ST1'I)IES 0s THE INSECT FAUNA ON SCOTCH BROOM
125
April
M y
June
July
Augu51
September Oclober
FIG. 4. Total Acyrtfocliphon 8parlia' in sumples of broom, 1956 (from Smith, B. I). (1906).
J . Aninc. Ewl. 35. 255-207).
30
24 1
10 17 26
.March
Aprrl
May
June
July
FIQ. 5. Total Acy?IAo&ipkon 8poftii in earnplea of broom, 1967 (from Smith, B. D. (1966).
J . Anim. Ecol. S5, 25rt-267).
then fell off rapidly and remained at a comparatively low level for
the Yest of the season. Sexual forms were produced from the end of
September onwards mid oviposition continued well into November.
2. &fled of plunt alkaloid Spurteilze on the distribution of Acyrthosiphon
(Smith, 1966h)
Smith points out that although it is generally known tthat host selection in aphids owurn mainly after alightment, little is known about the
125
April
M y
June
July
Augu51
September Oclober
FIG. 4. Total Acyrtfocliphon 8parlia' in sumples of broom, 1956 (from Smith, B. I). (1906).
J . Aninc. Ewl. 35. 255-207).
30
24 1
10 17 26
.March
Aprrl
May
June
July
FIQ. 5. Total Acy?IAo&ipkon 8poftii in earnplea of broom, 1967 (from Smith, B. D. (1966).
J . Anim. Ecol. S5, 25rt-267).
then fell off rapidly and remained at a comparatively low level for
the Yest of the season. Sexual forms were produced from the end of
September onwards mid oviposition continued well into November.
2. &fled of plunt alkaloid Spurteilze on the distribution of Acyrthosiphon
(Smith, 1966h)
Smith points out that although it is generally known tthat host selection in aphids owurn mainly after alightment, little is known about the