Mouzahem Mohammad ALDahoul* ⁽¹⁾, Samir Mohammad Tabbache ⁽²⁾ , Bahaa Ahmad Al-Rahban⁽³⁾and Gassan Abdalrhman Al-Lahham ⁽⁴⁾

(1). Salamieh Center of Scientific Agricultural Researches (SCSAR, Hama, Syria.

(2₎ Department of Plant Protection, Faculty of Agriculture, Tishreen University, Lattakia, Syria.

(3₎ Administration of Plant Protection Research, (GCSAR, Damascus, Syria.

(4₎ Salamieh Center of Scientific Agricultural Researches (GCSAR, Hama, Syria.

(*Corresponding author:  Mouzahem Al-Dahoul. E-Mail: m.dahool1975@gmail.com ).

Received: 19/03/2020         Accepted: 13/04/2020

Abstract

The experiment was carried out by the split plots design, with three replications, at the Scientific Agricultural Research Center in Salamieh (Syria), during the growing season 2018/2019, to study the effect of three sowing rates of lentil (250, 300, 350) seeds/m² in the competitiveness of wild mustard (Sinapis alba L.) which sowing at four densities (5, 10, 15 and 20 plants/m²), in addition to hand weeding check on the growth and productivity of lentil from hay and seeds, and determination of the critical economic limit for control. The results showed that the sowing rate of 300 seeds/m² gave the highest competitiveness of lentil, the best lentil growth, and the highest productivity of hay and seeds with 4256 and 2324 kg/ha, respectively. The hand weeding treatment at a sowing rate of 300 seeds/m² gave the best lentil growth and the highest productivity of hay and seeds with 4980 and 2830 kg/ha, respectively, compared to the rest of the treatments. The gradual increase in the density of wild mustard from 5 to 20 plants/m² gave its competitiveness, which was negatively and gradually reflected on the growth and productivity of lentil. The results of the research indicate that the critical economic limit for controlling wild mustard started at a density of 5 plants/m², and that increasing the plant density of wild mustard at the rate of one plant/m² decreased the productivity of lentil by 80.22 and 49.62 kg/ha of hay and seeds, respectively.

Key words: Sowing rate, Lentil Competitiveness, Critical economic limit, Wild mustard.

Full paper in Arabic: PDF