Inhibition of oviposition by volatiles of certain plants and chemicals in the leafhopperAmrasca devastons (distant)

Abstract

Oviposition by the leafhopperAmrasca devastans (Distant) on its susceptible host plant, cotton (Gossypium hirsutum var. PS-10), was inhibited by the volatiles of certain plants and by the vapors of some chemicals occurring in various plants when these were presented at a distance from the ovipositional substrate. The effectiveness of the volatiles of the plants for inhibiting the oviposition decreased in the order: eucalyptus > coriander=castor=tomato > lime,Ocimum being without effect. Among the volatile plant chemicals tested, the inhibitory effects decreased in the order: citral=carvacrol > citronellol=farnesol = geraniol=eucalyptus oil > neem oil=Cymbopogan oil. These chemicals served as volatile antiovipositants and did not reduce the arrival/stay of the insects on the host plants. Carvacrol had a slight toxic effect on the nymphs, but none of the volatiles was toxic to the adults.

Artificially applied plant volatile organic compounds modify the behavior of a pest with no adverse effect on its natural enemies in the field

“…These compounds are common acyclic monoterpenes playing roles in plant-insect interaction, and their repellent effect on mosquitoes is well known (Kaufman et al 2010;Montefuscoli et al 2014). Their potential effect on agronomic insect pests remain, however, largely unexplored (Lee et al 1997;Saxena and Basit 1982), but essential oils containing these compound show some efficiency (Costa et al 2015;Olivero-Verbel et al 2010), and our results suggest they have potential also against D. radicum in the field.…”

“…This bicyclic monoterpene, commonly found in plants of the Myrtacea family, plays a major role in plant-microorganism (Steeghs et al 2004) and plant-insect interactions (Schiestl and Roubik 2003). It has been tested against mosquitoes (Klocke et al 1987) and on a great variety of insect pests for its toxicity, repellency or its effect on oviposition (Bekele and Hassanali 2001;Karemu et al 2013;Koul et al 2013;Li et al 2007;ObengOfori et al 1997;Saxena and Basit 1982), revealing highly contrasted results depending on the biological model, but was identified to reduce D. radicum oviposition by 75 % in laboratory conditions (den Ouden et al 1996). Raw products containing eucalyptol, such as essential oils or eucalyptus leaves, have also been studied for pest management (Batish et al 2008;Santos 2006).…”

“…We tested three VOCs previously described in the literature as affecting insect oviposition: eucalyptol, geraniol, citronellol with the hypothesis that they had the potential to limit infestation of crop plants in an agronomical context. Eucalyptol has been shown to reduce D. radicum oviposition by 75 % in the laboratory (den Ouden et al 1996), whereas geraniol and citronellol had never been tested before on D. radicum but have shown interesting oviposition reduction in other taxa (Klocke et al 1987;Li et al 2007;Saxena and Basit 1982). We also tested linalool with the hypothesis that it had the potential to increase plant infestation levels, because of its predominance in the VOC mix of the Chinese cabbage, which is attractive to D. radicum (Kergunteuil et al 2015).…”

Efficacy of <I>Leptospermum petersonii</I> oil, on <I>Plutella xylostella</I>, and Its Parasitoid, <I>Trichogramma pretiosum</I>

“…Neral has been reported to have an oviposition deterrent effect on the leafhopper, Amrasca devastans (Distant.) (Saxena and Basit 1982).…”

Assessing effects of <i>Equisetum ramosissimum</i> extract on hematological and serum biochemical parameters in pregnant Sprague-Dawley rats

“…The chemical composition of essential oils from Equisetum ramossisemum (In press) revealed that the oils contain a high content of monoterpenoids and sesquiterpenoids as compared to the oils of other Equisetums (Saxena and Basit, 1982). Various toxicities have been ascribed to oils that contain terpenes (Gordon et al, 1982).…”