Incidence and economic impact of the mint aphid, Eucarazzia elegans (Ferrari) (Hemiptera: Aphididae) on common sage

Abstract

A survey and laboratory experiments were conducted on incidence rates and economic impact of Eucarazzia elegans (Ferrari) (Hemiptera: Aphididae) in Salvia officinalis L. (Lamiaceae). The investigations were purposively performed on conventionally grown common sage in Bornova and Menemen, Izmir-Turkey. Experiments were set up with zero, normal and double population densities of the aphid. The corresponding treatments 0 (no exposure), 2, 4, 6, 8, 10 and 12 weeks (complete exposure) were used for evaluating economic impact. Eucarazzia elegans infested old leaves with an incidence rate of 9.5% in the early spring and then migrated to young leaves and blossom at the beginning of the summer with the incidence rate of 1.1%. The seasonal distribution of the aphid was affected more by temperature than humidity and rainfall. Although the aphid infestation had no differences on the quantity of the essential oil, some of the essential oil components were markedly different from the control. The total plant weights (fresh and dry) with the normal and double infestation rate were decreased about a third and more than a half compared to the control, respectively. Aphids feeding on common sage beyond 8-10 weeks caused more than 50% yield loss. The highest cost-benefit ratio was achieved in plots where six insecticide applications were made.

Mealybugs complex of citrus in Bengkulu Province

“…Meanwhile, at an altitude of >800 m above sea level, the rainfall is quite high, causing less growth of mealybugs and resulting in lower abundance of mealybugs. The meteorological factors were abiotic factors that influence the development of insect populations [21]. Meteorological factors such as temperature, rainfall, and relative humidity greatly affect the population explosion.…”

Diversité des pucerons et de leurs ennemis naturels en cultures sous serre à Tizi-Ouzou, Algérie

“…La première observation a été réalisée par Benoufella-Kitous et Medjdoub (2016) dans la région de Tala Amara (Tizi-Ouzou, Algérie). En Turquie, cette espèce a aussi été observée à Bornova et Menemen sur la sauge (Zarkani et al, 2017). Au Brésil, à São Carlos, elle a été signalée pour la première fois par Peronti et al (2002), sur une plante ornementale (Salvia splendens) en 1997.…”

Insect Pests Complex of Common Sage (Salvia officinalis L.) (Lamiaceae) and Their Natural Enemies

“…The aphid produces less to no honeydew that it impacts to fewer ants found in the aphid colonies. Zarkani et al (2017b) reported that the mint aphid, E. elegans population dynamic was particularly more impressed by temperature than humidity and rainfall. The aphids tend to infest old leaves and impact to excessive defoliated.…”