Book/Printed Material The relation of the health of the host and other factors to infection of Apium graveoleus by Septoria appii
-
Image 1 of The relation of the health of the host and other factors to infection … SB 608 .C39 T5 Copy 1 CONTRIBUTION FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY THE RELATION OF THE HEALTH OF THE HOST AND OTHER FACTORS TO INFECTION OF APIUM GRAVEOLENS BY…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 2 of The relation of the health of the host and other factors to infection …- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 3 of The relation of the health of the host and other factors to infection … CONTRIBUTION FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY THE RELATION OF THE HEALTH OF THE HOST AND OTHER FACTORS TO INFECTION OF APIUM GRAVEOLENS BY SEPTORIA API! H. E. THOMAS SUBMITTED…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 4 of The relation of the health of the host and other factors to infection … I Gift ^Diversity MM is is$i- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 5 of The relation of the health of the host and other factors to infection … [From the Bulletin op the Torrky Botanical Club, 48: 1-29. 20 Ja 1920.] V5 The relation of the health of the host and other factors to infection of Apium graveolens by Septoria…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 6 of The relation of the health of the host and other factors to infection … 2 Thomas: Infection of Apium graveolens adapted to the living host, having completely lost the ability to grow on dead tissue even that of its most common host. In the more highly…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 7 of The relation of the health of the host and other factors to infection … Thomas: Infection of Apium graveolens 3 Duggar and Bailey (10), Clinton (5 p. 267), and Link and Gard- ner (19) have observed that both celery and celeriac are attacked by Septoria in…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 8 of The relation of the health of the host and other factors to infection … 4 Thomas: Infection of Apium graveolens ments with celery in the greenhouse, where the health of the host was altered by various experimentally controlled conditions. Each set of plants was accompanied by…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 9 of The relation of the health of the host and other factors to infection … Thomas: Infection of Apium graveolens 5 fungus in America expresses uncertainty as to the identity of the species but includes a description of the fungus and states that if it is a…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 10 of The relation of the health of the host and other factors to infection … 6 Thomas: Infection of Apium graveolens layers with fragments of leaf cells mingled with the mycelium of the fungus making up the spot. Pycnidia begin to form before the tissue breaks down,…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 11 of The relation of the health of the host and other factors to infection … Thomas: Infection of Apium graveolens 7 On the seed the fungus does not produce a definite spot. The pycnidium is found imbedded in the pericarp with only a small spreading of the…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 12 of The relation of the health of the host and other factors to infection … Thomas: Infection of Apium graveolens ized in its choice of a host by inoculating plants from the following groups (a) plants of the family Umbelliferae, including varieties of celery; (6) miscellaneous plants,…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 13 of The relation of the health of the host and other factors to infection … Thomas: Infection of Apium graveolens 9 greenhouse. The season was favorable for vigorous development of the fungus and as a result the spots soon ran together and caused the collapse of the…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 14 of The relation of the health of the host and other factors to infection … 10 Thomas: Infection of Apium graveolens plants. Whether there are other strains of the fungus which in- fect both celery and parsley is a question of interest, both theoret- ically and practically,…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 15 of The relation of the health of the host and other factors to infection … Thomas: Infection of Apium graveolens 11 to modify these conditions in celery plants by various methods of feeding and handling to determine the influence of such treatment upon the interaction of host…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 16 of The relation of the health of the host and other factors to infection … 12 Thomas: Infection of Apium graveolens tively dry atmosphere until the infection had largely been thrown off. They were again inoculated July 10, nine weeks after the first inoculation. The results of…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 17 of The relation of the health of the host and other factors to infection … Thomas: Infection of Apium graveolens 13 Ten plants received each ioo c.c. of this solution. Two other sets of ten plants were treated respectively with nitrates and phosphates equivalent to the amounts…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 18 of The relation of the health of the host and other factors to infection … 14 Thomas: Infection of Apium graveolens ment of the fungus than the greenhouse conditions. However, the fact that a single leaf in the field bears more infections than any count obtained on…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 19 of The relation of the health of the host and other factors to infection … Thomas: Infection of Apium graveolens 15 TABLE V Comparison of the number and si-e of spots on plants treated with sodium nitrate and hydrated lime. notes taken twenty days after inoculation Treat-…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 20 of The relation of the health of the host and other factors to infection … 16 Thomas: Infection of Apium graveolens full with heavily diseased leaves and petioles of celery. Five pots were similarly filled with healthy green leaves. Celery plants were potted in garden soil in…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 21 of The relation of the health of the host and other factors to infection … Thomas: Infection of Apium graveolens 17 TABLE VII Reduction in number of spots produced by Septoria on plants infested by nematodes Infested by nematodes Not infested g. _ Variety Z V C…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 22 of The relation of the health of the host and other factors to infection … IS Thomas: Infection of Apium graveolens Infection of etiolated plants The effect of etiolation of the host upon infection has been tested in various ways. The first series of plants were kept…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 23 of The relation of the health of the host and other factors to infection … Thomas: Infection of Apium graveolens 19 that the time* required for the first appearance of the spots was practically identical for the etiolated and control plants. A third set of plants was…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 24 of The relation of the health of the host and other factors to infection … 20 Thomas: Infection of Apium graveolens ten spots per leaf were measured. Thus for a plant of five leaves fifty spots were measured. In the case of the first series kept in…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 25 of The relation of the health of the host and other factors to infection … Thomas: Infection of Apium graveolens 21 a second record five days after the first showed an average increase of fifteen spots per plant on the plants of the lower temperture. One set…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 26 of The relation of the health of the host and other factors to infection … 22 Thomas: Infection of Apium graveolens w x H H c/i Z W s Q O W S w 5 S3 O w c Yellowed, drying Yellowing Yellowing slightly Green O i/i…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 27 of The relation of the health of the host and other factors to infection … Thomas: Infection of Apium graveolens 23 of different ages in relation to fungus invasion is found in the rate of breaking down of the leaf tissue after infection becomes established. Except in…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 28 of The relation of the health of the host and other factors to infection … 24 Thomas: Infection of Apium graveolens sodium hydrate solution. A very marked increase in acidity was thus shown for the old leaves. The ratio of the readings for young and old leaves…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 29 of The relation of the health of the host and other factors to infection … Thomas: Infection of Apium graveolens 25 established and the size of the spots produced. On the other hand top dressing the soil of pots with lime decreases the infection. Also the infestation…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 30 of The relation of the health of the host and other factors to infection … 26 Thomas: Infection of Apium graveonens antagonistic throughout but may on the contrary become special- ized in such a way that infection and the development of the typical symptoms of the disease…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 31 of The relation of the health of the host and other factors to infection … Thomas: Infection of Apium graveolens 27 is unable to develop on a living host as nearly related to celery as is parsley. The comparatively narrow specialization of the Septoria on celery suggests…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 32 of The relation of the health of the host and other factors to infection … 28 Thomas: Infection of Apium graveolens 13- Murray, T. J. Angular-leaf spot of tobacco, an undescribed bacterial disease. Jour. Agr. Research 16: 219-228. pi. 2$-2j. 1919. 14. Howitt, J. E. Experiments to…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 33 of The relation of the health of the host and other factors to infection … Thomas: Infection of Apium graveolens 29 31. Rogers, S. S. The late blight of celery. California Agr. Exp. Sta. Bull. 208: 83-115./. 1-17. 1911. 32. Rolfs, P. H. Subtropical vegetable gardening. New…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 34 of The relation of the health of the host and other factors to infection …- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 35 of The relation of the health of the host and other factors to infection …- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 36 of The relation of the health of the host and other factors to infection …- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 37 of The relation of the health of the host and other factors to infection … HARVEY EARL THOMAS Born November 18, 1890, at Grant, Virginia; graduated Acad- emy of Idaho, 191 1; Bachelor of Science, Virginia Polytechnic In- stitute, 191 5; Master of Science, Virginia Polytechnic Institute,…- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 38 of The relation of the health of the host and other factors to infection …- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 39 of The relation of the health of the host and other factors to infection …- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
-
Image 40 of The relation of the health of the host and other factors to infection … LIBRARY OF CONGRESS lllll 111 Hi III! Illl llll 1 111. Illlll Hill 002 810 856 4- Contributor: Thomas, H. Earl (Harvey Earl)
- Date: 1921
About this Item
Title
- The relation of the health of the host and other factors to infection of Apium graveoleus by Septoria appii
Names
- Thomas, H. Earl (Harvey Earl), 1890-1974.
Created / Published
- New York, 1921.
Headings
- - Celery--Diseases and pests
- - Septoria
Notes
- - Also available in digital form.
Medium
- 1 p.l., 29 p., 1 l. 24 cm.
Call Number/Physical Location
- SB608.C39 T5
Library of Congress Control Number
- 21005675
Online Format
- online text
- image