Cleome monophylla essential oil and its constituents as tick (Rhipicephalus appendiculatus) and maize weevil (Sitophilus zeamais) repellents

Abstract

The repellency of the essential oil of the shrub Cleome monophylla (Family: Capparidaceae) and identified constituents of the oil were evaluated against the livestock tick, Rhipicephalus appendiculatus and the maize weevil, Sitophillus zeamais. In a tick climbing repellency bioassay, the oil of C. monophylla exhibited repellency which, at the highest dose, was comparable to that of the commercial arthropod repellent N, N‐diethyl toluamide (DEET). In a Y‐tube olfactometer bioassay, C. monophylla oil showed higher or comparable repellency against S. zeamais relative to DEET at all the doses tested. 14 Compounds were identified in the C. monophylla oil by GC, GC‐MS and coinjection with authentic samples. Terpenolene was found to occur in largest quantity (14%) followed by 1‐α‐terpeneol (10%), pentacosane (9%), (α + β)‐humulene (8%), phytol (5%) and 2‐dodecanone (4%). The most repellent components against R. appendiculatus and S. zeamais were 1‐α‐terpeneol and 2‐dodecanone. The overall pattern of repellency activity of the C. monophylla constituents with respect to the two arthropods was, however, different. The potential of C. monophylla in tick and maize weevil control is discussed.

Larvicidal Activity of Essential Oils From Brazilian Croton Species Against Aedes Aegypti L

“…However, products from this plant species can cause detrimental effects on natural enemies in storage environments (Sanon et al 2011), thus requiring caution when used as grain protectants. In addition, other plant species of the Cleome genus showed repellent actions against ticks (Parasitiformes) and insects (Ndungu et al 1995;Nyalala & Grout 2007), but the present study is the first to report on the insecticidal/repellent potential against C. spinosa.…”

Repellency property of long chain aliphatic methyl ketones against <i>Anopheles gambiae</i> s.s

“…Previous studies of long chain aliphatic methyl ketones showed repellence to arthropods, including blood sucking insects (Ndungu et al, 1995;Blum, 1966;Torr et al, 1996;Barton, 2003;Roe, 2004;Gikonyo et al, 2002;). For example, repellency activities of 2-decanone, 2-undecanone and 2-dodecanone to Glossina morsitans morsitans have been recorded in wind tunnel experiments (Gikonyo et al, 2003).…”

Antiectoparasitic activity of the gum resin, gum haggar, from the East African plant, Commiphora holtziana

“…The use of African plant oils and resins to control tick pests through repellency, immobilization or acaricidal activity has been studied elsewhere. The essential oil of molasses grass, Melinis minutiflora, has been shown to repel the brown-ear tick, Rhipicephalus appendiculatus (Mwangi et al, 1995), as has the essential oil of the shrub, Cleome monophylla (Ndungu et al, 1995), Ce. hirta , and the East African shrub, Gynandropsis gynandra .…”