Influence of the Nutritional Quality of Three Date Varieties on the Biological Parameters of the Date Moth, Ectomyelois ceratoniae Zeller
Influence of the Nutritional Quality of Three Date Varieties on the Biological Parameters of the Date Moth, Ectomyelois ceratoniae Zeller
Ayoub Hadjeb1,2*, Ismahane Lebbouz3 and Yasmine Adjami4
ABSTRACT
The nutritional and allelochemical quality of the host plant plays an important role in the population dynamics of insects. The dates moth Ectomyelois ceratoniae is considered one of the most dangerous pests threatening date production in Algeria. Our results show that the highest relative rate of intake (RRI) and relative growth rate (RGR) were observed in larvae fed by Deglet Nour variety just as The efficiency of biomass conversion of digested food (ECD) and ingested food conversion efficiency (ICE) in Ghars and approximate digestibility (AD) in Mech Degla. The calculation of gravimetric index (nutritional) consumption and utilization of food showed a very highly significant difference (RRI,RGR, ECD and ICE: P <0.0001; AD: P <0.0004) between larvae fed by the dates of the three varieties of dates (Deglet Nour, Mech Dagla and Ghars).We have determined the influence of different food substrates on biological parameters of dates moth. While the nutritional quality of the three varieties of dates has no effect on the fertility of females and eggs. The control of this pest requires knowledge of the bio-ecology under the effect of various biotic and abiotic factors. This results will represent a fundamental data in mechanisms interpretation of variation in abundance of this pest.
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