Manual Of Tree Diseases (1918)

Overview

Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free.
This is an OCR edition with typos.
Excerpt from book:
CHAPTER III BODY AND BRANCH DISEASES AND INJURIES Many diseases and injuries of the bark and wood are more or less common to all kinds of trees. Extremes of temperature, lightning, mistletoes, lichens and some species of fungi are...
See more details below
Paperback
$26.63
BN.com price
(Save 9%)$29.56 List Price
Sending request ...

Overview

Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free.
This is an OCR edition with typos.
Excerpt from book:
CHAPTER III BODY AND BRANCH DISEASES AND INJURIES Many diseases and injuries of the bark and wood are more or less common to all kinds of trees. Extremes of temperature, lightning, mistletoes, lichens and some species of fungi are some of the causal agents which affect trees in general. As in the case of the diseases and injuries common to the seedlings and leaves of many kinds of trees, the primary causal agents of the diseases affecting bark and wood are often difficult to determine. It is only by a careful analysis of the conditions surrounding the tree in question and by close ob- ' servation of other trees in the vicinity that clues can be obtained. Also, in such cases, the knowledge of similar tree troubles may be essential in determining the exact cause. Many of the diseases and injuries of the branches and trunk affect the appearance of the leaves before direct attention is called to the primary injury. In general, the presence or absence of fruiting-bodies of fungi on the bark is of but little value in determining whether or not the trouble is caused by a specific fungus. This is due to the fact that numerous species of fungi find excellent conditions for growth in dead bark and some species follow very closely any injuries to the bark. A trained pathologist must be closely observant to assert even tentatively that a fungus found on dead areas of bark is responsible for the lesion. The only sure way of proving the fungus to be the cause of disease is the usual procedure of isolating and growing the fungus in pure cultures and inoculating it into healthy plants. Often, however, an active patho- gene shows characteristic parasitic tendencies, especially to the trained eye, which make diagnosis more certain. A comparison of the edge of a canker on chestnut caused by E...
Read More Show Less

Product Details

  • ISBN-13: 9781164940791
  • Publisher: Kessinger Publishing Company
  • Publication date: 9/10/2010
  • Pages: 430
  • Product dimensions: 9.00 (w) x 6.00 (h) x 0.87 (d)

Read an Excerpt


CHAPTER III BODY AND BRANCH DISEASES AND INJURIES Many diseases and injuries of the bark and wood are more or less common to all kinds of trees. Extremes of temperature, lightning, mistletoes, lichens and some species of fungi are some of the causal agents which affect trees in general. As in the case of the diseases and injuries common to the seedlings and leaves of many kinds of trees, the primary causal agents of the diseases affecting bark and wood are often difficult to determine. It is only by a careful analysis of the conditions surrounding the tree in question and by close ob- ' servation of other trees in the vicinity that clues can be obtained. Also, in such cases, the knowledge of similar tree troubles may be essential in determining the exact cause. Many of the diseases and injuries of the branches and trunk affect the appearance of the leaves before direct attention is called to the primary injury. In general, the presence or absence of fruiting-bodies of fungi on the bark is of but little value in determining whether or not the trouble is caused by a specific fungus. This is due to the fact that numerous species of fungi find excellent conditions for growth in dead bark and some species follow very closely any injuries to the bark. A trained pathologist must be closely observant to assert even tentatively that a fungus found on dead areas of bark is responsible for the lesion. The only sure way of proving the fungus to be the cause of disease is the usual procedure of isolating and growing the fungus in pure cultures and inoculating it into healthy plants. Often, however, an active patho- gene shows characteristic parasitic tendencies, especially to the trained eye,which make diagnosis more certain. A comparison of the edge of a canker on chestnut caused by E...
Read More Show Less

Customer Reviews

Be the first to write a review
( 0 )
Rating Distribution

5 Star

(0)

4 Star

(0)

3 Star

(0)

2 Star

(0)

1 Star

(0)

Your Rating:

Your Name: Create a Pen Name or

Barnes & Noble.com Review Rules

Our reader reviews allow you to share your comments on titles you liked, or didn't, with others. By submitting an online review, you are representing to Barnes & Noble.com that all information contained in your review is original and accurate in all respects, and that the submission of such content by you and the posting of such content by Barnes & Noble.com does not and will not violate the rights of any third party. Please follow the rules below to help ensure that your review can be posted.

Reviews by Our Customers Under the Age of 13

We highly value and respect everyone's opinion concerning the titles we offer. However, we cannot allow persons under the age of 13 to have accounts at BN.com or to post customer reviews. Please see our Terms of Use for more details.

What to exclude from your review:

Please do not write about reviews, commentary, or information posted on the product page. If you see any errors in the information on the product page, please send us an email.

Reviews should not contain any of the following:

  • - HTML tags, profanity, obscenities, vulgarities, or comments that defame anyone
  • - Time-sensitive information such as tour dates, signings, lectures, etc.
  • - Single-word reviews. Other people will read your review to discover why you liked or didn't like the title. Be descriptive.
  • - Comments focusing on the author or that may ruin the ending for others
  • - Phone numbers, addresses, URLs
  • - Pricing and availability information or alternative ordering information
  • - Advertisements or commercial solicitation

Reminder:

  • - By submitting a review, you grant to Barnes & Noble.com and its sublicensees the royalty-free, perpetual, irrevocable right and license to use the review in accordance with the Barnes & Noble.com Terms of Use.
  • - Barnes & Noble.com reserves the right not to post any review -- particularly those that do not follow the terms and conditions of these Rules. Barnes & Noble.com also reserves the right to remove any review at any time without notice.
  • - See Terms of Use for other conditions and disclaimers.
Search for Products You'd Like to Recommend

Recommend other products that relate to your review. Just search for them below and share!

Create a Pen Name

Your Pen Name is your unique identity on BN.com. It will appear on the reviews you write and other website activities. Your Pen Name cannot be edited, changed or deleted once submitted.

 
Your Pen Name can be any combination of alphanumeric characters (plus - and _), and must be at least two characters long.

Continue Anonymously

    If you find inappropriate content, please report it to Barnes & Noble
    Why is this product inappropriate?
    Comments (optional)