Caterpillar. Detection and treatments

In cannabis crops (both outdoor and greenhouse), we are very likely to encounter an insect pest, such as caterpillars:

Caterpillars belong to the Lepidoptera family, and in cannabis, we can find several types of caterpillars, of different colours and sizes.

At the end of the summer, the caterpillars (or larvae) hatch from the eggs previously laid by the butterfly, generally on the highest parts of the plant and leaves closest to the flowers. The leaves that host the eggs will be the first food for the larvae/ caterpillars once they hatch.

We should analyze the plant, paying special attention to the flowering stages, since the caterpillars will have already hatched and will begin to devour the crop.

Once the Lepidoptera is detected, we will treat the plant with Bacillus Thuringensis, always at low light hours.

Bacillus Thuringensis acts by destroying the digestive system of the caterpillar once it ingests it. Within 24 hours the caterpillar will have stopped feeding and therefore will no longer be a risk to the plant. It is important to repeat the treatment once or twice every 10-15 days, depending on the severity.

For more information about Lepidoptera and treatments against caterpillars consult the Alchimia web.