Nematodes against sedges
465 SEK
Unit price perEstimated delivery between 20 April and 27 April.
Nematodes to control grasshopper larvae in the lawn. For outdoor use. In packages of 50 million or 250 million.
Orders placed by Sunday evening will be shipped the following Tuesday.
In the case of problems with damage to the lawn caused by grasshopper larvae, nematodes are used as biological control. Nematodes are microscopic roundworms that are watered over the area you want to treat. They are sold in packages of 50 million or 250 million nematodes, where the smaller one is enough to treat 50-100 m² of area and the larger one to 300-500 m². .
Marsh thorn, Tipula paludosa, is common in Sweden. The adults hatch at the end of July and swarm on the lawn until about mid-September. During this period, egg laying takes place. Each female can lay 300-400 eggs in the grass. The eggs hatch about 14 days after they are laid, i.e. in August-September. The young larvae then crawl under the roots of the grass plants, where they begin to gnaw on fresh root tips. The larvae overwinter in the soil and usually do not cause visible damage until the following spring. Then they grow large, to a length of 3-4 cm, and have a very high need for food.
The infestation is recognized by the grass dying or not having time to grow back. By examining the grass roots, you can detect a fringed gnaw there. In case of heavy infestations in the spring, gnaws can also appear on the leaves. Often, the infestation is also visible when birds discover the larvae and systematically start turning the grass over with their beaks to get to them and eat them.
When the nematodes are watered into the soil, they actively search for a suitable host in the form of a sedge caterpillar. They penetrate it and infect it. Bacteria from the nematodes kill the caterpillar. The nematodes multiply inside the infected caterpillar, and then leave it to search for new larvae.
Treatment times
Plan your first treatment approximately 2-3 weeks after your flight. of adult harriers have been observed over the grass (=egg laying), this is usually in August/September .
Nematodes can mainly control the small, newly hatched larval stages of the hogweed. Since nematodes also depend on soil heat to work, they are most effective for a short period. This is in the fall, until early September.
The following spring, the larvae are often too large for the nematodes to effectively control them. Treatment can also be carried out in the spring at soil temperatures above 8°C, but then a reduced effect can be expected.
User manual
The contents of the bag are dissolved in water while stirring, and then watered over the surface. Use the solution with the nematodes immediately after mixing.
Use the nematodes only during the appropriate treatment period to achieve an effective result. The treatment is mainly effective against the smaller larval stages of the sedge weevil. Optimal soil temperature is above 12 degrees for four weeks after treatment to ensure that the nematodes are active. At lower temperatures, or larger larval stages, a reduced effect can be expected.
As the nematodes live in the water film between the soil particles, it is important that the soil is kept moist during treatment. If the treatment surface is dry, it is watered preventively before treatment. Also water after treatment to thoroughly rinse the nematodes into the soil. The surface should then be kept moist for at least two weeks after treatment.
Treatment should not be carried out during heavy rain as there is a risk of washing away the nematodes.
The nematodes should be watered out early in the morning, in the evening or on a cloudy day, as they are sensitive to UV light.
Tip!
For easier deployment, please use a nematode dewaterer !
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Nematodes against sedges
465 SEK
Unit price perExpected delivery date: 20 April to 27 April.
Applies to orders within Sweden. For other countries - see our delivery terms .
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Nematodes to control grasshopper larvae in the lawn. For outdoor use. In packages of 50 million or 250 million.
Orders placed by Sunday evening will be shipped the following Tuesday.
In the case of problems with damage to the lawn caused by grasshopper larvae, nematodes are used as biological control. Nematodes are microscopic roundworms that are watered over the area you want to treat. They are sold in packages of 50 million or 250 million nematodes, where the smaller one is enough to treat 50-100 m² of area and the larger one to 300-500 m². .
Marsh thorn, Tipula paludosa, is common in Sweden. The adults hatch at the end of July and swarm on the lawn until about mid-September. During this period, egg laying takes place. Each female can lay 300-400 eggs in the grass. The eggs hatch about 14 days after they are laid, i.e. in August-September. The young larvae then crawl under the roots of the grass plants, where they begin to gnaw on fresh root tips. The larvae overwinter in the soil and usually do not cause visible damage until the following spring. Then they grow large, to a length of 3-4 cm, and have a very high need for food.
The infestation is recognized by the grass dying or not having time to grow back. By examining the grass roots, you can detect a fringed gnaw there. In case of heavy infestations in the spring, gnaws can also appear on the leaves. Often, the infestation is also visible when birds discover the larvae and systematically start turning the grass over with their beaks to get to them and eat them.
When the nematodes are watered into the soil, they actively search for a suitable host in the form of a sedge caterpillar. They penetrate it and infect it. Bacteria from the nematodes kill the caterpillar. The nematodes multiply inside the infected caterpillar, and then leave it to search for new larvae.
Treatment times
Plan your first treatment approximately 2-3 weeks after your flight. of adult harriers have been observed over the grass (=egg laying), this is usually in August/September .
Nematodes can mainly control the small, newly hatched larval stages of the hogweed. Since nematodes also depend on soil heat to work, they are most effective for a short period. This is in the fall, until early September.
The following spring, the larvae are often too large for the nematodes to effectively control them. Treatment can also be carried out in the spring at soil temperatures above 8°C, but then a reduced effect can be expected.
User manual
The contents of the bag are dissolved in water while stirring, and then watered over the surface. Use the solution with the nematodes immediately after mixing.
Use the nematodes only during the appropriate treatment period to achieve an effective result. The treatment is mainly effective against the smaller larval stages of the sedge weevil. Optimal soil temperature is above 12 degrees for four weeks after treatment to ensure that the nematodes are active. At lower temperatures, or larger larval stages, a reduced effect can be expected.
As the nematodes live in the water film between the soil particles, it is important that the soil is kept moist during treatment. If the treatment surface is dry, it is watered preventively before treatment. Also water after treatment to thoroughly rinse the nematodes into the soil. The surface should then be kept moist for at least two weeks after treatment.
Treatment should not be carried out during heavy rain as there is a risk of washing away the nematodes.
The nematodes should be watered out early in the morning, in the evening or on a cloudy day, as they are sensitive to UV light.
Tip!
For easier deployment, please use a nematode dewaterer !
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