Effects of temperature on Acyrthosiphon pisum and Therioaphis trifolii (Hemiptera: Aphididae) abundance in alfalfa crops: A case study in northern Serbia

Populations of the most abundant alfalfa aphids, Acyrthosiphon pisum and Therioaphis trifolii, have periodic fluctuations, many factors affect their dynamics. In present study, we examined impact daily air temperatures on abundance two aphids in field conditions. The numbers these were documented at locations a representative growing area Serbia during three-year study. Based records aphid whole it was found that correlation between sum optimal for development, maximum number recorded peaks significant can therefore be considered detection suitable temperature conditions to increase abundance. study shows highest correlations high density A. its development (Ck=0.569) T. trifolii (Ck=0.595). length time required growth populations differed: 30 days 5 trifolii. association data enables projection population behavior changed future climate This suggests increased sizes decreased under warmer are expected prevail future.