Vol. 10 No: 1

Title:
Further Observations on the Habits of the Raspberry Beetle (Byturus Tomentosus Fabr.) with Special Reference to the Control of the Pest by Means of Derris.

Author:
W. STEER

pp: 1-18

Abstract:
A study of the life history and habits of the Raspberry and Loganberry Beetle (Byturus tomentosus Fabr.) was begun in August, 1927, with a view to finding a stage at which the pest might most effectively and economically be attacked. Reference has been made in a previous report (7) to promising indications obtained with a double spraying method of control based on a consideration of the larval habits.

Following Lees' attempts to control this beetle in 1917 (2) with a paraffin-nicotine-soap emulsion used against the adults, and in 1919 (3) with various methods of cultivation, Lees and Peren (4, 5, 6) found that they could reduce the infestation by three sprayings of lead arsenate during the blossoming period. The applications were made in their 1921 and 1922 trials when approximately one-third, two-thirds, and all the blossoms were fully open, and resulted in a reduction of the infestation by about three-quarters.

More recently Walton (II, 12) has obtained excellent results three . . .

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