Among his later studies were Panama disease of bananas, witch's broom disease of Agricultural Research Council until ill-health forced his retirement in 1941.
22.
Even though it is no longer viable for large scale cultivation, Gros Michel is not extinct and is still grown in areas where Panama disease is not found.
23.
Since the 1950s, these cultivars have been the most internationally traded bananas, replacing the Gros Michel banana after crops of the latter were devastated by Panama disease.
24.
The ravages of Panama Disease in that particular cultivar may cause a shift in variety selection, subsequently causing a major change in the physical plant structure of banana plantations.
25.
The green banana, sweet and at least six inches long, became a stereotype some 40 years ago when Caribbean plantations were hit by Panama disease, caused by a fungus.
26.
In addition, an outbreak of Panama disease, a fungus that kills the plant's underground stem, wiped out most of the banana plantations in the early 20th century.
27.
Different races of " F . oxysporum " f . sp . " cubense ", Panama disease on banana, can be susceptible, resistant and partially resistant.
28.
They found it to be Panama disease, although the Cavendish was then thought to be immune, but was immune only to the strain of the fungus that destroyed the Gros Michel.
29.
Cavendish bananas entered mass commercial production in 1903 but did not gain prominence until later when Panama disease attacked the dominant Gros Michel ( " Big Mike " ) variety in the 1950s.
30.
Low-diversity crop variety destroyed : the'Gros Michel'banana was commercially destroyed by Panama disease, caused by the fungus " Fusarium oxysporum " ( illustrated ).
