Changes in soil fertility and leaf nutrient concentration at a sugar cane plantation in Papua New Guinea

1998 ◽  
Vol 29 (7-8) ◽  
pp. 1045-1060 ◽  
Author(s):  
Alfred E. Hartemink
Keyword(s):  
Soil Fertility ◽  
Papua New Guinea ◽  
Sugar Cane ◽  
Nutrient Concentration ◽  
New Guinea ◽  
Leaf Nutrient Concentration

Inheritance of Cowpea Yields under Different Soil Conditions in Papua New Guinea

1978 ◽  
Vol 14 (1) ◽  
pp. 23-28 ◽  
Author(s):  
W. Erskine ◽  
T. N. Khan
Keyword(s):  
Soil Fertility ◽  
Grain Yield ◽  
Papua New Guinea ◽  
Seed Weight ◽  
New Guinea ◽  
Indirect Selection ◽  
Direct Selection ◽  
Soil Conditions ◽  
Selection For ◽  
Broadsense Heritability

SUMMARYBroadsense heritability, and correlations of grain yield and related characters, were estimated in three crosses under two levels of soil fertility, which profoundly affected heritability of height and seed weight. Grain yield exhibited heritability of 51–81%, and in one cross significant heterosis in F2. Amongst yield-related characters only pods/plant and seeds/pod were both correlated to yield, and also lacked negative genotypic correlations with other economic characters. However, direct selection for grain yield was considered more efficient than indirect selection using yield-related characters.

New species and new records of Perkinsiella (Hemiptera: Delphacidae) from Papua New Guinea

1979 ◽  
Vol 69 (3) ◽  
pp. 507-517 ◽  
Author(s):  
R. G. Fennah
Keyword(s):  
New Species ◽  
Papua New Guinea ◽  
Sugar Cane ◽  
New Records ◽  
New Guinea

AbstractSix species of Perkinsiella, P. macrinus sp. n., P. diagoras sp. n., P. my con sp. n., P. bulli sp. n., P. falcipennis sp. n. and P. boreon sp. n., are described from material collected in Papua New Guinea. New locality records are given for the sugar-cane pests P. saccharicida Kirk., P. vastatrix (Bredd.), P. rattlei Muir, P. sinensis Kirk., P. lalokensis Muir, P. papuensis Muir and P. thompsoni Muir.

Perkinsiella vastatrix. [Distribution map].

1977 ◽  
Author(s):  
Keyword(s):  
Host Plant ◽  
Papua New Guinea ◽  
Geographical Distribution ◽  
Sugar Cane ◽  
Pacific Islands ◽  
New Guinea ◽  
Distribution Map ◽  
Disease Information ◽  
New Distribution

Abstract A new distribution map is provided for Perkinsiella vastatrix (Bredd.) (Delphacodes vastatrix Bredd.) (Hem., Delphacidae). Host Plant: Sugar cane. (A vector of Fiji disease). Information is given on the geographical distribution in ASIA, Indonesia, Japan, Malaysia, Philippines, Singapore, Taiwan, PACIFIC ISLANDS, Papua New Guinea.

A new genus and species of Elachistid moth (Lepidoptera, Elachistidae) reared on sugar-cane in Papua New Guinea

1974 ◽  
Vol 64 (1) ◽  
pp. 73-79 ◽  
Author(s):  
J. D. Bradley
Keyword(s):  
Papua New Guinea ◽  
Sugar Cane ◽  
New World ◽  
New Genus ◽  
New Guinea ◽  
New Genus And Species

AbstractAn Elachistid moth whose larva mines leaves of sugar-cane in Papua New Guinea is described and named Eupneusta solena gen. et sp. n. The genus is differentiated from Dicranoctetes Braun, a New World genus which contains the Cuban species D. saccharella (Busck) whose larva is also a miner in leaves of sugar-cane. Descriptions of the larva and pupa are included, and special note is made of the highly developed spiracular processes of these stages.

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