Science in New Guinea, Volumes 11-12University of Papua New Guinea, 1985 - Agriculture |
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Page 89
... jassid Amrasca devestans Distant . Results showed that the amount of jassid damage had a direct effect on the yield , survival and total plant weight . No correlation was found between numbers of jassid and jassid damage , and the ...
... jassid Amrasca devestans Distant . Results showed that the amount of jassid damage had a direct effect on the yield , survival and total plant weight . No correlation was found between numbers of jassid and jassid damage , and the ...
Page 89
... jassid damage to plants was recorded according to the scale : 1 = May ) following 0 = total defoliation due to jassid attack more than 50 % of leaves with jassid burn 25-50 % of leaves with jassid burn 2 = 3 = 5-25 % of leaves with jassid ...
... jassid damage to plants was recorded according to the scale : 1 = May ) following 0 = total defoliation due to jassid attack more than 50 % of leaves with jassid burn 25-50 % of leaves with jassid burn 2 = 3 = 5-25 % of leaves with jassid ...
Page 94
... jassid damage and yield ( r = 0.775 *** ) tend to confirm that attack by jassids significantly reduces yields . Studies on undamaged yield ( Sutherland , 1984 ) suggest strong varietal differences , and it is postulated here that ...
... jassid damage and yield ( r = 0.775 *** ) tend to confirm that attack by jassids significantly reduces yields . Studies on undamaged yield ( Sutherland , 1984 ) suggest strong varietal differences , and it is postulated here that ...
Contents
Ascorbic acid content of some Papua New Guinean | 1 |
The potential use of modern geodetic methods for geophysical | 19 |
A short note on yields of forty one varieties of aibika | 39 |
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