Comparing Soil Fungicides with Special Reference to
            <i>Phymatotrichum</i>
            Root Rot

Ezekiel, Walter N.; Taubenhaus, J. J.

doi:10.1126/science.79.2061.595

Cited by 3 publications

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“…Death usually occurs only in young seedling palms. A theory that this disease was caused by faulty nutrition was tested by 18 A list of all known affected properties is available through the California State Department of Agriculture. Since October 1, 1943, palms or their offshoots have been refused admittance into all of that portion of San Diego County east of the range line between ranges 3 and 4 east, under authority of Section 124 of the Agricultural Code.…”

Section: Discussionmentioning

confidence: 99%

“…King and Hope (33) attempted to eradicate this fungus from an area near Indio, Qalifornia, by injecting under pressure a 1~4 per cent solution of Formalin into the soil through pipes to a depth of 6 feet and at the rate of 1 gallon per cubic foot. Ezekiel and Taubenhaus (18) compared several chemicals, including certain chlorinated hydrocarbons and other volatile materials, for their relative toxicity to the cotton-root fungus and their ability to penetrate soil. When these materials were tested in the laboratory, pentaehloroethane and tetrachloroethane were the most promising.…”

Section: Hizgardiamentioning

confidence: 99%

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Omphalia root rot of the date palm

Bliss¹

1944

Hilg

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Section: Discussionmentioning

confidence: 99%

Section: Hizgardiamentioning

confidence: 99%

Omphalia root rot of the date palm

Bliss¹

1944

Hilg

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“…The jars were sealed with glass tops and rubber rings after vapor clinging about the top of the jar had been blown away and after sclerotia soaked for at least 15 minutes had been placed on small squares of cheesecloth on top of the soil. This procedure resembles that used by Ezekiel and Taubenhaus (2) in tests with Phymatotrichum.…”

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Experiments with fungicides for use againstSclerotium Rolfsiiin soils

Davey¹,

Leach²

1941

Hilg

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Verticillium Wilt of the Hop (Humulus Lupulus)*

Keyworth

1942

Annals of Applied Biology

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With Plate 10 and z Tert-figuns) V e r t z i i h wilt of hops was first recorded by Hams (1927) at Penshurst, Kent, in vars. Fuggle and Tolhurst. From 1930 onwards new outbreaks were reported in Kent, Susses and Herefordshire, and by 1937 about twelve had been identified. Vnticiuiran a b u t r u m Reinke & Berth. was isolated readily from the wood of diseased bines and from the roots and underground stem system, but no conidiophores were observed on the aerial parts of plants under field conditions. Young hop plants inoculated with the pathogen developed all the characteristic symptoms of wilt (Harris, 1936; H a r r i s & Furneaux,1938). From a study of the outbreak at Penshurst, H a r r i s (1936) concluded that V. ulboatrum was present in most of the plants in an affected field whether the bines wilt before hop picking or not, and that the intensity of attack was related primarily to fluctuations in the seasonal and soil conditions under which a particular plant was growing, the intensity of wilt being greatest in wet seasons and in wet parts of the hopfield. As a possible method of control, growers were advised to improve the drainage system in affected fields and not to plant hops on ground which had a high summer water-table caused by springs, unless the water from these could be piped away. By 1937 the disease was very severe in a number of Kentish hopfields and the writer was appointed to continue the investigations of the disease on an intensive scale. This paper deals with work begun in July 1938; preliminary observations made in 193have been described (Keyworth, 19390, a). T H E HOP PLANT AND ITS CULTIVATIONThe hop has L perennial rootstock which bears annual stems (bines). In March the stock is trimmed, and in April and May many young bines grow from buds on it; these are thinned to six or eight which grow up strings to wires stretched about 12 ft. above the hopfield. Flowers form on the lateral branches and the hops ripen ahd are picked in September. The bines then die back, leaving thickened basal podons which can be used as cuttings. Hops are planted symmetrically in various ways. The system most common in Kent is the squme plant in which the hops are planted at the corners of squires of side 61 ft., with alleys between the plants at right angles to each other, so that the ground can be cultivated in two directions. Another system is the Worcester plant in which the hops are planted 3 ft. apart in rows which are 7 ft. apart, and the alleys between the hops are cultivated in one direction only. Other systems of planting differ slightly from these, but all fall into one of two categories, those in which the ground UUL be cultivated in two directions at right angles and those in which it can be cultivated in one direction only. These symmetrical systems of planting make it possible to map hopfields to scale indicating the exact positions of diseased and normal plants : the directions of spread of the disease may bear a definite relation to the system of planting. SYMPTOMS OF THE DISEASEAffected leaves ...

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Comparing Soil Fungicides with Special Reference to Phymatotrichum Root Rot

Cited by 3 publications

References 0 publications

Omphalia root rot of the date palm

Omphalia root rot of the date palm

Experiments with fungicides for use againstSclerotium Rolfsiiin soils

Verticillium Wilt of the Hop (Humulus Lupulus)*

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