Study on the dynamism of dominant cereal aphid lady beetles species population in west Azarbaijan
2010
Alizadeh, E. | Malkeshi, S. H.
Lady beetle are of significant role in the control of various pests agricurtural ecosystem and knowledge of the populational dynamism of these insects and the application of supportise and protective strategy as well as their massive propagation release can be effective in control of most pests population.In this survey,weekly enummeration of 50 aphid infected wheat plant during its growth period led to the determination of the dominant aphid species in Khoy, Chaldaran and Miandoab regions and after then wheat field lady beetle were collected and investigated following several approaches and through regular weekly samplings.After the identification of lady beetle species and their comparison of the population average of species, dominant species was determinated and the dynamism of the population of various aphid and lady beetle species was specified through weekly statistical sampling of 100 wheat plants infested by aphids and the enummeration of the lady beetle (larvae,pupa and mature) on the infested plants during wheat growth period predator population curves of dynamism were drawn for both year and by thia means,the peak of lady beete population in the growth season was determined.Our investigation indicated that Coccinella septempunctata was the dominant lady beetle of the regional wheat field and of the most abundant population in Chaldaran. Thea 22-punctata and Adonia variegata were found in the studied field.Out of the aphids, Sitobion avenae was dominant species and only the few numbers of Metopolophium sp. and a single sample of Schizaphis graminum was observed in the gleened sample(Chaldoran). Considering the significant difference of the populational averages of S.avenae in the investigated area, population density of the mentioned aphid species was high in Chaldaran compared to those in other regions.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Agricultural Research and Education Organization