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  • Author or Editor: Daniela Atanasova x
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Monitoring the seasonal flights of the yellow alfalfa geometrid, Isturgia arenacearia (Denis and Schiffermuller, 1775) (Lepidoptera: Geometridae), was made using home made sticky delta traps baited with pheromone caps purchased from “CSALOMON®” (Plant Protection Institute, Hungary, Budapest). The monitoring was conducted in alfalfa fields in Plovdiv, Pazardjik and Sofia regions in Bulgaria during 2007–2009. The flight of I. arenacearia at the investigated sites started during April and lasted until the end of August — middle of September. Two relatively well-defined peaks indicating two generations were recorded in Sofia region. Thus the flight period of the pest was defined more accurately than previously recorded and proved to be significantly longer than was known for this country. Pheromone baits, products of “CSALOMON®” (Plant Protection Institute, Hungary, Budapest), are potent and very species specific tool for detecting the presence of, and seasonal monitoring of I. arenacearia .

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The Lucerne longicorn, Plagionotus (Echinocerus) floralis (Pallas) is a pest on alfalfa, Medicago sativa L. and several other species in the area of its distribution. Seasonal flight activity of adults of this species was studied for first time by CSALOMON® ARb3z fluorescent yellow traps with a floral attractant in alfalfa fields at three sites located in Tracian Lowland (Pazardzhik and Plovdiv) and Sofia Basin (Sofia) zoogeographical regions of Bulgaria. At all three sites P. (Echinocerus) floralis beetles were caught in relatively large numbers. Flight activity of the pest occurs over a period of about two months from the end of May (in Pazardzhik and Plovdiv) and middle of June (in Sofia) until the end of July. In Sofia (2007), the abundance of the pest in an old (5-year-old) alfalfa was significantly higher than in a young (1-year-old) alfalfa. In the untreated fields, air temperature and air humidity had no effect on beetle captures. Our investigations showed that yellow fluorescent VARb3z traps baited with floral lure can be used successfully for detection and seasonal monitoring of P. (Echinocerus) floralis . Data obtained by monitoring of the seasonal activity of adults using baited traps can be useful for forecasting and controlling outbreaks of the pest.

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