Plant Essential Oils as Arrestants and Repellents for Neonate Larvae of the Codling Moth (Lepidoptera: Tortricidae)

Artemisia annuaextracts, artemisinin and 1,8-cineole, prevent fruit infestation by a major, cosmopolitan pest of apples

“…In their experiments (Tripathi et al, 2001), feeding deterrence indexes for the larvae fed flour wafers treated with 100-120 mg/ml 1,8-cineole varied between 50 and 70. Our results from the experiment with 1,8-cineole also corroborate with previously published results of Landolt et al (1999), who showed arresting and repellent effects of essential oil from eucalyptus, Eucalyptus globulus (Labille) (Myrtaceae), against codling moth neonates. However, considering that 1,8-cineole exhibits low deterrence against codling moth neonates and is present at 3% or lower concentration in our crude A. annua extracts we think that this compound may only slightly contribute to overall deterring properties of this plant.…”

Effect of plant essential oils on mortality of the stem nematode (Ditylenchus dipsaci)

“…In addition to thymol, this essential oil contains carvacrol (at 7%), another strong nematicidal compound (Oka et al 2000). Many components of the essential oils that revealed nematicidal activity, such as carvacrol, thymol, carvone, limonene, Artemisia ketone, and t-anathole, have also been reported for their biocidal effect on insects, fungi, bacteria and weeds (Kurita et al 1981;Janssen et al 1987;Muller-Riebau et al 1995;Landolt et al 1999;Isman 2000;Rodriguez-Kabana & Simmons 2005). Therefore, soil treatment with essential oils could have a potential for soil disinfestation as an alternative to chemicals.…”

Intercropping of lettuce and onion controls caterpillar thread, Agrotis ípsilon major insect pest of lettuce

“…Volatile compounds produced by non-host plants repelled the insect pest, drill logs and even attracted the female parasitoid C. sesamiea. Landolt et al [6] tested 27 essential oil extracts from 27 plants as a protective barrier against moth in fruit, and these consisted that the most effective repellents are garlic, Allium sativum L, Pogostemom cablin (Blanco) and Tanacetum vulgare L. These results suggest that the plant or plant oils may be used as a barrier against the fruit moth.…”