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MYTH

Soil drenches and granular pesticides are effective to use anywhere as long as they are labeled for palms.

A single crown spray application will provide long-term protection.

Organic products are always safer and less toxic than injection treatments.

Neem oil is an effective primary control for Coconut Rhinocerous Beetle (CRB).

Do you have questions or want to learn more about CRB?

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FACT

Soil drenches and granular pesticides have less than 30% uptake into treated plants and cannot be used near bodies of water due to leaching risks. (CRB Hawaii, 2023)

Crown sprays are short-residual contact killers prone to wind drift onto off-target plants and degrade quickly, requiring weekly re-applications.
(CRB Hawaii, 2023)

Many organic products carry higher toxicity ratings than systemic injections used for CRB management (Hawaiʻi Invasive Species Council, n.d.)

University of Hawaiʻi tests show neem oil does not significantly reduce CRB larvae or adult survival. Neem oil is ineffective as a primary control measure and should not replace proven management methods. (Cheng & Melzer, 2019)