Investigations on harmful and beneficial entomofauna in common spring vetch under the conditions of Dobrudzha region
2008
Dimitrov, D. | Kontev, Kh. | Lecheva, I.
Results from the investigation on harmful and beneficial entomofauna in common spring vetch under the conditions of Dobroudja region have been discussed. The studies were carried out during 2004 and 2005 in the trial field of Dobroudja Agricultural Institute - General Toshevo. Classical methods of entomology were used to establish the species composition of spring vetch entomofauna, the population numeral dynamics of prevailing harmful species and their entomophages under the regionally specific environmental conditions, both abiotic and biotic. The weevils of genus Sitona, pea aphid - Acyrtosiphon pisum /Harris, 1776/, black bean aphid - Aphis fabae /Scopoli, 1763/ i, pea thrips - Kakothrips robustus /Uzel, 1895/, and leaf-mining flies of Agromyzidae family were identified as harmful species of economic importance on spring vetch. Among the entomophages on leaf aphids most numerous were the Coleoptera species - Rhagonycha fulva /Scopoli, 1763/, Harpalus rufipes (Degeer, 1774), and the coccinellids Propylaea quatuordecimpunctata /Linnaeus, 1758/ and Coccinula quatuordecimpustulata (Linnaeus, 1758). Species from genus Opius were detected parasitizing on the larvae of leaf-mining flies from Agromyzidae family.
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