Hilgardia
Hilgardia
Hilgardia
University of California
Hilgardia

Temperature relations of powdery mildews

Authors

C. E. Yarwood
Soliman Sidky
Morris Cohen
Vincent Santilli

Authors Affiliations

Mr. Yarwood is Professor of Plant Pathology and Plant Pathologist in the Experiment Station, Berkeley; Mr. Sidky is Plant Pathologist, Ministry of Agriculture, Cairo, Egypt; Mr. Cohen is Research Associate in Botany, Los Angeles; Mr. Santilli was a Graduate Assistant in Plant Pathology at the time of these studies.

Publication Information

Hilgardia 22(17):603-622. DOI:10.3733/hilg.v22n17p603. March 1954.

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Abstract

The optimum temperature for powdery mildews (Erysiphaceae) as a group is about 21° C, or 4 degrees lower than the average optimum for plant pathogens. Among the powdery mildews the optima for different species are about as follows: Erysiphe graminis, 17° C; E. polygoni, 23°; E. cichoracearum, 22°; Sphaerotheca pannosa, 24°; Uncinula necator, 26°; and Podosphaera leucotricha, 16°. The five criteria of fungus activity used to assay the relation of temperature to powdery-mildew development—number of conidia per conidiophore, rate of maturation of conidia, percentage germination of conidia, length of germ tubes in vitro, disease development, and length of hyphae in vivo—are considered to be of increasing merit in the order given.

Powdery-mildew conidia are shorter-lived than the spores of most fungi: they live only about 2 days in ordinary environments. At lower and higher temperatures they live for longer and shorter times, respectively. Attached spores in situ live longer than detached spores on glass. Fresh conidia on the host surface are more tolerant of high temperature than are the young colonies resulting from the growth of these conidia.

Literature Cited

Anonymous. [Grape mildew]. Gard. Chron. [London]. 1853, 1855. 13:740 15: 532, 693-94. Anonymous

Anonymous. [Control of grape powdery mildew with hot water]. Gard. Chron. ser. 3. 1899. 25:334-35. 383-84; 26: 14, 33, 48, 74, 94, 113, 134

Anonymous. Powdery mildew of cucumbers, pumpkins, and related plants. Agr. Gaz. N. S. W. 1950. 61:587-88.

Beeley F. Effect of meteorological factors on the virulence of Oidium Heveae in Malaya. Rubber Res. Inst. Malaya Jour. 1932. 4:104-14.

Berwith C. E. Apple powdery mildew. Phytopathology. 1936. 26:1071-73.

Bioletti F. T. Oidium or powdery mildew of the vine. California Agr. Exp. Sta. Bul. 1907. 186:315-50. https://archive.org/details/oidiumorpowderym144biol

Cherewick W. J. Studies on the biology of Erysiphe graminis DC. Canad. Jour. Res. sec. C (Canad. Jour. Bot.). 1944. 22:52-86. DOI: 10.1139/cjr44c-006 [CrossRef]

Cohen Morris, Yarwood C. E. Temperature relations of fungi as a straight line transformation. Plant Physiol. 1952. 27(3):634-38. DOI: 10.1104/pp.27.3.634 [CrossRef]

Corneli E. Temperature di germinazione di spore fungini in relazione alli infezioni sugli ospiti. (Temperatures of germination of fungal spores in relation to infection of the hosts.). Nuovo Giorn. Bot. Ital. (n.s.). 1934. 41:121-33. Abstract in: Rev. Appl. Mycol. 13: 719. 1934 DOI: 10.1080/11263503409437313 [CrossRef]

Corner E. J. H. Observations on resistance to powdery mildews. New Phytol. 1935. 34:180-200. DOI: 10.1111/j.1469-8137.1935.tb06840.x [CrossRef]

Dundas B. Inheritance of resistance to powdery mildew in beans. Hilgardia. 1936. 10:243-53. DOI: 10.3733/hilg.v10n08p241 [CrossRef]

Fischer George W. The longevity of smut spores in herbarium specimens. Phytopathology. 1936. 26:1118-27.

Gäumann E., Brierley W. B. Principles of plant infection. 1950. London, England: Crosby Lockwood. 543p. English translation by

Geiger Rudolf. Das Klima der bodennahen Luftschicht. Die Wissenschaft. 1927. 78:1-246.

Graf-Marin Alberto. Studies on powdery mildew of cereals. New York (Cornell) Agr. Exp. Sta. Mem. 1933. 157:1-48.

Hammarlund C. Zur Genetik, Biologie und Physiologie einiger Erysiphaceen. Hereditas. 1925. 6:1-126. DOI: 10.1111/j.1601-5223.1925.tb03137.x [CrossRef]

Hashioka Y. Relation of temperature and humidity to Sphaerotheca fuliginea (Schlecht.) Poll. with special reference to germination, viability, and infection. Nat. Hist. Soc. Formosa Trans. 1937. 27:129-45.

Laibach F. Über die Bedingungen der Perithezienbildung bei den Erysipheen. Jahr. f. Wiss. Bot. 1930. 72:106-36.

Levykh P. M. [The influence of temperature and air humidity on the infection of tobacco by powdery mildew, Oidium tabaci Thuem]. A. I. Mikoyan Pan-Soviet Sci. Res. Inst. Tob. and Indian Tob. Ind. (VITIM). Rostoff-on-Don, Publ. 1940. 141:97-111. Abstract in: Rev. Appl. Mycol. 20: 90. 1941

Longrée Karla. The effect of temperature and relative humidity on the powdery mildew of roses. New York (Cornell) Agr. Exp. Sta. Mem. 1939. 223:1-43.

Metzger Ilse. Versuche zur Aufbewahrung lebender Sporen von Weizen- und Gerstenmehltau. Kühn Arch. 1942. 56:163-72.

Peltier George L. A study of the environmental conditions influencing the development of stem rust in the absence of the alternate host. I. The viability of the urediniospores of Puccinia graminis tritici Form III. Nebraska Agr. Exp. Sta. Res. Bul. 1922. 22:1-15.

Pratt R. Influence of temperature on the infection of wheat by the powdery mildew, Erysiphe graminis tritici. Torrey Bot. Club Bul. 1943. 70:378-85. DOI: 10.2307/2481560 [CrossRef]

Salmon Ernest S. The strawberry mildew (Sphaerotheca Humuli (DC.) Burr). Roy. Hort. Soc. Jour. 1900. 25:132-38.

Schaffnit E. Studien über den Einfluss niederer Temperaturen auf die pflanzliche Zelle. Kaiser-Wilhelm-Inst. f. Landw. Mitt. 1910. 3:95-115.

Spaulding Perley, Rathbun-Gravatt Annie. The influence of physical factors on the viability of sporidia of Cronartium ribicola Fischer. Jour. Agr. Res. 1926. 33:397-433.

Taylor W. H. Vine culture under glass. Diseases and pests of the vine. New Zeal. Jour. Agr. 1923. 26:172-77.

Tini G. Prove di germinazione di spore di Oidium quercinum. (Germination tests of the spores of Oidium quercinum.). Riv. Pat. Veg. 1933. 23:43-45. Abstract in: Rev. Appl. Mycol. 12: 542. 1933

Togashi K. Biological characters of plant pathogens. Temperature relations. 1949. Tokyo: Meibundo. 478p.

Uppal B. N., Cheema G. S., Kamat M. N. Powdery mildew of grape and its control in Bombay. Bombay Dept. Agr. Bul. 1931. 163:1-30.

Uppal B. N., Desai M. K. Cumin powdery mildew in Bombay. Bombay Dept. Agr. Bul. 1933. 169:1-16.

Uppal B. N., Patel M. K., Kamat M. N. Pea powdery mildew in Bombay. Bombay Dept. Agr. Bul. 1935. 177:1-12.

Uppal B. N., Patel M. K., Kamat M. N. Powdery mildew of the mango. Bombay Univ. Jour. 1941. 9(5):12-16.

Voglino P. Contribuzione allo studio della Phyllactinia corylea (Pers.) Karst. Nuovo Giorn. Bot. Ital. 1905. 12:313-27.

Wolf F. A., Dixon L. F., McLean Ruth, Darkis F. R. Downy mildew of tobacco. Phytopathology. 1934. 24:337-63.

Woodward R. C. Studies on Podosphaera leucotricha (Ell. and Ev.) Salm. I. The mode of perennation. Brit. Mycol. Soc. Trans. 1927. 12:173-204. DOI: 10.1016/S0007-1536(27)80014-8 [CrossRef]

Yarwood C. E. The diurnal cycle of the powdery mildew Erysiphe polygoni. Jour. Agr. Res. 1936. 52:645-57.

Yarwood C. E. Detached leaf culture. Bot. Rev. 1946. 12:1-56. DOI: 10.1007/BF02861321 [CrossRef]

Yarwood C. E. Water content of fungus spores. Amer. Jour. Bot. 1950. 37:636-39. DOI: 10.2307/2437874 [CrossRef]

Yossifovitch Mladen. Contribution à Pétude de l’Oïdium de la vigne et de son traitement 1923. Thèse Doct. Univ. Toulouse, France. Abstract in: Soc. Bot. de France Bul. 70: 574. 1923

Yarwood C, Sidky S, Cohen M, Santilli V. 1954. Temperature relations of powdery mildews. Hilgardia 22(17):603-622. DOI:10.3733/hilg.v22n17p603
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