An evaluation of the effect of botanical insecticide, palizin in comparison with chemical insecticide, imidacloprid on the black citrus aphid, Toxoptera aurantii Boyer de Fonscolombe and its natural enemy, Aphidius colemani Viereck

Abstract

Th e black citrus aphid, Toxoptera aurantii Boyer de Fonscolombe (Hemiptera: Aphididae), an important pest of citrus species, feeds by sucking sap from plant leaves. It causes some leaf distortion and malformation of growing leaves and shoot tips. In this study, the eff ects of the botanical insecticide, palizin on T. aurantii and its parasitoid, Aphidius colemani Viereck (Hymenoptera: Brachonidae) were compared with the chemical insecticide, imidacloprid. Th e compounds were evaluated at maximum recommended fi eld concentrations: palizin 2,000 ppm, imidacloprid 500 ppm, water (as control) on adult aphids. Spraying was done with a 100-l engine Honda sprayer (GX120T1, 160T1, 200T) until run-off . Th e number of dead aphids was recorded 24, 48 and 72 hours aft er treatment. According to the results, statistically signifi cant diff erences were found between treatments (p ≤ 0.05). Twenty-four hours aft er treatment, imidacloprid was more eff ective than palizin in reducing the T. aurantii population. Palizin showed high effi ciency (95% mortality) 72 hours aft er treatment. However, at that time, there was no statistically signifi cant diff erence between the mean mortality percentages of imidacloprid and palizin. Th is shows that botanical insecticide, palizin can eff ectively control T. aurantii. Also, palizin caused low mortality (10.86%) on A. colemani while imidacloprid was more toxic (31.1% mortality). Th e results of the present study indicated that palizin can be used instead of chemical insecticide, imidacloprid in control programs of T. aurantii.

Transcriptomic Profiling of Various Developmental Stages of Aphis Aurantii to Provide a Genetic Resource for Gene Expression and SSR Analysis

“…Moreover, functional studies of the new insecticide targets in aphids were also conducted in these aphids (Ye et al, 2019 ; Shang et al, 2020a ). However, most previously published papers have focused on the ecology (Alizadeh Kafeshani et al, 2018 ; Guidolin and Consoli, 2018 ; Li et al, 2019 ), control (Aslam et al, 2015 ; Gholamzadeh-Chitgar and Pourmoradi, 2017 ), and mitochondrial genome (Wang et al, 2019 ) in tea aphid Ap. aurantii .…”

Effects of Several Botanical Insecticides Applied in Different Periods to Control Aphids (Macrosiphoniella sanborni Gillete) on Chrysanthemum

“…Active compounds of this botanical insecticide were less toxic to mammalian and would be naturally degraded in specific periods, thus safer to human health and the environment (El-Wakeil, 2013). Several reports also indicated that botanical insecticides had high specificity on targeted insect pests (Gholamzadeh-Chitgar & Pourmoradi, 2017;Zeb, Naeem, Khan, & Ahmad, 2016).…”

The PacBio Full-Length Transcriptome of the Tea Aphid as a Reference Resource

“…The transcriptomes of an increasing number of species have been deposited and accessible in public databases, such as the National Center of Biotechnology Information (NCBI) Sequence Read Archive (SRA) database, which is the most popular repository of RNA-Seq data. No such data for A. aurantii is available in that database, as the majority of the published studies have focused on its ecology or control ( Aslam et al, 2015 ; Zekri et al, 2016 ; Gholamzadeh-Chitgar and Pourmoradi, 2017 ; Alizadeh Kafeshani et al, 2018 ; Li L. et al, 2019 ). In addition to protein-coding genes, non-coding genes also play important roles in insects, e.g., long non-coding RNAs (lncRNAs), defined as transcripts longer than 200 nucleotides that do not show any protein-coding capability ( Legeai and Derrien, 2015 ).…”