תפריט נגישות
ניגודיות עדינהניגודיות גבוהה
מונוכרום
הדגשת קישורים
חסימת אנימציה
פונט קריא
סגור
איפוס הגדרות נגישות
להורדת מודול נגישות חינם תפריט נגישותניגודיות עדינהניגודיות גבוההמונוכרוםהדגשת קישוריםחסימת אנימציהפונט קריאסגוראיפוס הגדרות נגישותלהורדת מודול נגישות חינםLevi-Zada, A.,
Steiner, S.,
Ben-Aziz, O.,
Protasov, A.,
Fefer, D.,
Kaspi, R.
The spherical mealybug, Nipaecoccus viridis (Hemiptera: Pseudococcidae), is a major global pest causing feeding damage to leaves and fruits of citrus varieties, soybean, mango, pomegranate, and grapevines. Females of the mealybug release a sex pheromone that was identified recently as a mixture of γ-necrodyl isobutyrate and γ-necrodol. The identification required synthesis based on a natural source of trans-α-necrodol, of unknown chirality, obtained from essential oil of Spanish lavender, Lavandula luisieri. To determine the chirality of the sex pheromone, here, we synthesize the γ-necrodyl acetate enriched in (+)-(S)-enantiomer and separate the enantiomers using a lipase enzyme. We confirm that the natural components, both in the mealybug and in the lavender essential oil, consist of (-)-(R)-enantiomers. Bioassays conducted in the lab and field show that males are attracted to (-)-(R)-γ-necrodyl isobutyrate alone.
Levi-Zada, A.,
Steiner, S.,
Ben-Aziz, O.,
Protasov, A.,
Fefer, D.,
Kaspi, R.
The spherical mealybug, Nipaecoccus viridis (Hemiptera: Pseudococcidae), is a major global pest causing feeding damage to leaves and fruits of citrus varieties, soybean, mango, pomegranate, and grapevines. Females of the mealybug release a sex pheromone that was identified recently as a mixture of γ-necrodyl isobutyrate and γ-necrodol. The identification required synthesis based on a natural source of trans-α-necrodol, of unknown chirality, obtained from essential oil of Spanish lavender, Lavandula luisieri. To determine the chirality of the sex pheromone, here, we synthesize the γ-necrodyl acetate enriched in (+)-(S)-enantiomer and separate the enantiomers using a lipase enzyme. We confirm that the natural components, both in the mealybug and in the lavender essential oil, consist of (-)-(R)-enantiomers. Bioassays conducted in the lab and field show that males are attracted to (-)-(R)-γ-necrodyl isobutyrate alone.
