Science in New Guinea, Volume 11University of Papua New Guinea, 1985 - Agriculture |
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Page 87
... jassid Amrasca devestans Distant . Results showed that the amount of jassid damage had a direct effect on the yield , survival and total plant weight . Νο 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 . Νο correlation was found between numbers of jassid and jassid damage , and the ...
Page 89
... jassid damage to plants was recorded according to the following scale : 0 = total defoliation due to jassid attack 1 = more than 50 % of leaves with jassid burn 2 = 25-50 % of leaves with jassid burn 35-25 % of leaves with jassid burn 4 ...
... jassid damage to plants was recorded according to the following scale : 0 = total defoliation due to jassid attack 1 = more than 50 % of leaves with jassid burn 2 = 25-50 % of leaves with jassid burn 35-25 % of leaves with jassid burn 4 ...
Page 91
... Jassid Damage Figure 1 Effect of jassid.attack on yield % Plant Survival 1.70x y = 0.49 x e 100 O r = 0.712 ( 78 df ) 80 60 00 00 00 40 O 20 0 0 0 1 2 3 4 5 Decreasing Jassid Damage Figure 2 Effect of jassid attack on plant survival ...
... Jassid Damage Figure 1 Effect of jassid.attack on yield % Plant Survival 1.70x y = 0.49 x e 100 O r = 0.712 ( 78 df ) 80 60 00 00 00 40 O 20 0 0 0 1 2 3 4 5 Decreasing Jassid Damage Figure 2 Effect of jassid attack on plant survival ...
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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ABSTRACT Alveolinella analysis animals apertural face areas ascorbic acid Australian barramundi biology bracken Calappa Calophyllum chemistry course cognitive development collected concrete crabs crops curricula curriculum Daru Department Ecology fish Fly River foraminifera forest formal freshwater fronds fronds per square garden gastropods genera geodetic Grade 11 grassland hydrographic infection jassid damage Journal Kiunga laboratory Lake Murray larger foraminifera length Manus Manus Province material mercury concentrations methods Motupore Island Mount Hagen National Capital District National High School Nautilus pompilius operations P.O. Box paper Papua New Guinea plants Port Moresby predation Province provincial high school Pteridium quoyi Research ridges samples satellite scrobiculatus Shayer shell species specimens square metre survey syllabus Table Tanon Straits taro teachers Terebra tertiary tidal topics total mercury Transferred from Keravat trees University of Papua University of Technology vegetables Vermeij vitamin Wau Ecology Institute wightianum yarrabense yield