Ola Salman*(1) , Atia Arab(1), Mohammad Ahmad(2) , Yosef Wajhani (3) and Osama Mohra(3)
- Agricultural Scientific Research Center – Lattakia – Syria
- Faculty of Agriculture – Tishreen University – Lattakia – Syria
- General Commission For Scientific Agricultural Research (GCSAR), Damascus, Syria
(*Corresponding author: Eng. Ola Salman. E-Mail: olasalman1993@gmail.com).
Received: 21/05/2020 Accepted: 28/06/2020
Abstract
The aim of this study was to investigate the prevalence of Earias insulana (Lepidoptera: Nolidae) in the Syrian coast, and assessing the susceptibility of some local genotypes (14 genotypes) and two commercial varieties to the insect under field conditions at the Center for Scientific Agricultural Research in Lattakia (Bouka) According to the design of complete random sectors and four repeaters per genotype, during 2018 season. The findings showed prevalence of spiny bollworms in the coastal region, ranged from 5 to 800 m above sea level, under irrigated and rainfed conditions. The average of infestation rate was between 3.6% and 30.7% in lattakia, and between 2.7% to 38.8% in Tartous. The results showed that all tested genotypes were susceptible to spiny bollworm. The lowest incidence of spiny bollworm on fruit at tendering maturity was 12.78% on the fruits of genotype (12188) and the highest incidence attained (19.52%) on the fruits of genotype (10974) during the months of June, July, August and September. During the physiological maturity the percentage of the infected fruits at the end of the season during the month of October ranged from (57.44%) to (91.36%). The results also showed that the highest injury intensity was (2.4 larva/fruit) on the fruits of the French variety, while the lowest severity of injury was (1.1 larva/fruit) on the fruits of the genotype (10374) . The loss of seed weight ranged from 45.75% in the genotype 11353 to 72.25% in the genotype 10521.
Key words: Earias insulana (Boisd.), Okra, Spiny bollworm, Coastal area, Syria.
Full paper in Arabic: PDF