Nuwe, aggressiewe rasse van roesswam bekommer
Sonneblomroes kan aanleiding gee tot oesverliese, veral wanneer vroeë infeksies op vatbare basters met betekenisvolle verlies van funksionele blaaroppervlak gepaard gaan.
Heelwat inligting is beskikbaar oor die seisoenale voorkoms van die siekte in Suid-Afrika, maar...
Towards a better understanding of entomopathogens for insect biocontrol
Insects are prone to infection by various microbes, termed entomopathogens (from the Greek: Entomon = insects and pathos = suffering).
These disease-causing entities contribute to the suppression of insect pests through not only natural infection,...
Managing the local risk of fall armyworm infestation in maize
The fall armyworm (Spodoptera frugiperda) has now been present in South Africa for three cropping seasons. This pest has its origin in the tropical and sub-tropical areas of South America and the most southern...
Aktiewes – van a,b,c tot 1,2,3
Die Herbicide Resistance Action Committee (HRAC-SA) bestaan uit verteenwoordigers van alle chemiese maatskappye in Suid-Afrika en skakel in onder HRAC-Global. Die oorkoepelende doelwit van HRAC-Global is om opbrengste en kwaliteit van alle gewasse te...
Biosecurity systems under pressure
It is estimated that pests and pathogens destroy between 10% and 40% of food production globally. There are ways to deal with this problem, starting with biosecurity and plant health management systems.
But this is...
The South African Sclerotinia Research Network: Finding management solutions to a devastating pathogen
September 2018
LISA ROTHMANN, Plant Sciences Department, University of the Free State and MIEKIE HUMAN, research assistant, Grain SA
Sclerotinia sclerotiorum is the causal agent of Sclerotinia stem rot on soybean and Sclerotinia head rot on sunflower....
‘n Kykie na insekplae op MIELIESAAILINGE
September 2018
ELRINE STRYDOM, LNR-Graangewasse, Potchefstroom
Gedurende die ontkieming en opkoms van ‘n mielieplantjie is dit belangrik dat ‘n mens bewus sal wees van insekte wat skade daaraan kan aangerig en om pro-aktief op te tree...
Keeping an eye on RLS
Tarekegn Terefe,
ARC-Small Grain,
Bethlehem
Nokulunga Mzimela,
ARC-Small Grain,
Bethlehem
Kelly Breeds,
CenGen (Pty) Ltd
Renée Prins,
CenGen (Pty) Ltd
Ramularia leaf spot (RLS), caused by the fungus Ramularia collo-cygni (Rcc), was identified for the first time in South Africa in 2015. This important...
Overlapping false armyworm populations…a possible reason for outbreaks
After one year of monitoring flight patterns of false armyworm moths and testing a climate-based temperature model, new information about this insect is revealing some interesting facts.
The false armyworm (Photo 1) has for many...
Volhoubare gewasproduksie deur grondverbetering
Vrugbare grond is die basis vir gesonde plante met ’n hoë gebruikswaarde.
Die doelwitte van ’n grondverbeteringstrategie sal die volgende insluit:
Die volhoubare verhoging van die nettoboerdery-inkomste per eenheid. Dit beteken dat óf die inkomste...
