A NEW FUNGICIDAL WOUND PROTECTANT AND ITS USE ON APRICOT AND OTHER STONE FRUIT TREES

W. Berg
In the laboratories of Sandoz Lt., Basle, Switzerland, a fungicidal wound protectant for trees has been developed. This product - formerly called "Paste 6421" - is now sold under the trade name SANTAR M'/. Primary results of its use on apricot trees will be discussed in this paper.

SANTAR M is a grey, non-flowing, paint-like paste, containing 3% yellow mercuric oxide /HgO/. Because of its thixotropic properties SANTAR M can easily be applied with a stiff brush without dripping or running off the treated surfaces. Being watermiscible, wet SANTAR M can be readily removed from the brush, contaminated clothes or hands with water. After application SANTAR M dries up quickly, becoming waterinsoluble and forming over the wound a tenacious, durable and waterproof seal, adhering firmly to the plant tissue. The time required for drying varies between 20 and 40 minutes, depending upon the humidity of the wood and air. Even before being completely dry, the cover is sufficiently rainfast. Normally moist wood surface, e.g. fresh pruning cuts, can be treated and even during a drizzling rain the work has not to be discontinued. Very wet wood surfaces, however, do not take up enough of the paste. Aged coatings of SANTAR M will resist to weathering for at least one season. During this time the layer neither washes off nor flakes, in contrast to other examined wound dressings. When callusing of the wound begins, the coating becomes locally broken through by the new tissue. Heavy gum exudation may also disrupt the layer, as it is the case with other wound protectants and grafting wax. SANTAR M

Berg, W. (1969). A NEW FUNGICIDAL WOUND PROTECTANT AND ITS USE ON APRICOT AND OTHER STONE FRUIT TREES. Acta Hortic. 12, 181-230
DOI: 10.17660/ActaHortic.1969.12.7
https://doi.org/10.17660/ActaHortic.1969.12.7