Paris Green for the Codling-Moth (Classic Reprint) - Couverture souple

Woodworth, C. W.

Couverture souple

ISBN 10 : 0260439460 ISBN 13 : 9780260439468

Editeur : Forgotten Books, 2018

Synopsis

Excerpt from Paris Green for the Codling-Moth

Pure Paris green will dissolve wholly in ammonia (p. It will make a green streak on glass (p. And consists of green spheres, as seen under the microscope (p. The latter is the best test, but chemical ysis is neces sary to determine the grade, and. The presence of soluble white arsenic or arsenites (p. Freedom from soluble arsenical compounds and a known grade are essential in a spraying material (p. Laws have so far failed to recognize this (p. And better standards are essential (p. The Uni versity of California will condemn all samples of Paris green that are not pure (as s'hown by the microscope), or if they contain water-soluble arsenical compounds, or if they fall below fifty per cent of arsenious oxid (p.

Under the present circumstances the use of substitutes for Paris green is recommended (p. These can be obtained ready-made, in considerable variety, but there is no that their quality will be maintained (p. Home-made articles are the cheapest, are easily made, and have been quite thoroughly tested (p. But they require more care in handling because of the danger of poisoning (p.

Other remedies for the codling-m'oth have been tried, and, under some circumstances, might be used to supplement spraying (p. Such as the use of bands (p. Destruction of windfalls (p. Destruction of moths in fruit-houses (p. And traps (p. While others, like winter spraying, are useless (p. Mistakes, often made, which should be avoided are as fol lows: Too few applications (p. Lack of uniformity (p. And failure to appreciate difference of location (p. 29) and season (p. The codling-moth can be fought effectively (p. The correct practice is that which brings the best return for time and money invested in treatment (p. Th1s will vary with locality and season, and therefore requires intelligent considera tion of conditions (p. And finally the spraying must be thoroughly and carefully done (p.

Détails de l'édition

• Éditeur: Forgotten Books
• Date d'édition: 2018
• Langue: anglais
• ISBN 10: 0260439460
• ISBN 13: 9780260439468
• Reliure: Broché
• Nombre de pages: 46
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