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Paper Information

Journal:   JOURNAL OF AGRICULTURAL SCIENCE (UNIVERSITY OF TABRIZ)   2005 , Volume 15 , Number 1; Page(s) 45 To 50.
 
Paper: 

ESTIMATING TOTAL PARASITISM THROUGH MUMMIFIED APHIDS BY APHIDIIDAE

 
 
Author(s):  BABAEI MOHAMMAD REZA, SAHRAGHARD A., REZVANI ALI
 
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Abstract: 

For determination of percent parasitism of the aphid, Thelaxis suberi (Del Guercio) (Thelaxidae) parasitized by Adialytus thelaxis Stary (Aphidiidae), samples were taken from oak trees at four times in Abbas Abad, Behshahr, Mazandaran province, Iran during 1998-99. Sampls were taken randomly from cutted apical shoots having 10 centimeter length. Mummified aphids were counted carefully in the laboratory. Alive aphids were dissected under a stereomicroscope and parasitoid larvae were counted. Percentage of parasitied unmummified aphids (arcsine transformation) was plotted against percentage of mummified aphids (Mp) and the linear regression model of Nmˆ = - 0.82Mp + 57.3 was obtained. By incorporating estimated percentage of unmummified parasitism (Nmˆ) in model (2): Tp=Mp+ Nmˆ total percentage of parasitism (Tp) was estimated.
Therefore, by means of these models it is not necessary to dissect aphids to determine percent parasitism. Total parasitism (Tp) could be estimated through determining merely the percent parasitism of mummified aphids.

 
Keyword(s): ADIALYTUS THELAXIS, APHIDIDAE, OAK TREE, PERCENT PARASITISM, THELAXIS SUBERI
 
References: 
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