. Elementary principles of agriculture; a text book for the common schools. The *brown rot of plums andpeaches leaves mummies on Fig. 92. Black rot ox grape may be pre-vented by timely use of Bordeauxmixture vitriol) known as Bor-deaux mixture (given inthe Appendix) is mostoften used. The plants aresprayed with a very dilutesolution, so that a thinfilm of the poison coversthe leaves, stems, buds,and fruit of the on the surface ofthoroughly sprayed plantsare killed, as likewiseothers that fall on theplants. It is often neces-sary to make several ap-plications, to
. Elementary principles of agriculture; a text book for the common schools. The *brown rot of plums andpeaches leaves mummies on Fig. 92. Black rot ox grape may be pre-vented by timely use of Bordeauxmixture vitriol) known as Bor-deaux mixture (given inthe Appendix) is mostoften used. The plants aresprayed with a very dilutesolution, so that a thinfilm of the poison coversthe leaves, stems, buds,and fruit of the on the surface ofthoroughly sprayed plantsare killed, as likewiseothers that fall on theplants. It is often neces-sary to make several ap-plications, to replace thefilm of spray washedaway by rains. Sulphur,formaldehyde, and othersubstances, are used forspecial diseases. 220. General Methodsin Using Sprays. Whereefforts are made to pre-vent the attacks of fungiby sprays, it is importantto know how and wheninfection takes place. Nogeneral rules can be time and manner ofapplying the fungicidemust be suited to theconditions peculiar to the Fungus Diseases of Plants 153 disease. The agricultural experiment station bulletinsand special books on spraying will supply full informa-tion. 2
Size: 1372px × 1821px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
