# Effects of garlic oil on tomato-potato psyllid

- Link: https://rd2.co.nz/trial/effects-of-garlic-oil-on-tomato-potato-psyllid/
- Published: 2019-09-07T23:54:53+00:00
- Author: rsf_admin

> Garlic oil significantly reduced TPP nymph populations.

Tomato-potato psyllid (Bactericera cockerelli) (TPP) is a vector for Candidatus 
Liberibacter solanacearum (CLso), a bacterium responsible for causing zebra chip(
ZC), a mottled browning discolouration of cooked potato crisps.

Organic gardeners have long relied on garlic as part of their pest-control arsenal.
Garlic contains sulphur, which, besides being toxic to pests, is also an antibacterial
and antifungal agent. BioRepel® (JH Biotech, Inc.) is a natural insect repellent
made from garlic oil (10% garlic oil).

BioRepel® has been reported to repel several plant insect pests including aphids,
leafhoppers, whiteflies and thrips.

A field trial, conducted at Pukekohe to determine the effects of foliar applications
of BioRepel® garlic oil on TPP nymphs in potato foliage, found that garlic oil significantly
reduced TPP nymph populations. Copyright © 2013 New Zealand Plant Protection Society(
Inc.).

[Read abstract here.](https://rd2.co.nz/wp-content/uploads/2018/03/NZ-Plant-Protection-Society-Tomato-Potato-Psyllid-pdf.pdf)