Updated: July 20, 2023

Introduction

Lerps are small, scale-like insects that can infest marijuana plants and cause significant damage if left unchecked. They are commonly found on the underside of leaves and can be identified by the small, white or yellowish bumps they create. Lerps feed on plant sap, which weakens the marijuana plant and hampers its growth. It is essential to address lerp infestations promptly to protect the health and vitality of your marijuana plants. In this article, we will explore various methods to get rid of lerps effectively.

1. Manual Removal

One of the simplest and most effective ways to eliminate lerps from your marijuana plants is through manual removal. Using a pair of tweezers or your fingers, carefully scrape off the lerps from the leaves. Be gentle to avoid damaging the plant. Once removed, place the affected leaves in a sealed bag and dispose of them properly to prevent reinfestation.

2. Pruning Infested Areas

If the lerp infestation is severe or widespread, pruning may be necessary. Inspect your marijuana plant for heavily infested branches or leaves and trim them off using sterilized pruning shears or scissors. This will not only remove the lerps but also prevent them from spreading to other parts of the plant. After pruning, dispose of the infested plant material properly.

3. Natural Predators

Introducing natural predators can be an effective method for controlling lerp populations on marijuana plants. Ladybugs, lacewings, and parasitic wasps are natural enemies of lerps and can help keep their numbers in check. You can attract these beneficial insects to your garden by planting flowers such as marigolds or installing insectary plants nearby. These plants provide nectar and pollen, attracting natural predators that will prey on the lerps.

4. Neem Oil

Neem oil is a popular organic insecticide that can be used to control lerp infestations on marijuana plants. It contains azadirachtin, a compound that disrupts the feeding and reproduction of insects. Dilute neem oil according to the manufacturer’s instructions and apply it to the affected parts of the plant, making sure to coat the leaves thoroughly. Repeat the application every seven to ten days until the lerps are eliminated.

5. Insecticidal Soap

Another effective organic solution for lerp control is insecticidal soap. This natural pesticide works by suffocating the insects and disrupting their cell membranes. Mix an appropriate amount of insecticidal soap with water as per the instructions and spray it directly onto the affected areas of the marijuana plant. Ensure complete coverage, including the undersides of leaves where lerps often hide. Repeat the application every five to seven days until the infestation is under control.

6. Horticultural Oil

Horticultural oils, such as mineral oil or petroleum-based oils, can also be used to combat lerps on marijuana plants. These oils work by smothering the insects and preventing them from breathing properly. Mix the horticultural oil with water according to the manufacturer’s directions and spray it evenly on the affected parts of the plant. Take caution while using horticultural oils in high temperatures or under direct sunlight as they can cause leaf damage.

7. Systemic Insecticides

If all other methods fail, systemic insecticides can be used as a last resort for severe lerp infestations. These insecticides are absorbed by the marijuana plant and transported throughout its tissues, effectively targeting pests that feed on its sap, including lerps. It is crucial to choose a systemic insecticide labeled for use on marijuana plants and follow the instructions carefully to minimize any potential harm to beneficial insects or human health.

Conclusion

Lerps can be a nuisance for marijuana growers, but with timely and appropriate action, they can be effectively controlled. Manual removal, pruning, and the use of natural predators are non-toxic methods that can help reduce lerp populations. Organic insecticides such as neem oil, insecticidal soap, and horticultural oils are also valuable tools in combating lerps. However, if the infestation persists or becomes severe, systemic insecticides can be considered as a last resort. Remember to always follow label instructions and consider the potential impact on beneficial insects and the environment when choosing a control method. By being vigilant and proactive, you can protect your marijuana plants from the damaging effects of lerps and ensure a healthy harvest.