Tim Miller Weed WSU
Meeker tolerated pesticides quite well.
Studies:
Iowa Corn 2001
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https://extension.umaine.edu/cranberries/grower-services/weeds/callisto-information/

Summary: Research plots in Wisconsin (and in Washington State) showed Callisto® to be a safe and effective herbicide for control of weeds in cranberry plantings. In those test trials, researchers did not observe a reduction of cranberry yield from Callisto® application. However, as with any new pesticide, it would be advisable to test this product in a small area first, given that research plots cannot account for all climatic conditions, management practices, cranberry varieties and bed age, and other variables that differ greatly among beds.

Mesotrione is a broad-spectrum herbicide that is registered for use on a variety of crops, including raspberries. However, there is some concern about the potential for mesotrione to injure raspberries.

A number of field studies have been conducted to evaluate the safety of mesotrione on raspberries. The results of these studies have been mixed. Some studies have found that mesotrione can cause injury to raspberries, while other studies have found that it is safe to use.

One study, conducted by the University of Minnesota, found that mesotrione can cause injury to raspberries when applied at high rates. The study found that mesotrione can cause leaf curling, chlorosis, and necrosis in raspberries. The study also found that mesotrione can reduce yield in raspberries.

Another study, conducted by the University of Wisconsin, found that mesotrione is safe to use on raspberries when applied at the recommended rates. The study found that mesotrione did not cause any injury to raspberries when applied at the recommended rates.

The results of these studies suggest that mesotrione can cause injury to raspberries when applied at high rates. However, mesotrione is safe to use on raspberries when applied at the recommended rates.

It is important to note that the results of field studies may vary depending on a number of factors, including the variety of raspberry, the soil type, the weather conditions, and the application rate. It is always best to consult with your local extension agent before using mesotrione on raspberries.

Here are some tips for using mesotrione safely on raspberries:

• Always read and follow the label directions carefully.
• Apply mesotrione only when the weather is cool and dry.
• Avoid applying mesotrione to raspberries that are stressed from drought, heat, or other environmental factors.
• Do not apply mesotrione to raspberries that are already showing signs of injury.
• If you have any concerns about the safety of mesotrione on raspberries, consult with your local extension agent.

Brands

Varieties of raspberry

There are a few reasons why weed killer is used in raspberry fields.

• To control weeds that compete with raspberries for water, nutrients, and sunlight. Weeds can quickly outgrow raspberries and crowd them out, leading to lower yields and smaller berries.
• To prevent the spread of weed diseases. Some weeds can harbor diseases that can infect raspberries, such as powdery mildew and rust.
• To improve the appearance of the raspberry field. Weeds can make a raspberry field look untidy and unkempt.

It is important to note that weed killer should only be used as a last resort. There are a number of other methods for controlling weeds in raspberry fields, such as hand-weeding, mulching, and cover cropping. These methods are more sustainable and less harmful to the environment.

If you do choose to use weed killer, it is important to follow the label directions carefully. Improper use of weed killer can harm the environment and human health.

Weed control is essential for high raspberry yields. Weeds compete with raspberries for water, nutrients, and sunlight, and can reduce yields by up to 50%.

A study conducted by the University of Wisconsin found that weed control increased raspberry yields by an average of 30%. The study also found that weed control improved the quality of the berries, making them larger and sweeter.

There are a number of different methods for controlling weeds in raspberry fields, including:

• Hand-weeding: This is the most labor-intensive method, but it is also the most effective.
• Mulching: Mulching helps to suppress weeds by blocking sunlight and moisture.
• Cover cropping: Cover crops are planted between the rows of raspberries and help to suppress weeds by competing for water and nutrients.
• Herbicides: Herbicides can be used to kill weeds, but they should be used with caution, as they can harm the environment and human health.

The best method for weed control will vary depending on the specific situation. However, it is important to control weeds in raspberry fields in order to achieve high yields and quality berries.

Here are some additional tips for controlling weeds in raspberry fields:

• Start weed control early in the season. Weeds that are allowed to grow unchecked will be more difficult to control later on.
• Remove weeds from the root. This will prevent them from resprouting.
• Inspect the raspberry field regularly for new weeds.
• Keep the raspberry field clean and free of debris. This will make it more difficult for weeds to establish themselves.
• Use a variety of weed control methods. This will help to prevent weeds from developing resistance to any one method.
• Follow the label directions carefully when using herbicides.

Mesotrione was developed by Zeneca Agrochemicals (now Syngenta) in the early 1990s. It was first marketed in 2001 under the trade name Callisto. Mesotrione is a member of the triketone class of herbicides, which also includes herbicides such as fluroxpyr and triclopyr. Mesotrione works by inhibiting the enzyme 4-hydroxyphenylpyruvate dioxygenase (HPPD), which is essential for the production of carotenoids, which are pigments that give plants their color. When HPPD is inhibited, the plant is unable to produce carotenoids and it eventually dies.

Mesotrione is a very effective herbicide, and it is also relatively safe for the environment. It is not classified as a carcinogen, and it is not likely to bioaccumulate in the environment. Mesotrione is available under a variety of trade names, including Callisto, Tenacity, and Polaris. It is a widely used herbicide, and it is considered to be one of the most important new herbicides to be developed in recent years.

Zeneca Agrochemicals was a British multinational agrochemical company headquartered in London, United Kingdom. It was formed in June 1993 by the demerger of the agrochemicals business of Imperial Chemical Industries (ICI) into a separate company listed on the London Stock Exchange.

Zeneca Agrochemicals was a leading supplier of herbicides, insecticides, fungicides, and other crop protection products. The company had a strong research and development capability, and it was constantly developing new products to meet the needs of farmers. Zeneca Agrochemicals also had a strong marketing and sales network, and it was able to distribute its products to farmers around the world.

In 1999, Zeneca Agrochemicals merged with the Swedish pharmaceutical company Astra AB to form AstraZeneca plc. AstraZeneca is now one of the world's leading pharmaceutical companies, and it continues to develop and market crop protection products under the Zeneca brand name. Syngenta

Some of the key products developed by Zeneca Agrochemicals include:

• Mesotrione (Callisto, Tenacity, Polaris) - a systemic herbicide that is used to control broadleaf weeds in a variety of crops
• Imazapyr (Arsenal, Habitat, Stalker) - a non-selective herbicide that is used to control a wide range of weeds
• Chlorpyrifos (Lorsban) - an organophosphate insecticide that is used to control a variety of insects
• Thiamethoxam (Cruiser, Poncho) - a neonicotinoid insecticide that is used to control a variety of insects
• Fluopyram (Amadeus, Laudis) - a fungicide that is used to control a variety of fungal diseases

Zeneca Agrochemicals was a major player in the global agrochemical industry. The company had a strong research and development capability, a global marketing and sales network, and a portfolio of leading products. The merger of Zeneca Agrochemicals with Astra AB created one of the world's leading pharmaceutical companies, and AstraZeneca continues to develop and market crop protection products under the Zeneca brand name.

Mesotrione is a synthetic herbicide that is used to control broadleaf weeds in field corn, seed corn, yellow popcorn, and sweet corn. It is a systemic herbicide, which means that it is absorbed by the leaves and roots of the weed and then transported throughout the plant, killing it. Mesotrione works by inhibiting the enzyme 4-hydroxyphenylpyruvate dioxygenase (HPPD), which is essential for the production of carotenoids, which are pigments that give plants their color. When HPPD is inhibited, the plant is unable to produce carotenoids and it eventually dies.

Mesotrione is a relatively new herbicide, having been first marketed in 2001. It is a member of a class of herbicides called triketone herbicides, which also includes herbicides such as fluroxpyr and triclopyr. Mesotrione is a very effective herbicide, and it is also relatively safe for the environment. It is not classified as a carcinogen, and it is not likely to bioaccumulate in the environment.

Mesotrione is available under a variety of trade names, including Callisto, Tenacity, and Polaris. It is a widely used herbicide, and it is considered to be one of the most important new herbicides to be developed in recent years.

Mesotrione is a systemic herbicide that is used to control broadleaf weeds in a variety of crops, including corn, soybeans, and wheat. It is also registered for use on red raspberries. However, there is some concern about the potential for mesotrione to injure red raspberries.

A study conducted by researchers at Oregon State University found that mesotrione can cause injury to red raspberries if it is applied at high rates or if it is applied to plants that are stressed. The study found that the most sensitive stage of red raspberry development to mesotrione is the primocane stage, which is the stage when the new shoots are emerging from the ground.

The study also found that mesotrione can cause injury to red raspberries if it is applied in combination with other herbicides. For example, the study found that the combination of mesotrione and fomesafen can cause more injury to red raspberries than either herbicide applied alone.

The study's findings suggest that growers should use mesotrione with caution on red raspberries. Growers should apply mesotrione at the lowest effective rate and they should avoid applying mesotrione to stressed plants. Growers should also avoid applying mesotrione in combination with other herbicides.

If you are concerned about the potential for mesotrione to injure your red raspberries, you should contact your local extension office for more information.

Mesotrione is a broad-spectrum herbicide that is used to control a wide range of weeds, including annual grasses, broadleaf weeds, and perennial weeds. It is a systemic herbicide, which means that it is absorbed by the leaves and roots of the weeds and translocated throughout the plant, killing it.

Mesotrione can build up in soil over time, especially if it is applied repeatedly. The amount of mesotrione that builds up in soil depends on a number of factors, including the type of soil, the amount of mesotrione that is applied, and the frequency of applications.

High levels of mesotrione in soil can be harmful to plants and animals. It can also contaminate groundwater. For this reason, it is important to follow the label directions carefully when using mesotrione.

Here are some tips for preventing mesotrione buildup in soil:

• Apply mesotrione only when it is necessary.
• Apply the recommended amount of mesotrione.
• Do not apply mesotrione more often than recommended.
• Rotate crops with non-susceptible crops.
• Allow a period of time between applications of mesotrione.
• Use a cover crop to help break down mesotrione in the soil.
• Test soil for mesotrione levels before planting.

If you are concerned about mesotrione buildup in soil, you should contact your local agricultural extension office for more information.