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Comparative life table analysis of Tetranychus urticae (Acari: Tetranychidae) on 14 soybean genotypes
Author(s) -
Sedaratian Amin,
Fathipour Yaghoub,
Moharramipour Saeid
Publication year - 2011
Publication title -
insect science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 45
eISSN - 1744-7917
pISSN - 1672-9609
DOI - 10.1111/j.1744-7917.2010.01379.x
Subject(s) - tetranychus urticae , biology , fecundity , acari , spider mite , population dynamics , horticulture , zoology , botany , population , demography , sociology
The life table parameters of two‐spotted spider mite (TSSM), Tetranychus urticae Koch, on 14 soybean genotypes (Sari, Sahar, Tellar, Zane, Ks3494, L 17 , Dpx, 032, 033, Clark, Hill, I27, Tms and Williams) were evaluated at 28 ± 1°C, 65%± 5% RH and a photoperiod of 16 : 8 h L : D. The survivorship data ( l x ) of adult females were fitted to the Weibull frequency distribution model in all genotypes tested. Based on the Weibull parameters, the survival curve was type I on all genotypes, which indicated that the mortality mostly occurred in old individuals. Furthermore, two mathematical models (Analytis and Enkegaard) were fitted to age‐specific fecundity data ( m x ). The highest intrinsic rate of increase ( r m ) was recorded on L 17 (0.392) and the lowest values of this parameter were obtained on Tms (0.233), Hill (0.236), 032 (0.236), I27 (0.237) and Clark (0.240). In addition, net reproductive rate ( R 0 ) and finite rate of increase (λ) of the TSSM had the highest value on L 17 as 45.521 and 1.475, respectively. The lowest values of these parameters were recorded on Tms as 12.149 and 1.258, respectively. Doubling time ( DT ) varied significantly on different genotypes and the shortest and longest values of this period were obtained on L 17 and 032, respectively. Our findings revealed that Tms, Hill, 032, I27 and Clark were less suitable genotypes, suggesting that they are more resistant to the TSSM than the other genotypes.