تقنية سهلة لغربلة نباتات العدس لمقاومة حشرة سوسة أوراق العدس Sitona crinitus Herbst (Coleoptera : Curculionidae)‎ تحت ظروف الإعداء الاصطناعي

Abstract EN

Sitona crinitus H.

is a major insect pest of lentil in North Africa and West Asia.

The objective of this study was to determine the optimum adult density required to screen lentil for resistance to Sitona under artificial infestation.

This study was carried out in the plastic house and in the field at Tel Hadya, ICARDA.

The results showed that infesting 10 lentil seedlings with 2 pairs (2 females + 2 males) of Sitona caused high nodule damage (60%), which was not significantly different from that of the other densities (4, 6, 8, 10 pairs).

However, 6 pairs were needed to cause high leaflet damage (visual damage score of 7 in a 1-9 scale).

A high correlation between visual damage score and nodule damage was observed, r= 0.69 and 0.75 in the field and plastic house, respectively.

Because of this positive correlation, the evaluation of lentil for resistance to Sitona under artificial infestation could be based on visual damage score alone.

Thus, large numbers of lentil accessions could be screened for resistance to this pest in a short period of time.