Paper Information

Journal:   APPLIED ENTOMOLOGY AND PHYTOPATHOLOGY   March 2002 , Volume 69 , Number 2; Page(s) 155 To 170.
 
Paper: 

THE QUANTITATIVE LOSS ASSESSMENT OF SUNN PEST OF WHEAT (EURYGASTER INTEGRICEPS PUT.) IN GHAZVIN REGION

 
 
Author(s):  NOORI H., AZMAYESHFARD P., KHARAZI PAKDEL A., ABD ELAHI GHOLAM ABAS, NOURI GHANBALANI GH.
 
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Abstract: 

One of the fundamental aspects in integrated Sunn pest management is that to consider economic injury level for appropriate control application. The aim of present study, was to assest quantitative losses caused by Sunn pest on wheat crop in Ghazvin during 1998- 1999.
In order to achive the above mentioned goal, were used cages with the dimension 2X 1.5X1.8 meter. Sunn pest quantitative loss assessment was at the ft.amework of factorial test based on randomized complete block design with five replications .The first factor were Alvand and Zarrin wheat varities and the second factor were over wintered adult Sunn pest densities including 0,2,4,6.8, 10, 12.15, 17,20 individual per square meter. The factors involved in assessing consisted of the yield, number of damaged spike and shoot ,the weight of 1000 grains and yield reduction.
The ersults of study were as follows : The yield loss mean in over wintered adult densities for Alvand wheat variety included 123.5,80.03,53.5,50.49,45.5,38.28,4087, 41.98,38.66 Kilograms per Hectre and 83.55,68.1,50.67,40.43,44.8,41.26,42.53,43.19,46.18 Kilograms per Hectre for zarrin wheat variety. Results showed that, there was a linear regression between pest population densities and yield reduction. Also there was positive correlation at 1% level between number of damaged spikes and shoots and reduction percentage on Alvand avd Zarrin varieties with adult Sunn pest population densities.

 
Keyword(s): SUNN PEST (EURYGASTER INTEGRICEPS PUT.), LOSS ASSESSMENT, WHEAT, GHAZVIN
 
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