TY - JOUR

T1 - Multichemical defense of plant bug Hotea gambiae (Westwood) (Heteroptera Scutelleridae)

T2 - (E)-2-hexenol from abdominal gland in adults

AU - Hamilton, J. G.C.

AU - Gough, A. J.E.

AU - Staddon, B. W.

AU - Games, D. E.

PY - 1985/10/1

Y1 - 1985/10/1

N2 - The occurrence in Hotea gambia adults of a sexual dimorphism in the divided dorsal abdominal scent gland (dg 1)is reported. Counts made of ducted secretory units indicate that female dg 1 regresses at the end of larval development, unlike male dg 1 which undergoes no regression. Other dorsal abdominal scent glands (dg 2, dg 3) which function in the larvae cease to function during the imaginai moult. From gas chromatographic, mass spectrometric and [1H]NMR data, the identity of the secretion from male adult dg 1 was established as virtually pure (E)-2-hexenol (a 100-mg mature male adult contains 0.5-1 μl of secretion). 2-Hexenol was also found in the reduced female adult dg 1. In the sexually monomorphic metathoracic scent gland, (E)-2-alkenals (C6, C8) and (E)-4-oxohex-2-enal, together with monoterpenes (β-pinene, limonene) but not 2-hexenol, were identified. The vapor of (E)-2-hexenol is repellent to both sexes of Hotea adults and toxic to blowfly (Calliphora) eggs.

AB - The occurrence in Hotea gambia adults of a sexual dimorphism in the divided dorsal abdominal scent gland (dg 1)is reported. Counts made of ducted secretory units indicate that female dg 1 regresses at the end of larval development, unlike male dg 1 which undergoes no regression. Other dorsal abdominal scent glands (dg 2, dg 3) which function in the larvae cease to function during the imaginai moult. From gas chromatographic, mass spectrometric and [1H]NMR data, the identity of the secretion from male adult dg 1 was established as virtually pure (E)-2-hexenol (a 100-mg mature male adult contains 0.5-1 μl of secretion). 2-Hexenol was also found in the reduced female adult dg 1. In the sexually monomorphic metathoracic scent gland, (E)-2-alkenals (C6, C8) and (E)-4-oxohex-2-enal, together with monoterpenes (β-pinene, limonene) but not 2-hexenol, were identified. The vapor of (E)-2-hexenol is repellent to both sexes of Hotea adults and toxic to blowfly (Calliphora) eggs.

KW - β-pinene

KW - (E)-2-hexenol

KW - 4-oxohex-2-enal

KW - Calliphora

KW - Calliphoridae

KW - defensive secretion

KW - Diptera

KW - feeding

KW - Heteroptera

KW - hex-2-enal

KW - Hotea gambiae

KW - limonene

KW - oct-2-enal

KW - ovicide

KW - pheromone

KW - repellent

KW - Scent gland

KW - Scutelleridae

KW - sex dimorphism

U2 - 10.1007/BF01012140

DO - 10.1007/BF01012140

M3 - Journal article

AN - SCOPUS:0000547788

VL - 11

SP - 1399

EP - 1409

JO - Journal of Chemical Ecology

JF - Journal of Chemical Ecology

SN - 0098-0331

IS - 10

ER -