PPRI News Plant Protection Research Institute (PPRI) News
The Plant Protection Research Institute (PPRI) is an organisation in the Public Support Services Division of the Agricultural Research Council (ARC) . It focuses mainly on weeds, plant diseases, Insect ecology and biological control of invasive species. These newsletters contain a wealth of information on invasive species in South Africa.
PPRI News No.107 - January-March 2016
* The incorporation of a world renowned collection into the National Collection of Fungi. * Management of Verticillium wilt of tomatoes. * ARC - Russian collaboration on eriophyoid mites * Bacterial pathogens of onion seed.
PPRI News No. 106 - October - December 2015
* Approval granted for the release of Recchia parvula as a biological control agent of Chromolaena odorata in South Africa * Aphid pest arrives on oak trees in South Africa * S.A joins international collaboration on management of Parthenium hysterophorus in East Africa using biological control.
* The National Collection of Fungi celebrates its 110th anniversary: Research in progress to control small round-leaved prickly pear * New species of bee described from South Africa: An update on post release evaluation of the biological control of Acacia longifolia and A. pycnantha in South Africa * Scientific meetings: Visits and personnel.
PPRI News No. 104 - April - June 2015
* Release of a leaf-mining fly, Pseudonapomyza sp. on yellow bells (Tecoma stans) in South Africa * Promotion of taxonomy as a scarce skill to Green Career Excursion students * Congratulations to Dr Pholoshi A. Maake for obtaining his Doctoral Degree * Workshop and training.
PPRI News No. 103 - January - March 2015
* ARC-PPRI scientist receives award: Biosystematics (Red listing of South African Spider Species, new appointments and farewell on biosystematics) * Pesticide science * Plant microbiology * Weed research * Technology transfer.
PPRI News No. 102 - October - December 2014
* Cochineal biotype * International Workshop on Biological Control and Management of Parthenium hysterophorus * Zygogramma bicolorata agents on Parthenium hysterophorus.
PPRI News No. 101 - July - September 2014
* Grapevine leafroll disease (GLD) * Pareuchaetes insulate * Chromolaena odorata * Pareuchaetes insulate * Acacia longifolia (Andr.) Willd * Acacia pycnantha Benth.
PPRI News No. 100 - April - June 2014
* Why implementation is important for the biological control of Hakea sericea in South Africa * Progress on the releases of the yellow bells lady beetle (Tecoma Stans) in South Africa.
PPRI News No. 99 - January - March 2014
* Biological control of hydrilla in South Africa * International Symposium hosted by South Africa for weed biological control.
PPRI News No. 98 - October - December 2013
* Stem- boring beetle released against rock hakea * Prospects brighten for the biological control of the weedy Mexican sunflower, Tithonia diversifolia, in South Africa * First releases of the pompom thrips in SA * A new weed biological control programme in South Africa against the invasive giant reed (Arundo donax)
PPRI News No. 97 - July - September 2013
* Biological control of balloon vine (Cardiospermum grandiflorum) in South Africa: targeting the seed output with the weevil (Cissoanthonomus tuberculipennis) * South Africa the first in Africa to release a stem boring weevil for the biological control of famine weed * First releases of Mexican beetle (Zygogramma bicolorata) against famine weed (Parthenium hysterophorus) in South Africa
PPRI News No. 96 - April - June 2013
* Release of biological control agents approved by DAFF * Dichrorampha odorata – a newly-released biocontrol agent for Siam weed (chromolaena odorata) * Destructive leaf – feeder about to be released against yellow bells.
PPRI News No. 95 - January - March 2013
* Taking a shot at Hakea (hakea sericea) * Invasive Alien acacia species as alternative substrate for oyster mushroom cultivate * Flower-galling mite shows great promise as a biological control agent of tickberry (Lantana camara in South Africa) * The Waterberg Biosphere Reserve and threats from invasive alien plants.
PPRI News No. 94 - October - December 2012
* A Century of Biological Control of Invasive Alien Plants in South Africa * Helping Heuningvlei community to surmount their cactus dilemma * Strangler invaders: a new threat.
PPRI News No. 93 - July - September 2012
* Two biocontrol successes for the cost of one * Current knowledge of spiders as biological control agents in South Africa * International Collaboration is a Boon to Biocontrol Research on Balloon Vine in South Africa.
PPRI News No. 92 - April - June 2012
* Rosewood (Tipuana psyllid) now in South Africa * a tale of two Mexican leaf beetles: candidate biocontrol agents for Mexican sunflower (tithonia rotundifolia) in South Africa.
PPRI News No. 91 - January - March 2012
* First releases of a biocontrol agent against Famine weed * New invasive Floating fern (salvinia) found at Hartebeespoort Dam.
PPRI News No. 90 - October - December 2011
* New fact sheets on invasive alien plants available * A helping hand for biological control in the Western Cape.
PPRI News No. 89 - July - September 2011
* Definitive Publication on the Biological Control of Invasive Alien Plant in South Africa * Weeds researchers attend international symposium in Hawai’i * Water hyacinth Grasshopper (Cornops aquatic) Free at last.
PPRI News No. 88 - April - June 2011
* Awareness for invasive and toxic inkberries, jessamines (Cestrum species) * Research towards enhancing the biological control of invasive cactus in Northern Cape * Current status of yellow bells (Tecoma Stans), an invasive ornamental plant in South Africa.
PPRI News No. 87 - January - March 2011
* Biocontrol of Siam weed (chromolaena adorata) * is pompom weed waging chemical warfare on the grasslands it invades * the first report of a New World seed beetle in South Africa.
PPRI News No. 86 - October - December 2010
* Stem-galling wasp (Tetramesa romana) a host-specific natural enemy of the Invasive giant reed (Arundo donax) found to be widespread and parasitized In South Africa * First Annual South African Young Scientists Conference * The use of herbicides as a tool in managing famine weed * New biological control agent released against cat’s claw creeper (Macfadyena unguis-cat) * International Organization for Biological Control (IOBC) workshops on invasive alien plants held in Kenya.
PPRI News No. 85 - July - September 2010
* 38th annual workshop on the biological control of invasive alien plant in South Africa A * Biological control of famine weed (Parthenium hysterophorus) in South Africa * the rust fungus, Prospodium tuberculatum, rejected as a possible biocontrol agent for Lantana camara in South Africa.
PPRI News No. 84 - April - June 2010
* The biological control of the invasive plant Famine weed (Parthenium hysterophorus) in South Africa * Lantana herringbone leaf-miner now in Ethiopia.
PPRI News No. 83 - January - March 2010
* Biocontrol of Hydrilla verticillata at Pongolapoort Dam by an immigrant moth, Parapoynx diminutalis * Biocontrol of Hydrilla verticillata * National initiative aims to halt further expansion of pompom weed (Campuloclinium macrocephalum) * Survey for biocontrol agents against eastern Australian acacias * Lantana herringbone leaf-miner now in Madagascar.
PPRI News No. 82 - October - December 2009
* Southern African Plant Invaders Atlas (SAPIA) surveys in the south-western Cape * Refurbished weed pathogen quarantine facility * Weed biocontrol at the Sunday Tribune Garden and Leisure Show.
PPRI News No. 81 - July - September 2009
* Leaf smut appears to have controlled mistflower in KwaZulu-Natal * Promising candidate biocontrol agents for Mexican poppies.
PPRI News No. 80 - April - June 2009
* ARC-PPRI hosts international Chromolaena webpage: IOBC webpage upgraded and moved * biology and crossbreeding of two Pareuchaetes insulata populations * Initial establishment of the lantana petiole gall weevil biocontrol * Workshop on the biological control of invasive alien plants.
PPRI News No. 79 - January - March 2009
* Biocontrol of invasive cactus exceeds all expectations * Cornops aquaticum shows promise as a biological control agent for water hyacinth * A promising potential biocontrol agent for yellow bells (Tecoma stans) in South Africa * Role of fungal endophytes in promoting invasiveness of Australian Acacia species in South Africa.
PPRI News No. 78 - September - October 2008
* First releases of biocontrol agents against problem cactus * Early indications of establishment of biocontrol agent on cat’s claw (Uncaria tomentosa) * Optimism prevails in South Africa for biological control of two emerging weeds, red sunflower ( Tithonia rotundifolia ) and Mexican sunflower (Tithonia diversifolias) * News snippets from Weeds Research.
PPRI News No. 77 - July - September 2008
* Renewed biocontrol research on crofton weed (Ageratina adenophora) * Insect community in seed capsules of the River Red Gum, Eucalyptus camaldulensis, in South Africa.
PPRI News No. 76 - April - June 2008
*Survey for natural enemies of Cestrum and Cardiospermum species in Argentina * Pseudonapomyza sp. (Diptera: Agromyzidae), a potential biological control agent of yellow bells (Tecoma stans: Bignoniaceae) * Temperature as a catalyst for boom * The 36th Annual Weeds Biological Control Workshop * From the rockery to the veld - invasive ornamental succulents.
PPRI News No. 75 - January - March 2008
*Alien invasive predator spreading in South Africa -this harlequin is no jester! * Alien invasive predator spreading * New weed biocontrol quarantine facility opens at Cedara * Climbing asparagus (Asparagus scandens) * Gall Rust for the Biological Control of Yellow Bells * Survey for natural enemies of Australian myrtle in Australia * SAPIA surveys and a nightmare of Rubus taxonomy.
PPRI News No. 74 - October - December 2007
* Biological control of hydrilla * Attacking the root of the lantana problem * Pompom weed – the pink invasive * Adding pressure on lantana.
PPRI News No. 73 - July - September 2007
* SAPIA II project reveals previously unrecorded prickly poppy
(Argemone) in the Western Cape * Mexican poppies targeted for biological control * Two new candidate biocontrol agents for Tecoma stans * Problem cactus to be controlled biologically
PPRI News No. 72 - April - June 2007
* The eucalypt leaf, twig and stem galling wasp, Leptocybe invasa now in SA * Blastopsylla occidentalis : another new Eucalyptus pest in South Africa * Bugweed under attack * Garbage dumps of invasive alien vegetation on the KZN south coast * 35th Annual Weeds Workshop, 3-8 June 2007
PPRI News No. 71 - January - March 2007
* Invasion of ‘roses’ in the eastern Free State * Pompom weed—new threats to the grasslands of Limpopo, Mpumalanga and Free State * Creating public awareness of invasive alien plants
PPRI News No. 70 - December 2006
* Pompom weed threatens the Waterberg * Potential new biological control
Agents for stinkbean * Population explosion of pompom weed in Gauteng * Locally discovered rust fungus to curb pompom weed?
PPRI News No. 69 - July - September 2006
* A Wasp Counterattack to Save Pine Trees * Madeira vine (Anredera cordifolia), a new emerging weed in South Africa * Pre-release efficacy testing of a potential agent for water hyacinth biocontrol in South Africa * A potential biocontrol agent for yellow bells (Tecoma stans) as well as cat’s claw creeper (Macfadyena unguis-cati) * Prediction of safety and effectiveness of Lon-gitarsus bethae, a candidate biocontrol agent for the noxious weed Lantana camara.
PPRI News No. 68 - April - June 2006
* New faces at the Weeds Division * The 34th Annual Weeds Biological Control
Workshop at Klein Kariba: 22-26 May 2006 * Collaborative research on southern African Leaf Beetles (Coleoptera: Chrysomelidae) * Mites a serious problem on apples in the Western Cape * Pareuchaetes insulata population explodes on the KZN South Coast * Exploration for seed-feeders of Eucalyptus species in Australia * New biocontrol agent from Australia released against Hakea sericea * The threat of hydrilla to South Africa.
PPRI News No. 67 - January - March 2006
* Laboratory and field host utilization by established biological control agents of Lantana camara L. in South Africa * The evaluation of cf. Phenrica sp. 2 (Coleoptera: Chrysomelidae: Alticinae), as a possible biological control agent for Madeira vine, Anredera cordifolia (Ten.) Steenis in South Africa.
PPRI News No. 66 - October to December 2005
* The Working for Water Programme for Building Research Capacity in the field of Biological Control of Weeds * Survey for natural enemies of Tecoma stans in the USA * PPRI field trip to Venezuela and Jamaica for biocontrol of Siam weed (chromolaena odorata)
PPRI News No. 65 - July - September 2005
*33rd Annual Weeds Biocontrol Workshop * News from the Stellenbosch Weeds Laboratories * Two new insect agents for the biocontrol of hakea * Dasineura dielsi, the small fluted galler, released for the biological control of Acacia cyclops (rooikrans) in the Western Cape * Fungus established for the biocontrol of lantana * Predatory mites attacking biocontrol agent * The impact of the gall rust fungus in controlling Port Jackson willow * Bioherbicide fungi for hakea and black wattle still available * Obituary – Biocontrol scientists - Hardi Oberholzer and Daniel Mafokoane.
PPRI News No. 64 - July 2005
*Helmuth Zimmermann retires from Weeds Division * Arne Witt takes over at Weeds Division * News from the Cedara Weeds Laboratory in KZN * Biocontrol of triffid weed (Chromolaena odorata) * Biocontrol of bugweed (Solanum mauritianum) * Biocontrol of famine weed (Parthenium hysterophorus) * Biocontrol of pompom weed (Campulclinium macrocephalum) * At last – a good biocontrol agent against lantana! * Finding safe and effective natural enemies for Pompom weed * New Eucalyptus pests discovered * Working for Water fights water hyacinth * Developing regulations in terms of the Biodiversity Act