Publications

The ICFR produces several scientific publications which include internal reports (Bulletins and Technical Notes) as well as Peer-reviewed Papers. We also produce various handbooks, technology transfer documents such as our field guides, and general information publications such as our Annual Research Reviews. Most of our internal reports are proprietary and access to these is limited to our funding members, while other documents are freely available to everyone. To access our closed reports, ICFR members and research collaborators need to log in to the website (please first create an account if you don't have one).

Early results from the South African Leptocybe invasa National Monitoring Programme

Authors
Germishuizen I, Hurley BP
Publication Type
Technical Note
Publication Year
2017

The first national monitoring survey of the blue gum chalcid wasp, Leptocybe invasa, in the eucalypt plantations of the summer rainfall region of South Africa was conducted between November 2016 and February 2017. One hundred and eighteen sites were surveyed for the presence of L. invasa-induced damage, damage intensity and presence of other insect pests and pathogens. Leptocybe invasa was present in 27% of sites sampled. When present, damage was predominantly of low intensity and uniformly spread, affecting most trees in the stand.

Quantifying the impact of Uromycladium acaciae (wattle rust) on black wattle (Acacia mearnsii) growth and productivity

Authors
Nxumalo T, Morris A, Germishuizen I
Publication Type
Technical Note
Publication Year
2017

Uromycladium acaciae is a pathogen-causing disease on black wattle plantations. First discovered in 2013 near Eston in the KwaZulu-Natal Midlands, the disease has since spread throughout the wattle growing regions of South Africa and Swaziland. Symptoms are characterised by leaf deformation, defoliation, stem infection and stunted tree growth. The disease affects trees of all ages, from seedling stage to end of rotation.

Follow-up watering to improve seedling survival in commercial plantation forests: A short review

Authors
Titshall L, Dovey S
Publication Type
Technical Note
Publication Year
2017

Water stress at and soon after planting are major causes of seedling mortality in forestry reestablishment, even during prescribed planting windows. Planting with water (puddle planting) or with hydrogel during unfavourable moisture conditions has limited capacity to sustain adequate water supply to the plant. To ensure adequate water supply it may be beneficial to periodically re-apply water to each plant over short intervals (days to weeks) after planting. This is recommended as a standard practice in Brazil, though no literature to indicate the magnitude of the benefit was found.

Four-year growth analysis and selections in a 2nd series Corymbia henryi provenance / progeny trials series

Authors
van den Berg G, Swain T-L
Publication Type
Bulletin
Publication Year
2017

Corymbia henryi has shown potential for good growth and pest and pathogen tolerance in the sub-tropical and warm temperate forestry areas in South Africa. To further expand the genetic base of this species, two trials comprising six provenances from Australia were established on the Zululand Coastal Plains in 2010. Four-year diameter at breast height measurements were performed in the trials, survival and basal area per hectare calculated, and Type B correlations estimated to determine genotype x environment interaction.

Are chemical antitranspirants useful to improve seedling survival after planting?

Authors
Titshall L, Dovey S, Ackerman S
Publication Type
Technical Note
Publication Year
2017

Antitranspirants are a range of chemicals and compounds applied to plant foliage aimed at lowering transpiration rates of plants under conditions that can lead to water stress. While antitranspirants have been widely tested in horticultural crops, there has been limited use in forestry applications. Where they have been tested, antitranspirants are reported to lower seedling transpiration rates under simulated stress conditions, but may lower growth rates and lead to death. There is limited evidence for cost effective in-field benefits of these products.

7th Forest Science Symposium: Research Underpinning the Sustainability of a Diverse Forestry Sector

Authors
Naidoo SN, Upfold SJ
Publication Type
Other
Publication Year
2017

The Institute for Commercial Forestry Research (ICFR) held its 7th Forest Science Symposium from 18 to 20 July, at the One Life Church in Pietermaritzburg. The three-day event was co-hosted by the ICFR, the International Union of Forest Research Organizations (IUFRO), the Department of Agriculture, Forestry and Fisheries (DAFF) and other research partners.

The expression of fluazifop-P-butyl phytotoxicity in eucalypt seedlings under hot and humid conditions

Authors
Roberts JC, Little KM, Light ME
Publication Type
Technical Note
Publication Year
2017

At the time of trial implantation (11 January 1996), Fusilade® (fluazifop-P-butyl) was a registered herbicide used for the control of grasses in commercial eucalypt plantations. However, concern was expressed about young eucalypt seedling phytotoxicity from “over the top” spraying with Fusilade®, especially under hot and humid conditions. This was tested in a nursery trial using Eucalyptus grandis clonal cuttings (GC784) and Eucalyptus nitens seedlings.

The impact of pitting techniques and fertiliser type and placement on Eucalyptus grandis x E. nitens and Pinus elliottii x P. caribaea survival, growth and uniformity in the KwaZulu-Natal Midlands

Authors
Kaptein N, Titshall L
Publication Type
Technical Note
Publication Year
2017

Soil preparation prior to planting is no longer a purely manual operation, with semi-mechanised and fully mechanized pitting techniques becoming more frequently utilised. Manual pitting is well understood in South Africa; however, there is limited information on the impact of semi-mechanised or mechanised pitting techniques on tree performance. In addition, the impact of fertiliser application and placement in pits created by semi-mechanised and mechanised pitting is not fully understood.

Recommendations for the establishment of trap tree plots for the monitoring of Sirex noctilio under South African pulpwood and sawtimber plantation conditions

Authors
Croft PK, Verleur PM
Publication Type
Technical Note
Publication Year
2017

South African pine growing areas, the plantations are managed under various silviculture treatments to produce numerous products. The diversity in stocking, rotation age, species, thinning regimes etc. creates a mosaic pattern. Within this mosaic pattern there is a need to establish trap trees to monitor the presence of Sirex noctilio.

The South African Sirex Control Programme: Monitoring and biological control guidelines for Sirex noctilio infestations in the summer rainfall regions of South Africa

Authors
Verleur PM, Croft PC, Germishuizen I
Publication Type
Technical Note
Publication Year
2017

Personnel involved in the initial Eastern Cape and KZN Sirex noctilio outbreak from 2005 to 2008 were also involved in releasing and monitoring levels of parasitism brought about by both parasitoids through Mpumalanga and Limpopo. The experience they gained and parameters which became key in managing the pest, would be beneficial to other Pine growers who had not experienced similar losses through high tree mortality due to S. noctilio.