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Jojoba Oil

Jojoba oil is a vegetable oil obtained from the jojoba bean. The physical properties of jojoba oil are similar to those of other vegetable oils. Jojoba has been found to be very effective and capable of controlling white flies and powdery mildew on ornamental plants and grapes. The ability of jojoba oil to remain stable even at high temperatures make it a widely usable fungicide in nearly all climatic conditions. The fungicide is applied by ground application like a spray containing a final concentration of ≤ 1% jojoba oil.

 

 

Target Pests: Whiteflies

Target Pathogens:  Powdery Mildew

Mode of action: It is used as a deterrent and to smother and kill insects. An additional mechanism of action is to form a physical barrier between an insect pest and the leaf surface.

Application Tips: Never to apply an oil spray within 2 weeks of a sulfur spray or plants may be injured. Some plants may be more sensitive than others, however, and the interval required between sulfur and oil sprays may be even longer; always consult the fungicide label for any special precautions. Also, oils should never be applied when temperatures are above 90°F or to drought-stressed plants.

Impact on Beneficial Insects:

  • Overall toxicity rating: Low
  • Specific impacts: predatory mites (Low), parasitoids (Low), general predators (Low)

References

Recent Trends in Studies on Botanical Fungicides in Agriculture. Plant Pathol J. 2013 Mar; 29(1): 1–9.

University of California Integrated Pest Management

Least Toxic Organic Pesticides for the Home Gardener OSU Extension Master Gardener™ Program p. 5