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Journal Cover Journal of Entomological and Acarological Research
  [2 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 2038-324X - ISSN (Online) 2279-7084
   Published by PAGEPress Homepage  [75 journals]
  • Trials on the Timing of Chemical Control of Lentil weevil, Bruchus lentis
           Frӧlich (Coleoptera: Chrysomelidae: Bruchinae) in Lentil Field in
           Gachsaran Region (Iran)

    • Authors: K. Saeidi, S. Mirfakhraie
      Abstract: The lentil weevil, Bruchus lentis Frӧlich, (Coleoptera: Chrysomelidae: Bruchinae) is the most serious pest of lentil in Iran. Economic losses due to this pest reach up to 40% of the lentil crop. Over a two-year study (2012 and 2013) in Agricultural Research Station of Gachsaran Region, best timing of chemical control of B. lentis was determined. A field experiment with cultivation of lentil Sina variety Lens culinaris Medik was conducted in a randomized complete block design with five treatments and three replications. The treatments consisted of spraying four times (respectively, during the early flowering, 10 days after the first spraying, 10 days after the second spraying; 10 days after the third spraying) and control (without spraying). For the spraying from Endosulfan insecticide EC50% at ratio one liter per hectare was used. Three samples were taken from the pods and totally 150 pods from each replicate for contaminations of seeds were investigated. After the determination of the percent of seeds contamination, results were statistically analysed. Based on the results obtained, first spray treatment, with the mean contamination of 15.45% and second spray treatment with the mean contamination of 12.25% had the highest impact on reducing contamination lentil seeds to B. lentis and between them there was no statistically significant difference and were in one group. Therefore, spraying one time during the early flowering until 15 days after it was the best time to control of B. lentis.
      PubDate: 2018-01-25
      Issue No: Vol. 49, No. 3 (2018)
       
  • Aphids and ladybird beetle’s abundance and diversity in alfalfa fields
           of Yasouj, southwestern of Iran

    • Authors: S. Mirfakhraie, K. Saeidi
      Abstract: Alfalfa (Medicago sativa L.) is the oldest and the most important forage legume. It has been cultivated for forage longer than any other crop. Diversity indices provide information about community composition. Diversity indices are measured by species richness and species evenness therefore, it could give us more ecological information rather than a simple species list in the fields. During 2015-2016, aphids and ladybird beetle’s abundance and diversity were monitored in alfalfa fields of Yasouj. Samplings were conducted with 150 plants in the alfalfa fields from mid-May to mid-November. Species richness was measured using Shannon and Simpson indices. In this study, six aphids and five coccinellid species were collected and identified. Among the collected aphid species, Aphis fabae (Scopoli, 1763) and Therioaphis maculata (Buckton, 1899) were most abundant in the fields. For coccinellids, Coccinella septempunctata L. was the most abundant species. Highest aphid species diversity was observed on 17 May 2016.
      PubDate: 2018-01-25
      Issue No: Vol. 49, No. 3 (2018)
       
  • Chemical composition and insecticidal activity Mentha piperita L.
           essential oil against the cowpea seed beetle Callosobruchus maculatus F.
           (Coleoptera: Bruchidae)

    • Authors: K. Saeidi, S. Mirfakhraie
      Abstract: Antifeedant activity of plant extract from Mentha piperita was tested against the cowpea seed beetle, Callosobruchus maculatus. Dry ground plant was subjected to hydrodistillation using a Clevenger-type apparatus. The resulting oil contained menthone (28.9%), menthol (28.5%), and pulegone (6.9%) as the major compounds. LC50 of M. piperita essential oil was 25.70 μL/L air and mortality increased as the doses of essential oil increased. LT50 values were 3.29, 2.74 and 1.89 h at 100, 200 and 500 μL/L air, respectively. The results of persistence test of oil revealed that essential oil of M. piperita on C. maculatus adults was 5.44 days. It was clear from the repellency index that M. piperita essential oil has strong repellency at 90, 180 and 360 μL/L air concentration. The results showed that M. piperita essential oil has significantly affected the relative growth rate, relative consumption rate and feeding deterrence index of C. maculatus adults and it was concentration-dependent. The efficiency of conversion of ingested food has decreased while the concentrations are not statistically different at 5% level compared to the control group. It seems that essential oil can be used as low-risk insecticides.
      PubDate: 2018-01-25
      Issue No: Vol. 49, No. 3 (2018)
       
  • Eurycnemus v. d. Wulp (Diptera, Chironomidae) newly recorded in China

    • Authors: L. Li, H. Tang
      Abstract: Pharate male, pupa and larva of Eurycnemus cf. nozakii Kobayashi 1998 are described based on the associated material collected from Liaoning Province. This is the first record of this genus in China. The Chinese species is distinctly smaller than the Japanese E. nozakii at all stages, which can be separated from congeners by the presence of hind tibial comb and the absence of basal strong seta on the gonostylus in the male, some differences are also found in the immature stage, which suggest an independent new species rather than the true E. nozakii. Detailed differences are compared among similar taxa from Japan, Russian Far East and China. Pupal exuviae collected from Fujian and Yunnan Provinces were also examined, which can be separated from the above species by the short male genital sac. Because of few different characters at the immature stage among these similar taxa from a wide range, the possible high diversity within this genus is suspected. Based on the current knowledge, the generic diagnosis is emended.
      PubDate: 2018-01-25
      Issue No: Vol. 49, No. 3 (2018)
       
 
 
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