و تعيين فاز آن در مزارع نيشكر و برنج خوزستان LOCUSTA MIGRA TORIAL بررسي تاكسونومي

Investigation on Taxonomy of Locusta migratoria L. and its Phase Status in Sugercane and Rice Fields in Khuzestan Province

The migratory locust, Locusta migratoria L. is the most distributed species among Acridids in the world. At peresent time, 9 subspecies have been identified in the world, but there was no information about the taxonomy of the subspecies which exist in Khuzestan. In order to determine the taxonomical status of the population of this species in khuzestan , studies were done in seven areas that were under rice and sugar cane cultivation. The results showed that the populations of migratory locust had high correlation (%98.43 - %99.93) with each other in areas under investigation, therefore, these populations seem to belong to the same subspecies. There was also high correlation (%95) between the African migratory locust (L.m.migratoriodes) and specimens collected in Khuzestan. These results , indicate that according to F and C ratios, the Khuzestan population was in solitary status in 1996-1999. Some reasons for this situation, are probably the grasshopper genotype, monotony in vegetation and, topography and soil texture in sugar cane and rice fields.