Insecticidal and repellent effects of tea tree and andiroba oils on flies associated with livestock

Abstract

This study aimed to evaluate the insecticidal and repellent effects of tea tree, Melaleuca alternifolia (Myrtales: Myrtaceae), and andiroba, Carapa guianensis (Sapindales: Meliaceae), essential oils on two species of fly. For in vitro studies, free-living adult flies were captured and reared in the laboratory. To evaluate the insecticidal effects of the oils, adult flies of Haematobia irritans (L.) and Musca domestica L. (both: Diptera: Muscidae) were separated by species in test cages (n = 10 per group), and subsequently tested with oils at concentrations of 1.0% and 5.0% using a negative control to validate the test. Both oils showed insecticidal activity. Tea tree oil at a concentration of 5.0% was able to kill M. domestica with 100.0% efficacy after 12 h of exposure. However, the effectiveness of andiroba oil at a concentration of 5.0% was only 67.0%. The insecticidal efficacy (100.0%) of both oils against H. irritans was observed at both concentrations for up to 4 h. The repellency effects of the oils at concentrations of 5.0% were tested in vivo on Holstein cows naturally infested by H. irritans. Both oils demonstrated repellency at 24 h, when the numbers of flies on cows treated with tea tree and andiroba oil were 61.6% and 57.7%, respectively, lower than the number of flies on control animals. It is possible to conclude that these essential oils have insecticidal and repellent effects against the species of fly used in this study.

Efficacy and repellency of some essential oils and their blends against larval and adult house flies, Musca domestica L. (Diptera: Muscidae)

“…Even though tea tree oil was weakly (although not significantly) attractive to adult house flies in this study, it was highly repellent to 3 rd instar larvae of an Australian strain of L. cuprina at concentrations of 0.5, 2, and 5% (Callander and James ). Tea tree oil is also known to be toxic for adult house flies (Klauck et al ). Citronella oil was slightly repellent for adult house flies, although the repellency was not statistically significant.…”

Parasites in dairy cattle farms in southern Brazil

“…Con el tiempo, las dificultades en el control de los parásitos se incrementaron debido al aumento de la resistencia a la quimioterapia en su control y tratamiento, que a menudo resulta incontrolable. Asimismo, se han producido con el control de moscas, entre estos destaca la mosca domestica (a menudo relacionada con mastitis) y Haematobia irritans, un insecto hematófago que ha causado graves daños a la ganadería (3,5).…”

“…Además del daño causado directamente al animal, la garrapata causa daños al productor debido al gasto indirecto de acaridae, la mano de obra y los equipos necesarios para la aplicación de estos productos (4). Otro occurred with flies control, among these stands out the Musca domestica (often related to mastitis) and Haematobia irritans, a hematophagous insect that has caused serious damage to livestock (3,5).…”

Melaleuca alternifolia Essential Oil against the Lesser Mealworm (Alphitobius diaperinus) and Its Possible Effect on the Soil Fauna

“…This has motivated the search for efficient alternative control methods and that also have lower environmental impact. These requirements can be met using natural products, including essential oils, which have attracted the interest of many researchers (Prado et al, 2013;Pazinato et al, 2014;Klauck et al, 2014).…”