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Browsing by Author "Efe, Davut"

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    Article
    Life Table Characteristics of Orius Minutus (L.) (Hemiptera: Anthocoridae) Feeding on Bemisia Tabaci (Gennadius) (Hemiptera: Aleyrodidae) at the Laboratory Conditions
    (Parlar Scientific Publications (p S P), 2015) Efe, Davut; Ozgokce, Mehmet Salih; Karaca, Ismail
    In the study, life table of Orius minutus (L.) (Hemiptera: Anthocoridae) feeding on Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) was constructed at the laboratory conditions adjusted to 25 +/- 1 degrees C, 65 +/- 10 % relative humidity and 16 hours of artificial light. B. tabaci used as prey was reared on cotton plant at climatic chamber. As a result of the study, it was determined that total developmental period and mortality rate of O. minutus female and male were 19.80, 20.54 days and 23%, 24% respectively; longevity of O. minutus were 57.40 days for female and 29.98 days for male. Pre-oviposition, oviposition and postoviposition periods were 3.84, 34.20 and 19.00 days, respectively, daily egg numbers were 3.69 and total egg numbers were 180.97. Reproductive value reached the highest value at 5th days of oviposition period. Intrinsic rate of increase (r(m)) was 0.121 female/female/day, net reproductive rates (R-o) was 60.446 females/female, mean generation time (T-0) was 33.892 days, gross reproductive rate (GRR) was 78.684, doubling time (T-2) was 5.727 days and finite rate of increase (lambda) was 1.129. The most appropriate reproduction curve was calculated by Enkegaard equation and parameters were found as follows; a = 0.711 +/- 0.049; b = 0.09+/-10.004; R-2 = 0.926. Weibull distribution was used to determine the best curve showing survival rate for females and males of Onus minutus and parameters were found as follows; for females, b = 57.4+/-0.019, c= 2.26+/-0.007, R-2 = 0.818; for male, b = 31.67+/-0.014, c = 1.77+/-0.0.06, R-2 = 0.918.
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    Article
    The Life Table of the Lucerne Beetle, Gonioctena Fornicata (Bruggem) (=phytodecta Fornicatus Bruggem) (Coleoptera, Chrysomelidae) on Alfalfa Under Laboratory Conditions
    (Entomological Soc Turkey, Ege Univ, 2014) Efe, Davut; Ozgokce, Mehmet Salih
    In this study, the life table of Gonioctena fornicate (Brugg.) was constructed at 25 +/- 1 degrees C constant temperature, 60 +/- 5% relative humidity and 16:8 light:dark period in a climate cabinet. Life table parameters were calculated using the Euler-Lotka iteration method and their values were: Intrinsic rate of increase (r(m)), 0.015; Net reproductive rate (R-0), 180.25 females/female; Mean generation time (T-0), 353.03 days; Gross reproductive rate (GRR), 287.93 females/female; using Doubling time, (T-2) 47.11 days and Finite rate of increase (lambda), 1.02 females/female. The fecundity rate was fitted in the Enkegaard equation and parameters were calculated as a = 0.886 +/- 0.055; b = 0.052 +/- 0.002. Mean development times using for both sexes were: egg, 5.07, 2.85 days; larvae1, 2.83, 2.72 days; larvae2, 2.10, 2.36 days; larvae3, 2.15, 2.29 days; larvae4, 4.46, 4.29 days; pupae, 7.92, 7.69 days; total development time, 24.40, 24.32 days for females and males, respectively. Additionally, using preoviposition, oviposition, postoviposition and generation times were 305.53, 32.73, 30.07 and 331.60 days, respectively. Life span of females was 366.07 days and it was 371.7 days for males. The best survivership curve was fitted to the Weibull distribution; its shape was defined as a Type l survivorship pattern and the calculated parameters were: b = 382.14 +/- 0.429 and c = 11.34 +/- 0.231.