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BTK Insecticide for Caterpillars

  • $1400

Caterpillars are a huge problem in Alberta! They can defoliate trees and destroy your garden in a matter of days. Even though you may not see the caterpillars themselves, evidence can be found in the form of droppings and foliar damage.

Cabbage worms are green and like to hide on the underside of leaves. They especially like to prey on leafy greens like lettuce, kale and cabbage, and have been known to destroy young cauliflower plants before they have a chance to flower. It is important that you identify a cabbage worm infestation immediately.

There are two main varieties of tent caterpillar currently found in Alberta:

Forest tent caterpillars, the blue variety of tent caterpillar, defoliated 4.8 million hectares of Canadian forest in 2015.

If you find an actual tent in a tree, that tent is most likely to belong to the Eastern tent caterpillar, which are black and orange. These caterpillars cause less damage than the forest tent caterpillar, but are unsightly.

Gypsy moths are often confused with tent caterpillars. They are considered an invasive species and a very serious pest and steps should be taken to eliminate them as soon as they're spotted.

"I will destroy everything you've worked so hard to grow!"

Safer's BTK Caterpillar Killer is a biological insecticide that controls caterpillars including cabbage worm, tomato hornworm, tent caterpillars, gypsy moth, leafrollers, and other listed insects. Simply mix the concentrate with water and spray on vegetables, fruit, trees, and ornamentals. After ingesting the treated portion of the leaf, caterpillars stop feeding within hours and die within a few days. This 100mL concentrate makes 33.3L of solution.

tent caterpillar egg sack
eastern tent caterpillars are common in calgarywhat does tent caterpillar web look like

  • Controls caterpillars including cabbage worm, tomato hornworm, tent caterpillars, gypsy moth, leafrollers, and other listed insects
  • Can be used on vegetables, fruit, trees, and ornamentals
  • Active Ingredient: Bacillus thuringiensis subsp. kurstaki, strain ABTS-51
  • Makes 33.3L
  • BTK is generally regarded as environmentally safe, as its toxicity is essentially limited to its target pest; humans, wildlife, and beneficial insects are regarded as unaffected by the pesticide. This means that you'll only be killing pesky caterpillars, not your bee friends!

Cabbage Loopers

Identification: These bright green or turquoise inchworm-like caterpillars are typically found on the undersides of your leaves. They are well camouflaged. Leaves may appear weighted-down.
Control: Pyrethrins, insecticidal soap, yellow sticky traps, diatomaceous earth, hand-picking.
Biological Control: BTK
Notes: Caterpillars are typically only a problem on outdoor grows. They must be dealt with swiftly, as they can devour your entire crop in a matter of days. Plants such as lettuce, Swiss chard, cabbage and cauliflower are magnets for cabbage loopers. Kill any moths that enter your grow room. 

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