Infection and Immunity in Apple Rust Technical Bulletin Ben Davis Apples Showing Rust Infection, 1918: Note, Variations in Color, Location, and Shape of Lesions (Classic Reprint)

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9781332077373: Infection and Immunity in Apple Rust Technical Bulletin Ben Davis Apples Showing Rust Infection, 1918: Note, Variations in Color, Location, and Shape of Lesions (Classic Reprint)
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Excerpt from Infection and Immunity in Apple Rust Technical Bulletin Ben Davis Apples Showing Rust Infection, 1918: Note, Variations in Color, Location, and Shape of Lesions

York Imperial apple leaves are usually susceptible to rust for from fifteen to twenty-five days after they unroll from the bud.

The length of this period of susceptibility seems to be closely associated with growth conditions.

The associated chemical changes are worthy of further study.

Infection data based on periods of rainfall, gelatinization of sori, or discharge of sporidia mean but little unless definite proof is at hand to show that infection did actually take place, since abundant sporidia discharge has been observed without resultant infection.

Sporidia are not discharged in appreciable numbers at a temperature below 50°F.(10°C).

Under optimum conditions there may be fairly abundant sporidia discharge in less than three hours after first moistening a mature sorus.

Slight evaporation apparently favors sporidia discharge.

The greatest injury to apple trees is evidently due to foliage infection. A severe rust infection results in deformed fruit, a general reduction in size of fruit, and great loss of vigor on the part of the tree.

There is a very distinct relationship between the number of rust spots on a York Imperial apple leaf and the length of time the leaf is retained by the tree.

The effect of a severe rust infection may apparently persist for more than one season.

A large percentage of the fruit may show rust if the infection occurs at about the time the blossoms fall.

There is a marked variation in the susceptibility of red cedar trees to this disease.

Apple rust may be controlled by the use of sprays, but this method is entirely impractical in commercial orchards.

Destruction of cedars around susceptible orchards is effective as a control measure, but the cedar-free area should be at least two miles around the orchard if consistently good results are to be secured.

The cost of clearing land of red cedars has not been found excessive under West Virginia conditions.

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Book Description Forgotten Books, United States, 2018. Paperback. Condition: New. Language: English . Brand New Book ***** Print on Demand *****. Excerpt from Infection and Immunity in Apple Rust Technical Bulletin Ben Davis Apples Showing Rust Infection, 1918: Note, Variations in Color, Location, and Shape of Lesions The effect of a severe rust infection may apparently persist for more than one season. A large percentage of the fruit may show rust if the infection occurs at about the time the blossoms fall. There is a marked variation in the susceptibility of red cedar trees to this disease. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works. Seller Inventory # APC9781332077373

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Book Description Forgotten Books, United States, 2018. Paperback. Condition: New. Language: English . Brand New Book ***** Print on Demand *****.Excerpt from Infection and Immunity in Apple Rust Technical Bulletin Ben Davis Apples Showing Rust Infection, 1918: Note, Variations in Color, Location, and Shape of Lesions The effect of a severe rust infection may apparently persist for more than one season. A large percentage of the fruit may show rust if the infection occurs at about the time the blossoms fall. There is a marked variation in the susceptibility of red cedar trees to this disease. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works. Seller Inventory # APC9781332077373

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Book Description Forgotten Books, United States, 2018. Paperback. Condition: New. Language: English . This book usually ship within 10-15 business days and we will endeavor to dispatch orders quicker than this where possible. Brand New Book. Excerpt from Infection and Immunity in Apple Rust Technical Bulletin Ben Davis Apples Showing Rust Infection, 1918: Note, Variations in Color, Location, and Shape of Lesions The effect of a severe rust infection may apparently persist for more than one season. A large percentage of the fruit may show rust if the infection occurs at about the time the blossoms fall. There is a marked variation in the susceptibility of red cedar trees to this disease. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works. Seller Inventory # LIE9781332077373

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