Paper Information

Journal:   APPLIED ENTOMOLOGY AND PHYTOPATHOLOGY   September 2002 , Volume 70 , Number 1; Page(s) 49 To 62.
 
Paper: 

INVESTIGATION ON THE REASONS OF FOOD PREFERENCE OF RED PALM WEEVIL, RHYNCHOPHORUS FERRUGINEUS (OLIV.)

 
 
Author(s):  FARAZMAND H.*
 
* Plant Pests & Diseases Research Laboratory, Saravan, Sitstan and Baluchestan province. Iran
 
Abstract: 

Red palm weevil (RPW). Rhynchophorus ferrugineus Oliv., is a destructive pest of different palms in Asia, North Africa and South Europe. At present time, it is an internal quarantined pest in Iran which damage on date palm is limited to Saravan region (Sistan & Balouchistan province). Based on accomplished investigation. Mazafati date palms were the most desirable host for RPW.
Several experiments were caried out on the food preference of RPW on 5 date palm varieties includings Mazafati, Rabbi, Halileh, Zardan, Pimazoo and a native wild palm (Nannorrhops ritchiana (Griff) Aitch.), during 1999-2001.
Based on the laboratory studies, larval mortality maximum and minimum were in Zardan and Halileh, respectively. The highest pupal mortality was recorded 100%, which found in wild palm. The maximum and mlI1lmUmof adult emergence were observed for Mazafati and wild palm respectively. The life span of RPW was maximum in Zardan and minimum in Mazafati. The highest and lowest daily oviposition were observed in Mazafati and Zardan respectively.
To determine the reasons offood preference ofRPW, vascular tissues of different varieties of date palms and wild palm were analysed and dry weight. crude fibre. total sugar, fat and 12 chemical elements were measured. The stepwise multiple regression analysis showes that, the intraction of various nutrient components affects the vital qualifications of RPW. The most effectine nuitrients and element were found sugar and calcium. Sugar was correlated with growth and daily oviposition and reduction in mortality, while increasing of calcium clearly inhibited RPW growth.

 
Keyword(s): RHYNCHOPORUS FERRLLGINEUS, FOOD PREFERENCE, DATE PULM
 
References: 
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