Paper Information

Journal:   IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE)   2006 , Volume 37 , Number 1; Page(s) 65 To 71.
 
Paper: 

LIFE TABLE AND SURVIVAL RATE OF TETRANYCHUS URTICAE (ACARI: TETRANYCHIDAE) ON DIFFERENT BEAN VARIETIES

 
 
Author(s):  FATHIPOUR Y.*, AHMADI M., KAMALI K.
 
* FACULTY OF AGRICULTURE, TARBIAT MODARES UNIVERSITY, TEHRAN
 
Abstract: 

Life table parameters and survival rate for Tetranychus urticae Koch were determined on four bean varieties namely Talash (Colorado bean), Sadaf (Navy bean), Goli (Kidney bean) and Parastoo (Black-eye bean). Eight cohorts of one day old eggs of T. urticae were placed in Tashiro cages on the leaves in each of the varieties and preserved in growth chamber with laboratory conditions of 25±1° C and 60±5% RH as well as a photoperiodism of 16:8(L:D) hours. Life table and survival rate of T. urticae were studied on each bean variety up to the death of the last female mite. The results indicated that the death of the last individual adult female on Talash, Sadaf, Goli and Parastoo occurred in 24, 23, 23 and 23 days, respectively. Life expectancy on the four mentioned varieties was estimated as 15.51, 12.77, 13.11, and 11.73 days, respectively as on the first day of adult appearance, which revealed a maximum rate of life expectancy for Talash variety. On the four mentioned varieties, the mite egg hatch rate was determined as 83.35, 62.40, 81.35, and 56.95 percent. The survival rate of individuals developed into adults from the initial cohort stage was reported as 40.40, 25.13, 23.13 and 21.73 percent, respectively. The results indicate that Talash variety is a more suitable host plant for T. urticae in comparison with others in the study.

 
Keyword(s): TETRANYCHUS URTICAE, LIFE TABLE, SURVIVAL RATE, BEAN VARIETIES
 
References: 
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