Determining When to Use Pesticides

Nov 18, 2022

By Chip East and Sonja Thomas

Pesticides can help in crop production, however, people need to understand when to use and when not to use pesticides. The correct use of pesticides begins long before people use a treatment for a pest. Often times a crop has already been destroyed, or managing a secondary pest will not help the main crop, and pesticides are not needed.

Pest Categories

Before attempting to manage a pest, make sure you have correctly identified the cause of the problem. Often times, people see the large or showy secondary pest on a plant and do not see the tiny primary pest. Before taking any action, it is important to correctly identify the primary pest that is causing the problem and become familiar with its life cycle and habits. Misidentification can cost time and money. The major pest categories include the following:

weeds
invertebrates
vertebrates
plant diseases

Weeds can be defined simply as a plant that is out of place. Invertebrates include insects, spiders, mites, snails, and slugs. Vertebrates include birds, snakes, and rodents. Plant diseases include fungi, bacteria, and viruses. Professionals use the word pesticide to describe products used to manage pests. The common pesticides are insecticides, fungicides, and herbicides, but many other pesticides are available.

Integrated Pest Management

Integrated Pest Management (IPM) is using a combination of methods to manage pests. These methods may include host resistance, biological, cultural, mechanical, sanitation, and chemical management strategies.

Host resistance is probably one of the easier methods for managing pests. It does not work in all cases, but some varieties are more resistant to certain pests. Some examples could be planting a tomato-spotted-wilt-resistant tomato, a scab-resistant pecan, or virus-resistant squash.
One insect feeding on another insect–such as a lacewing feeding on an aphid–is an example of biological control. A pesticide applicator needs to think about the harm to beneficial insects before applying pesticides.
Cultural practices include a change in the environment. Examples of cultural practices include changing a planting date, changing a fertilization practice, crop rotation, cultivation, mowing, mulching, and irrigation.
Mechanical control involves the use of traps, barriers, lights, electricity, etc.
A good sanitation practice could be removing the food, water, or shelter of a pest.
Chemical control is a part of IPM, and in many cases is the one that costs the most money and requires the most time.

Economic Threshold

As part of pest management, a farm, turf, or landscape manager needs to think about the economic threshold and economic injury level. The economic threshold is the point where pest populations are high enough that some type of management is necessary to prevent economic loss. For some sites–such as a golf course, park, or ornamental garden–management may be necessary to prevent an aesthetic loss. Would you use chemical control if you had one weed in the field or one fire ant mound in the turf? What about 10 weeds? How about 15 fire ant mounds? Different sites may have a different economic threshold. Fifty weeds in a large vegetable field would not warrant any additional management, but someone may do something about the 50 weeds in a landscape. One fire ant mound in a lawn may not be a problem, however one mound on an athletic field would be managed as fast as possible.

Economic Injury Level

The economic injury level has been reached when the cost of treatment is not worth the return. It is not a good economic choice to spend more money on a crop than the crop is worth. A farmer needs to know where the economic threshold and economic injury level is before making management decisions.

Conclusion

Before using pesticides, practice IPM, determine if pesticides are the best choice, read the label carefully, and use safety precautions found on the label. Contact your your county’s Extension office for more information on the use of pesticides.

Source : aces.edu

Video: The FCDC and AgSmart Bring Plant Breeding to a Wider Audience

In the vast prairies of Alberta, Olds College’s Field Crop Development Centre (FCDC) stands as a beacon of innovation and research in the agricultural world. The institution has become a key player in advancing agricultural technologies and practices. The FCDC’s commitment to applied research has driven them to seek effective means of disseminating their findings and creating a positive impact on the farming community.

One such avenue that aligns with their mission is AgSmart, an event dedicated to showcasing cutting-edge agricultural technologies. The coming together of the FCDC’s annual Field Day and Ag Smart has proved to be a natural fit, fostering a synergy that benefits both parties and propels the agriculture industry forward. The FCDC Field Day took part in conjunction with AgSmart for the first time this week on Aug. 1-2 in Olds, Alta. FCDC Program Director Kofi Agblor and Olds College VP of Development Todd Ormann sat down for an interview with Marc Zienkiewicz to discuss the significance of the two events taking part together and what the future holds.

The Intersection of Research and Technology The essence of the FCDC lies in its dedication to plant breeding and new seed varieties, particularly barley and triticale. While conducting research is essential, it becomes meaningful when its benefits are shared with the wider community. This is where AgSmart steps in, providing a key venue for the FCDC to showcase their research. This union between research and technology creates a holistic and enriching experience for farmers, ranchers, and industry professionals, the pair said.

Seeds as Technology For the FCDC, the partnership with AgSmart goes beyond mere event collaboration. It is about creating an environment that bridges the gap between seeds and smart technology, Ormann said. The college believes that for technology to truly revolutionize agriculture, it must begin with a strong foundation — high-quality seeds. As the saying goes, “it all starts with a seed.” To demonstrate this critical aspect, the collaboration aims to showcase the seed value chain as an integral part of the smartphone.

The Birth of a Powerful Alliance The idea of joining forces emerged when staff realized the potential synergy between AgSmart and the FCDC Field Day. With just a few days separating the two events, a proposal was put forward to merge them. The marketing and communications teams from both sides worked seamlessly to ensure the essence of both events remained intact, creating a powerful alliance that leverages the strengths of each, Agblor said.

Driving Advancements in Breeding For Agblor, the partnership with AgSmart has tremendous potential to drive advancements in breeding and other technology. With technologies like drones and imaging becoming integral to phenotyping, breeding is no longer confined to vast fields to assess thousands of plants manually. Instead, it benefits from the data-rich insights brought about by smart technologies. These advancements make breeding more efficient, precise, and instrumental in shaping the future of agriculture.

Overcoming Challenges Together While the partnership between Olds College and Ag Smart has been a resounding success, there are challenges on the horizon. Securing stable funding for long-term breeding initiatives is crucial to sustain progress. The college is committed to navigating these challenges and investing in agriculture’s future sustainably, Agblor said.