Insecticidal Activity against Bemisia Tabaci Biotype B of Peel Essential Oil of Citrus sinensis var. pear and Citrus aurantium Cultivated in Northeast Brazil

Abstract

The fumigant action of peel essential oils of Citrus sinensis var. pear (pear orange = PO) and C. aurantium (bitter orange = BO) from the northeast of Brazil were evaluated against Bemisia tabaci biotype B and compared with eugenol as a positive control. The oil concentration in the PO at 8.5 μL/L of air caused 97% mortality, while the oil concentration of BO at 9.5 μL/L of air caused 99% mortality. However, the LC 50 estimates for both oils (LC 50 = 3.80 μL/L of air for PO and LC 50 = 5.80 μL/L of air for BO) did not differ from each other, but they did when compared with eugenol (LC 50 = 0.20 μL/L of air). Regarding their effects on oviposition, the Citrus oils showed concentration-response dependence, reducing the number of eggs as the concentration increased, which was not observed for eugenol. The minimum concentrations of the oils that caused a significant reduction in the egg lay were 3.5 and 7.0 μL/L of air for BO and PO, respectively. These results suggest that oils from PO and BO peels may be promising as models to develop new insecticides that might be applied into the integrated management of whiteflies.

In Vitro Potential of Clary Sage and Coriander Essential Oils as Crop Protection and Post-Harvest Decay Control Products

“…Against B. tabaci, diverse EO were previously evaluated, such as those from Citrus aurantium peels, Citrus sinensis, Allium sativum, Agastache rugosa, Illicium verum, Chenopodium ambrosioides, Schizonepeta tenuifolia, Curcuma aeruginosa, Syzygium aromaticum or Valeriana officinalis [12,76,77]. Among all the tested EO, the strongest fumigant activities were obtained with the EO from A. sativum, C. aurantium and A. rugosa, with respective LC 50 values of 0.11 µg L −1 , 3.97 and 5.8 µL L −1 and 7.08 µg L −1 [12,76,77]. In contrast, some EO did not result in any fumigant toxicity at the tested concentrations, such as those from S. tenuifolia, C. aeruginosa or V. officinalis [76].…”

Review on selected essential oils from America as applied resources to control Bemisia tabaci, an important agronomical pest

“…In the fumigant assay, C. sinensis EO was the most active (LC 50 = 3.80 μL/L air), followed by C. aurantium EO (LC 50 = 5.80 μL/L air). In the oviposition deterrence assay, the C. sinensis EO was also more efficient than C. aurantium, presenting an IC 50 = 4 μL/L air against a value equal to 5 μL/L air[33].…”

Contact and Fumigant Activities of Citrus aurantium Essential Oil against the Stable Fly Stomoxys calcitrans (Diptera: Muscidae)

“…The essential oil from this plant, which shows insecticidal activity, contains limonene (terpenes group) as its main component [20][21][22][23]. Moreover, the essential oil from C. aurantium has been found to have insecticidal activity against various insect pests, including larvae of cotton leafworm (Spodoptera littoralis) [24], larvae of tomato leafminer (Tuta absoluta) [24,25], larvae of mosquito (Anopheles stephensi) [22], rusty grain beetle, (Cryptolestes ferrugineus), red flour beetle (Tribolium castaneum), book louse (Liposcelis bostrychophila) [23], house fly (M. domestica) [21], cowpea seed beetle (Callosobruchus maculatus) [26], and silverleaf whitefly (Bemisia tabaci) [27]. However, the insecticidal activity of the C. aurantium essential oil against stable flies has not yet been reported.…”