THE EFFECT OF TOBACCO MOSAIC ON THE YIELD OF FIELD TOMATOES AS INFLUENCED BY SPRAYS OF MILK AND DOSS

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Abstract
An 80 per cent infection of TMV reduced early yields by 34 per cent compared with uninoculated, apparently healthy check plants evincing 18 per cent non-apparent infection. When plants were thoroughly sprayed with milk and allowed to dry prior to inoculation and pulling, transplanting was successful and convenient, virus spread was reduced by 41 per cent, and early marketable yields were increased significantly over those of unsprayed inoculated plants. Dipping tomato plants in milk, after pulling from the seed-bed and before planting in the field, reduced spread of tobacco mosaic, but caused severe wilting and subsequent death of many of the transplants. DOSS (Dioctyl sodium sulfo-succinate) was as effective as milk in reducing spread of the virus, but was less effective in sustaining early yields.

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