scholarly journals Predicting the seasonal phenology of fall webworm (Hyphantria cunea) in New Zealand

2007 ◽  
Vol 60 ◽  
pp. 279-285 ◽  
Author(s):  
J.M. Kean ◽  
L.B. Kumarasinghe
Keyword(s):  
New Zealand ◽  
Life Stage ◽  
Stage Model ◽  
Hyphantria Cunea ◽  
Local Conditions ◽  
The North ◽  
Model Predictions ◽  
The Usa ◽  
Fall Webworm ◽  
And Control

A cohortbased model for the seasonal phenology of the blackheaded strain of the fall webworm Hyphantria cunea (Lepidoptera Arctiidae) was constructed from published development rates for each life stage Model predictions were successfully verified against field observations from Japan China Italy Serbia and the USA The model was then used to predict phenology in New Zealand and the potential for establishment near major ports Populations are predicted to be bivoltine in the north and univoltine in central areas but are unlikely to form selfsustaining populations south of Timaru Fall webworm demonstrated the ability to adapt to specific local conditions after its invasion of Japan so the risk may be greater than these results suggest Successful validation of the model means that it could be used to inform surveillance and control operations targeting fall webworm outbreaks overseas and potential invasions into new ranges such as New Zealand

Feeding and Control of Toheroa (Amphidesma ventricosum Gray) (Eulamellibranchiata) Populations in New Zealand.

1954 ◽  
Vol 5 (3) ◽  
pp. 486 ◽  
Author(s):  
AM Rapson
Keyword(s):  
New Zealand ◽  
Water Samples ◽  
Dominant Species ◽  
Sea Water ◽  
Quantitative Estimation ◽  
Dry Weight ◽  
The North ◽  
And Control

Surveys of toheroa stocks on the North Island beaches of New Zealand are described and the causes of natural and epidemic mortality discussed. The evidence for previous resurgent populations of tuatua (Amphidesma subtriangulatum Wood) alternating with toheroa is given. Analyses of water samples show that a source of sea-water rich in nutrient salts produces the great quantities of diatoms on which the shellfish populations feed. A quantitative estimation is made of the littoral phytoplankton and the dominant species are given for each beach. Chaetoceros armatus is found on all beaches and, in the cold months, when blooming occurs, comprises in some places 100 per cent. of the diatoms. The greatest quantity recorded is 1500 g dry weight per cu. m. of water. Each beach has a characteristic flora. The rate at which toheroa feed is determined from the diatom consumption. Methods are suggested by which more stable toheroa stocks might be developed and consequently a greater production achieved.

8 The ten largest Consolidated Metropolitan Statistical Areas in 229 order of population sized 1991 9.9 Extreme percentage values of population change—people over 230 65, unemployed, Black and Hispanic 9.10 A comparison of the largest urban agglomerations in six parts 231 of the world 10.1 Mineral resources of the USA, Canada and Australia in 236 percentages of the world total 10.2 Demographic profiles of selected countries 237 10.3 Calendar for Canada, Australia and New Zealand 240 10.4 Wheat yields 240 10.5 Area and population of the provinces of Canada, the states of 242 Australia, and New Zealand 10.6 The direction of Australian foreign trade, 1951 and 1990 243 11.1 Latin American calendar from 1492 to the present 250 11.2 Demographic features of the twenty-three largest Latin 253 American countries 11.3 Economic and social aspects of the twenty-three largest Latin 254 American countries 11.4 Demographic and social data for the states of Mexico, 1990 265 11.5 Data set for the states of Brazil and the macro-regions 273 11.6 Forest and woodland in northern and central South America 275 11.7 Population in millions in the North region of Brazil in relation 278 to the total population of Brazil, 1872–2000

2003 ◽  
pp. 668-668
Keyword(s):  
New Zealand ◽  
Latin American ◽  
Population Change ◽  
Mineral Resources ◽  
Data Set ◽  
Demographic Profiles ◽  
The North ◽  
The World ◽  
The Usa ◽  
Central South

scholarly journals White clover ecotype germplasm from the USA for development of New Zealand and overseas cultivars

1996 ◽  
Vol 6 ◽  
pp. 149-153
Author(s):  
K.H. Widdup ◽  
J.R. Caradus ◽  
J. Green ◽  
Mueller Pennell
Keyword(s):  
North Carolina ◽  
New Zealand ◽  
White Clover ◽  
Leaf Size ◽  
The North ◽  
Nodal Roots ◽  
Wide Range ◽  
Eastern Usa ◽  
The Usa ◽  
Small Set

An ecotype collection of 98 populations of white clover (Trifolium repens L.) from pastures in the eastern USA together with five USA Ladino and five New Zealand cultivars were grown in grass swards at Raleigh, North Carolina; Palmerston North and Lincoln, New Zealand. The material was compared for leaf size, cyanogenesis, seasonal growth, % clover cover and persistence. When examined as a single group, the USA ecotypes consisted of a wide range of plant types from small-leaved acyanogenic to large-leaved cyanogenic types. This contrasted with the uniformly large-leaved acyanogenic USA Ladino cultivars which have been the principal cultivars sown in eastern USA. Various selection pressures over time together with introgression between Ladino and resident wild clover types has resulted in a wide array of plant types. At the North Carolina site, USA ecotype material generally demonstrated better growth and persistence compared to the USA Ladino and New Zealand cultivars. The best ecotype plots from the Piedmont (inland region) had 55% clover cover by the third spring compared to 12% cover from the USA cultivar, SRVR and 2% cover from the NZ cultivar, Huia. Selective pressures such as hot summers, viruses, root-feeding pests and other stresses on the local clover types have resulted in ecotype material with improved adaptive features. The USA ecotype collection is an important source of germplasm for development of improved white clovers for the eastern USA. At the New Zealand sites, the USA material demonstrated pooraverage yields compared to NZ cultivars. However, a small set of USA ecotypes showed good recovery following the dry 1995 summer at Lincoln and this material warrants closer examination to determine the adaptive mechanisms involved. As the USA ecotypes show a general lack of adaptation to New Zealand pastures, any desirable features such as heat tolerance, deeper nodal roots or virus resistance uncovered in this material will require hybridisation and backcrossing with selected elite New Zealand material to capture the benefits. Keywords: adaptation, eastern USA, ecotype populations,

scholarly journals Developing Identities: The Relational Identities of New Zealand NGOs

2021 ◽  
Author(s):  
◽  
Andrew Johnston
Keyword(s):  
New Zealand ◽  
Narrative Analysis ◽  
Focal Point ◽  
Local Communities ◽  
The South ◽  
Structured Interviews ◽  
The North ◽  
Working Together ◽  
To Come ◽  
And Control

<p>Non-Governmental Organisations (NGOs) are significant institutions within development. Ideally, they represent the voice and aspirations of grassroots communities and they are born of a movement of local communities in the North and South. NGOs, however, are experiencing a crisis of identity. Changing geopolitical paradigms, increasingly critical analysis from the development academy and, in New Zealand especially, significant changes in the funding environment have caused substantial challenges to NGO identity, purpose and legitimacy. This research qualitatively assesses the identity of Northern NGOs (NNGOs) in New Zealand. It explores the elusive identity of these organisations through the focal point of their partnerships. Using narrative analysis in semi-structured interviews with development practitioners from varied organisations, this thesis elucidates the challenges and aspirations of NNGO identity. This thesis analyses these identities through three themes: in the manner in which they communicate their identity to their partners and supporters; in their understanding and enactment of the inherent power imbalances of the North-South dichotomy; and in the forming of relationships in the South that inform their primary functional identity. In response to the changing environment within which they work, NNGO identities are increasingly fragmented, their roles as fundraisers, programme workers and advocates for justice often conflict and inform an identity that is multiple, fluid and complex. Contemporary NNGOs must find legitimacy in their connection to the grassroots in the North and the South, in advocacy, in programming, in fundraising and in fulfilling their in role of translators and mediators of development. The changes to the New Zealand government‘s support of NNGOs have brought a significant challenge to these roles, and the NNGO response to these challenges will be definitive in the years to come. Most importantly, NNGOs are reclaiming their role as the representatives of a transnational movement of people working together to bring equity and justice, and to facilitate development that local communities can understand and control.</p>

Synonymy and Color Variation in the Fall Webworm, Hyphantria cunea Drury (Lepidoptera: Arctiidae)

1963 ◽  
Vol 95 (11) ◽  
pp. 1217-1223 ◽  
Author(s):  
R. F. Morris
Keyword(s):  
Feeding Habits ◽  
Color Variation ◽  
Hyphantria Cunea ◽  
Feeding Behaviors ◽  
Larval Stages ◽  
The North ◽  
Color Differences ◽  
The Common ◽  
Fall Webworm ◽  
North And South

AbstractNorthern and southern specimens of the fall webworm in eastern North America exhibit color differences in both the adult and larval stages, and have often been referred to Hyphantria textor Harris and H. cunea Drury, respectively. However, they will readily inter-breed and produce viable offspring; differences in wing maculation are not discrete and genitalic differences have not been found; differences in the degree of larval pigmentation are not discrete and depend largely on environmental factors; and the nesting and feeding behaviors are similar. It is therefore concluded that the common webworm (larvae with the head and dorsal tubercles black) in both north and south should be referred to H. cunea, which has priority. A sibling species or race (lighter heads and tubercles and different nesting and feeding habits) occurs sympatrically with cunea in the south and also, rarely, in the north; if it has specific status it cannot be referred to either cunea or textor; so textor is relegated to synonymy.

scholarly journals Developing Identities: The Relational Identities of New Zealand NGOs

2021 ◽  
Author(s):  
◽  
Andrew Johnston
Keyword(s):  
New Zealand ◽  
Narrative Analysis ◽  
Focal Point ◽  
Local Communities ◽  
The South ◽  
Structured Interviews ◽  
The North ◽  
Working Together ◽  
To Come ◽  
And Control

<p>Non-Governmental Organisations (NGOs) are significant institutions within development. Ideally, they represent the voice and aspirations of grassroots communities and they are born of a movement of local communities in the North and South. NGOs, however, are experiencing a crisis of identity. Changing geopolitical paradigms, increasingly critical analysis from the development academy and, in New Zealand especially, significant changes in the funding environment have caused substantial challenges to NGO identity, purpose and legitimacy. This research qualitatively assesses the identity of Northern NGOs (NNGOs) in New Zealand. It explores the elusive identity of these organisations through the focal point of their partnerships. Using narrative analysis in semi-structured interviews with development practitioners from varied organisations, this thesis elucidates the challenges and aspirations of NNGO identity. This thesis analyses these identities through three themes: in the manner in which they communicate their identity to their partners and supporters; in their understanding and enactment of the inherent power imbalances of the North-South dichotomy; and in the forming of relationships in the South that inform their primary functional identity. In response to the changing environment within which they work, NNGO identities are increasingly fragmented, their roles as fundraisers, programme workers and advocates for justice often conflict and inform an identity that is multiple, fluid and complex. Contemporary NNGOs must find legitimacy in their connection to the grassroots in the North and the South, in advocacy, in programming, in fundraising and in fulfilling their in role of translators and mediators of development. The changes to the New Zealand government‘s support of NNGOs have brought a significant challenge to these roles, and the NNGO response to these challenges will be definitive in the years to come. Most importantly, NNGOs are reclaiming their role as the representatives of a transnational movement of people working together to bring equity and justice, and to facilitate development that local communities can understand and control.</p>

scholarly journals Chemistry of the sex pheromone gland of the fall webworm Hyphantria cunea discovered in New Zealand

2005 ◽  
Vol 58 ◽  
pp. 31-36 ◽  
Author(s):  
A.M. El-Sayed ◽  
AR. Gibb ◽  
D.M. Suckling
Keyword(s):  
New Zealand ◽  
Sex Pheromone ◽  
North American ◽  
Trace Amount ◽  
Pheromone Gland ◽  
Hyphantria Cunea ◽  
Native North American ◽  
Sex Pheromone Gland ◽  
Fall Webworm ◽  
Pheromone Glands

The sex pheromone glands of two females of the fall webworm Hyphantria cunea Drury (Lepidoptera Arctiidae) that were discovered in Auckland in March 2003 were extracted in hexane and were subjected to GCMS analysis Four compounds were identified (9Z12Z15Z)octadeca91215trienal (9Z12Z)octadeca912dienal (3Z6Z)9S10Rcisepoxyhenicosa36diene and (13Z6Z)9S10Rcis910epoxyhenicosa136triene The ratio of these four compounds in the gland extracts was 660627901 Except for a trace amount of the trienic epoxide detected in the New Zealand sample the ratio of the three other compounds was very similar to native North American females of this species A direct comparison between the synthetic commercial lure Nitolure and the sex pheromone gland of females found in New Zealand indicates that the sex pheromone gland contains significantly more of (3Z6Z)9S10Rcisepoxyhenicosa36diene than the synthetic lure while the lure lacks the trace amount of the trienic epoxide Therefore the effectiveness of Nitolure at trapping fall webworm in New Zealand remains uncertain

PRESENT AND FUTURE PROSPECTS FOR FORESTRY IN THE CENTRAL PUMICE REGION

1971 ◽  
pp. 14-17
Author(s):  
J. Ure
Keyword(s):  
New Zealand ◽  
Primary Production ◽  
Future Prospects ◽  
Export Markets ◽  
Local Conditions

The region contains half the area of exotic forest in New Zealand and the major industries dependent thereon. Both are expanding rapidly to meet promising export markets. Local conditions are particularly favourable for this form of primary production and continued expansion is expected.

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