Green peach aphid [Myzus persicae (Sulzer) (Hemiptera: Aphididae)] control using Brassicaceae ethyl ester oil sprays

Abstract

Control of green peach aphid (Myzus persicae), a globally important pest, using plant‐derived oils is a promising alternative to conventional insecticides. Although various plant‐derived oils are potentially useful for insect control, dose–response studies and efficacy comparisons among oils have not been widely reported. Our objective was to compare M. persicae control by plant‐derived oils, focusing on oils derived from Brassicaceae species that exhibit rotational and environmental quality benefits. We thus applied sprays of emulsified ethyl esters from the seed oils of yellow mustard (Sinapis alba), oriental mustard (Brassica juncea) and rapeseed (Brassica napus) to M. persicae in a laboratory bioassay. A dose–response relationship was modelled for the S. alba spray yielding LD50/LD95 values of 18.2 ± 0.87/128.1 ± 5.10 μg ester per cm2 (P < 0.0001). Ethyl esters of oils from all three species and soybean (Glycine max) ethyl ester were compared to determine the efficacy of Brassicaceae oils relative to the dominant plant‐oil spray currently available. All ethyl esters were equally efficacious despite measured differences in fatty acid profiles among the oils. Oils derived from mustards B. juncea and S. alba are potentially useful feedstocks for the production of insecticidal sprays, and testing on additional insects is warranted.

The Effect of Seaweed Extracts on Chemical Composition of Tomato Plant (Solanum lycopersicum)

“…A pronounced differences were estimated in the case of treatment with green algae extract in one site and red algae extract or control in another site. Similar results were obtained by Hansson et al (2012), they proved the presence of ethyl ester in tomato extract. Tikunov et al (2005), also, recognized hexadecanoic acid, ethyl ester in tomato plant extract (Lycopersicone sculentum) genotype.…”

“…Similar results were obtained by Juliana et al (2016) they recognized phytol as bioactive compound of tomato extract. Also, Hansson et al (2012) reported that treatment with green algae (Ulva lactuca) extract led to an increase in the concentration of some biologically important compounds such as Tetraacetyl-d-xylonic nitriled -as in Figure 5. This compound have bioefficiency as stated in the study at Imad et al (2015).…”

Application of Tomato Leaves Extract as Pesticide Againstaphis Gossypii Glover (Hemiptera: Aphididae).

“…Table (1) demonstrated that, although the extract concentrations were low, the mortality rate of the adults of Aphis gossypii was high and when the concentrations increased, the total mortality increased. These results were in agreement with Hansson et al (2012) which proved the effectiveness of ethyl ester oil on Myzus persicae. Table (3) and Fig.…”

Toxic and in vitro anti-acetylcholinesterase and anti-carboxylesterase effects of various plant extracts on Aphis gossypii Glover, 1877 (Hemiptera: Aphididae)

“…Thus, this study was undertaken to determine the potential plant extract activities and to provide data for future studies. It was reported that there may be increases in insecticidal and enzyme inhibition periods in parallel with the increase in plant extract concentrations (Junqing et al, 2011;Hansson et al, 2012). In the literature, it is mentioned that plant metabolite alkaloids and terpenes can have significant insecticide effects; however, they are not economic or safe in addition to the fact that they are difficult to isolate (Rattan, 2010).…”