Best Choice For Weevil Control In Cool Climates!
This species of beneficial nematode, Steinernema kraussei, is unique for a couple of reasons but most importantly because they are effective at lower temperatures than most other beneficial nematodes. They are effective between 41° and 86° F and continue to parasitize pests at temperatures as low as 37° F. Note that above about 86° F, they begin to lose efficacy.
Use S. kraussei to Control:
- Weevil larvae, especially Vine weevil larvae (Otiorhynchus sulcatus).
- Filbertworm (Cydia latiferreana)
- Sawfly weevils
- Other soil dwelling pest insects (Univ of Hertfordshire).
They are a mobile nematode with behavior similar to
Heterorhabditis bacteriaphora.
Steinernema kraussei nematodes reduce the population of black vine weevil by infecting and killing immature stages that cause damage to both greenhouses and nursery plants. They use the bacterium
Xenorhabdus nematophilus to infect their prey.
Shelf Life: 14 days after delivery (refrigerated and unopened in original container). Once opened, use entire container within the same day.
How Much Do I Need? Order enough to treat the full infested area. Quantities and treatment areas are approximate.
| Quantity |
Treatment Area |
Shipping Method |
| 5 million |
≈100 sq. ft. |
2nd Day |
| 10 million |
≈200 sq. ft. |
2nd Day |
| 50 million |
≈1,000 sq. ft. |
2nd Day |
| 250 million |
≈5,000 sq. ft. |
Next Day |
| 500 million |
≈10,000 sq. ft. |
Next Day |
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This Product Controls These Pests or Diseases: Various species of vine weevil larvae including Black Vine Weevil, Sawfly Weevils and Filbertworm
If you are a first time user of beneficial nematodes, please follow the illustrated application instructions for use with a hose end sprayer. If you have questions, please call us at 1-800-827-2847.
For most applications, beneficial nematodes should be mixed with water and sprayed directly into the soil. Hose-end sprayers and pump sprayers work best, but nematodes can also be applied with a watering can, through irrigation and fertigation systems, into certain hydroponics media, and by syringe injection.
What's The Application Rate?
The exact mix rate varies based on the type of sprayer used and the user's speed of movement through the area. The key is to spread the nematode solution as evenly as possible over the full area being treated. We recommend spraying down the area with just water using the sprayer for application to determine roughly how many tanks will be needed for full coverage.
When Should They Be Applied?
- Apply when soil temperatures are above 42°F.
- Apply early in the morning or predusk when temperatures are cooler and the sun is not so bright.
It is best to make at least two applications, separated by 7-10 days to stagger the life cycles of the nematodes and ensure complete coverage. In cases of severe infestations, applications should be made every 7-10 days or until infestation subsides.
Can I Keep Nematodes In Water Until I Apply Them?
Only mix up what you are going to apply at that time. While some nematodes are aquatic, insect-parasitic nematodes are not. Do not leave the nematode/water mixture sitting for more than 2 hours as death can occur. Please call us at 1-800-827-2847 if you have questions about using nematodes in hydroponic environments. For best results, always apply beneficial nematodes as soon as possible after mixing.
How Long Can Nematodes Be Kept Before Use?
Beneficial Nematodes should be used as soon as possible. Because they are living organisms it is best to store them unopened for no longer than 2 weeks in a refrigerator. DO NOT FREEZE. Once opened, use entire container within the same day.
Should The Soil Be Moist After The Nematode Application?
The soil should be moist at time of application and lightly watered immediately after application. After application, check the application area regularly and water as needed to maintain soil moisture. Generally speaking, water every 3-4 days if rainfall does not occur.
How Long Does It Take To See Results?
After application, the nematodes locate pests and enter the pests through body openings or through the body wall. This may take 7-10 days. Once inside, the nematodes inject bacteria that kill the pest insect within 48-72 hours by causing blood poisoning. Maximum control occurs over 2-4 weeks.
How Often Should Nematodes Be Applied?
Nematodes are recommended for use whenever larvae or grubs are present. Generally, this is during the spring and fall months. Because larvae feed on plant roots, beneath the soil surface, severe damage can be done before realizing there is a problem. Look for signs of an adult insect, such as leaf-notching. If adult insects are present, their eggs will be hatching soon. Keep in mind, one application may not eradicate a population of insects that has become established over a period of years.
Will Nematodes Live Through The Winter?
In general, harsh winter weather in most parts of the country guarantees a significant decline in the population of the nematodes. In most cases, nematodes (just like insects) will become dormant during cold weather. Any survivors would be few in number to provide adequate insect control. If your insect pest returns the following year, another application may be necessary.
When Nematodes Are Applied To One Area Will They Move To Other Areas?
Nematodes are microscopic in size and have limited range of horizontal movement. They move vertically into the soil until they find a pest to infect. As a result, thorough coverage of the area is important for achieving control.
Warranty:
ARBICO Organics guarantees live delivery of product. ARBICO Organics makes no guarantee of effectiveness due to disparities during application. Please call within 24 hours of receipt with any questions or concerns.
