Benomyl (methyl 1-(butylcarbamoyl)-2-benzimidazolecarbamate), applied either as a soil drench or as foliar spray, was found to be an effective fungicide for control of mildew on apple leaves. its efficacy was equal to that of a mixture of 2-(1-methylheptyl)-4,6-dinitrophenol and 2(1-methylheptyl)-4,6-dinitrophenyl crotonate (Karathane) applied as a spray, but its systemic nature minimizes the need for complete coverage. it is also an effective spray chemical for control of cherry leaf spot at low concentrations and appears to have a stimulating effect on leaf size.

The design and construction of the otter board is a subject of great importance for economy in trawling. This review incorporates a historical resume tracing the change and development• of otter boards. The size of the otter board and its relationship with the horse power of the engine and size of the net and the methods of rigging are dealt with. The factors influencing the horizontal spread are discussed. The effect of the angles of attack, heel and tilt and the ground reaction on the force coefficients have been reviewed and discussed with particular reference to flat rectangular otter boards used for bottom trawling. A short account of other designs of otter boards used for improved efficiency is given. Suggestion for improving the efficacy of otter boards based on the work hitherto done has been made. The contributions relating to the various aspects of design and performance of trawl boards carried out till 1969 have been considered.