VARIATION IN THE SENSITIVITY OF ISOLATES OF VENTURIA INAEQUALIS (CKE.) WINT. TO FUNGICIDES

1961 ◽  
Vol 41 (3) ◽  
pp. 499-502 ◽  
Author(s):  
R. G. Ross ◽  
S. A. Hamlin
Keyword(s):  
Copper Sulphate ◽  
Venturia Inaequalis ◽  
Dosage Range ◽  
Mercury Acetate ◽  
Phenyl Mercury

Fifty isolates of Venturia inaequalis, from diseased apples of several varieties collected in sprayed orchards on various fungicide programs and in unsprayed orchards, were tested for their sensitivity to captan, glyodin, dichlone, phenyl mercury acetate, copper sulphate and sulphur. The isolates were sensitive to a wider dosage range of sulphur than of other fungicides but there was no indication that, in nature, V. inaequalis had developed strains resistant to the fungicides.

EFFECT OF FUNGICIDES ON McINTOSH APPLE TREES

1963 ◽  
Vol 43 (4) ◽  
pp. 497-502 ◽  
Author(s):  
R. G. Ross ◽  
R. P. Longley
Keyword(s):  
Venturia Inaequalis ◽  
Apple Scab ◽  
Good Control ◽  
Fruit Color ◽  
Average Yield ◽  
Apple Trees ◽  
Mercury Acetate ◽  
Excellent Control ◽  
Thinning Effect ◽  
Phenyl Mercury

A 4-year test was carried out on the effect of sprays of captan, dodine, dichlone, and phenyl mercury acetate-captan on the performance of mature McIntosh apple trees. Increases in yield of the same trees over the average yield of the previous 5 years were 40, 31, 18 and 7 per cent, respectively, for captan, dodine, mercury-captan and dichlone. The fungicides had little effect on bloom, tree growth as measured by increase in trunk cross-section, and per cent fruit color. Mercury-captan produced larger apples indicating a thinning effect. The captan sprays produced the most attractive apples. With dichlone, fruit finish was rough. Dodine injured about 3 per cent of the apples in 2 years of the test.Dodine gave the best control of apple scab (Venturia inaequalis). Dichlone was very effective for early fruit scab but did not give good control of late or pin-point scab. Mercury gave excellent control of early scab. Captan allowed some late scab to develop.

STORAGE LIFE OF CHRYSANTHEMUM STOOL CUTTINGS AS INFLUENCED BY FUNGICIDAL TREATMENTS, STORAGE TEMPERATURES, AND STRIPPING

1965 ◽  
Vol 45 (1) ◽  
pp. 86-89
Author(s):  
C. L. Lockhart ◽  
G. S. Swain
Keyword(s):  
Flowering Plants ◽  
Storage Life ◽  
Lateral Growth ◽  
Subsequent Growth ◽  
Mercury Acetate ◽  
Dust Treatment ◽  
Storage Temperatures ◽  
Phenyl Mercury

Chrysanthemum stool cuttings stored from November to May at 28°F to 34°F produced normal flowering plants when planted in the field. Rots seriously affected subsequent growth of stool cuttings stored at 37°F but not at 28°F to 34°F. When rots affected the growing tips only, weak lateral growth occurred on the stool cuttings. An Erad (phenyl mercury acetate) field spray before digging or Thylate as a dip or dust treatment after digging did not prevent mold or rot development in storage. Temperatures below 28°F injured stool cuttings.

The effects of seed size, seed treatment, method of shelling, and organic matter on the establishment of peanuts (Arachis hypogaea) at Katherine, N.T

1968 ◽  
Vol 8 (30) ◽  
pp. 81
Author(s):  
IMW Wood
Keyword(s):  
Organic Matter ◽  
Seed Size ◽  
Seed Treatment ◽  
Marked Effect ◽  
Mechanical Damage ◽  
Treatment Method ◽  
Seed Treatments ◽  
Adverse Conditions ◽  
Mercury Acetate ◽  
Phenyl Mercury

The effect of seed treatment, seed size, incorporated organic matter, and method of shelling on the establishment of peanuts at Katherine, N.T. was studied during two seasons, 1965-66 and 1966-67. Mechanical damage to the seed during machine shelling was one of the main causes of poor establishment : the larger seed was more vulnerable and the smaller grades of mature, well-filled seed may be preferable. Seed treatments that included 'Ceresan' (phenyl mercury acetate) overcame much of the damage caused by machine shelling. It was concluded that the seed treatments gave protection against fungal infection when the testa had been damaged but could not rectify damage to the radicle. Seasonal conditions after sowing were very important in determining the level of establishment, and the relative efficiency of seed treatment was greater under adverse conditions. Incorporated organic matter had no marked effect on establishment, although peanut residue caused a small but significant reduction.

Studies on the germination and field establishment of Summit wheat

1972 ◽  
Vol 12 (55) ◽  
pp. 176 ◽  
Author(s):  
CL Tuohey ◽  
JH Mullett ◽  
GR Easton
Keyword(s):  
Seed Coat ◽  
Laboratory Experiments ◽  
Wheat Cultivar ◽  
Common Bunt ◽  
Mercury Acetate ◽  
Field Emergence ◽  
Phenyl Mercury

Poor field emergence of the wheat cultivar Summit was reported in the Wimmera Region of Victoria after its release to farmers in 1966. In field and laboratory experiments the emergence of Summit was reduced when seed was stored for long periods after being treated with normal rates of a phenyl mercury acetate fungicide commonly used for control of covered smut or common bunt of wheat. A shorter period of storage with higher rates also seriously reduced emergence. Several other fungicides were shown to have varying effects on the emergence of the cultivar and one of these, maneb, gave satisfactory control of bunt. The greater susceptibility of Summit to phenyl mercury acetate demonstrated in these experiments was not associated with the degree of seed coat damage.

FURTHER STUDIES OF MERCURY RESIDUES ON APPLE FRUIT

1960 ◽  
Vol 40 (4) ◽  
pp. 659-665 ◽  
Author(s):  
D. K. R. Stewart ◽  
R. G. Ross
Keyword(s):  
Apple Fruit ◽  
Mercury Acetate ◽  
Phenyl Mercury

Following single cover sprays of Erad (phenyl mercury acetate) mercury residues in apples declined until early in August and then increased until at harvest they were greater than the initial deposits. The accumulation of mercury in the maturing fruit appeared to be by translocation from other parts of the tree.Mylar film was more effective than polythene for protecting fruit from contamination with Erad during and following spraying.

scholarly journals MERCURY RESIDUES IN APPLES IN RELATION TO SPRAY DATE, VARIETY AND CHEMICAL COMPOSITION OF FUNGICIDE

1967 ◽  
Vol 47 (2) ◽  
pp. 169-174 ◽  
Author(s):  
D. K. R. Stewart ◽  
R. G. Ross
Keyword(s):  
Chemical Composition ◽  
Mercuric Chloride ◽  
Ammonium Acetate ◽  
Mercury Chloride ◽  
Apple Trees ◽  
Apple Varieties ◽  
Ammonium Lactate ◽  
Mercury Acetate ◽  
Dimethyl Dithiocarbamate ◽  
Phenyl Mercury

Mercury was readily translocated to growing fruit of apple trees which had received one cover spray of phenyl mercury acetate between June 14 and August 31. The rate of translocation was less with cover sprays applied near the end of this period. Translocation due to a phenyl mercury acetate cover spray occurred to about the same extent in the apple varieties McIntosh, Cortland, Red Delicious and Gravenstein. In addition to phenyl mercury acetate, a cover spray of phenyl mercury chloride, phenyl mercury dimethyl dithiocarbamate, phenyl mercury triethanol ammonium lactate, phenyl mercury monoethanol ammonium acetate, and mercuric chloride resulted in similar translocation of mercury to growing fruit.

Effect of fungicides on the germination of maize seed after storage

1970 ◽  
Vol 10 (43) ◽  
pp. 174
Author(s):  
AM Smith
Keyword(s):  
Methyl Mercury ◽  
Maize Seed ◽  
Seed Treatments ◽  
Mercury Acetate ◽  
Phenyl Mercury

The effect of seed treatments with three fungicides, Ceresan (2.3 per cent phenyl mercury acetate and 0.4 per cent ethoxy mercury silicate), Coversan (96 per cent tetrachloro-p-benzoquinone), and panogen (2.2 per cent methyl mercury dicyandiamide), on the germination of two cultivars of maize stored for up to 12 months after treatment was determined. None of the treatments affected the germination of maize.

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