred, and what to consider for next steps. Late cutting can increase risk Due to rain delays, some fields were cut during […]