Comparison of the sensitivity of the mean and the mode in screening coffee seedlings for resistance to coffee berry disease Colletotrichum coffeanum Noack sensu Hindorf (A short communication)

Euphytica ◽  
1990 ◽  
Vol 45 (3) ◽  
pp. 247-250
Author(s):  
J. B. O. Owuor ◽  
C. O. Agwanda
Keyword(s):  
Short Communication ◽  
Coffee Berry ◽  
Coffee Berry Disease ◽  
The Mean ◽  
Colletotrichum Coffeanum

Redistribution of Fungicides in Coffee Trees

1973 ◽  
Vol 9 (3) ◽  
pp. 209-218 ◽  
Author(s):  
J. L. Pereira ◽  
H. R. Mapother ◽  
B. K. Cooke ◽  
Ellis Griffiths
Keyword(s):  
Cuprous Oxide ◽  
Heavy Rainfall ◽  
Tree Canopy ◽  
Coffee Berry ◽  
Effective Protection ◽  
Light Rain ◽  
Coffee Berry Disease ◽  
Colletotrichum Coffeanum

SUMMARYUsing coffee trees sprayed with cuprous oxide and captafol it has been shown that both fungicides are redistributed within the tree canopy by rain. Under conditions of light rain fungicides are removed from upper parts of trees and redeposited at lower levels within the canopy in amounts capable of providing effective protection against coffee berry disease (CBD). With heavy rainfall, however, redeposition of fungicide at effective levels is less likely to occur. The results are discussed in relation to the success of overhead boom sprayers in controlling CBD and the observations that shoots in the upper parts of coffee trees are an important source of spores of the CBD strain of Colletotrichum coffeanum.

Resistance to Coffee Berry Disease in Ethiopia

1983 ◽  
pp. 317-334 ◽  
Author(s):  
N. A. Van der Graaff ◽  
R. Pieters
Keyword(s):  
Coffee Berry ◽  
Coffee Berry Disease

scholarly journals Transrenal passage of nitrates and nitrites in calves (short communication)

1999 ◽  
Vol 42 (3) ◽  
pp. 235-240
Author(s):  
A. Jacková ◽  
P. Siklenka ◽  
J. Pleva
Keyword(s):  
Short Communication ◽  
Clinical Signs ◽  
Potassium Nitrate ◽  
Mean Value ◽  
Significant Elevation ◽  
Total Hemoglobin ◽  
The Mean ◽  
Nitrate And Nitrite ◽  
Nitrite Content

Abstract. In a study with 12 calves on milk nutrition, the course of methemoglobinemia as well as ttansrenal passage of nitrates and nitrites after single per os administrations of 4 g NaNO2 per animal and 30 g KNO3 per animal in the form of water Solutions has been observed. The response of the organism of calves to per os administered doses of sodium nitrite and potassium nitrate was observed by the determination of tlie methemoglobin percentage in blood and the nitrate and nitrite content in urine before the administration ofthe respective dose and after h 1, 2, 3 and 4 after the administration. A significant elevation in the values of methemoglobin was recorded after h 2 after the administration of 4g NaNO3 per animal. The mean value of methemoglobin in blood was 18.84% of total hemoglobin. A slight decline in the values occurred as early as after h 3 after the administration. Of clinical signs, cyanosis of visible mucosae was observed. The highest nitrite and nitrate values in urine were determined after h 2 after per os administration of 4g NaNO2, With the administration of 30g KNO3 per animal, the most pronounced elevation in methemoglobinemia was observed after h 3, when the means values of methemoglobin was 11,75%. Of clinical signs, only slight cyanosis of mucosae was detectable. Maximum values of nitrates in urine of experimental calves after h 3 after the administration of 30 g KNO3 per animal, with the mean value of 29,9 mM NO3−1 clearly demonstrate a good transrenal passage of nitrates in calves on milk nutrition.

The Incidence of Climatic Conditions Favourable to Coffee Berry Disease in Kenya

1971 ◽  
Vol 7 (4) ◽  
pp. 303-314 ◽  
Author(s):  
J. M. Waller
Keyword(s):  
Air Temperature ◽  
Spore Germination ◽  
Growing Season ◽  
Climatic Conditions ◽  
Tree Canopy ◽  
Disease Development ◽  
Spore Dispersal ◽  
Coffee Berry ◽  
Coffee Berry Disease ◽  
Air Temperatures

SUMMARYClimatic conditions affecting the development of CBD are assessed by measuring wetness within the tree canopy and air temperature. Saturation of the tree canopy, necessary for spore dispersal, occurs most frequently at the tops of trees and the duration of wetness permitting spore germination is most prolonged at night. Night air temperatures are closest to berry temperatures and are important in assessing infection periods. Disease development in 1968 and 1969 was related to the number of infection periods during the growing season. Polythene tree covers which kept trees sufficiently dry to stop disease development were used in determining infection at different times of the year.

scholarly journals Seasonal and altitudinal differences in coffee leaf rust epidemics on coffee berry disease-resistant varieties in Southwest Ethiopia

2019 ◽  
Vol 44 (3) ◽  
pp. 244-250 ◽  
Author(s):  
Gerba Daba ◽  
Kenny Helsen ◽  
Gezahegn Berecha ◽  
Bart Lievens ◽  
Adugna Debela ◽  
...  
Keyword(s):  
Leaf Rust ◽  
Coffee Berry ◽  
Southwest Ethiopia ◽  
Coffee Berry Disease ◽  
Disease Resistant ◽  
Resistant Varieties ◽  
Coffee Leaf Rust
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