Category : Research and Technology
The Complexities of Grapevine Breeding : Apr / May 2021
There are several challenges that one may be faced with when breeding novel grapevine cultivars. Chief amongst these is the large investment of both time and financial resources without the guarantee of desired outcomes. By Justin Lashbrooke (Researcher, SAGWRI, Stellenbosch University) Prior to the advent of molecular breeding and marker assisted selection there was little […]
UPDATE: Industry-driven evaluation of ARC-bred table grape cultivars : Apr / May 2021
In 2016 SATI reached an agreement with the ARC, which has allowed them to oversee the evaluation of ARC-bred cultivars by industry, for industry. Since then, in partnership with the ARC and Culdevco, SATI has overseen the roll- out of an “industry-driven cultivar evaluation” of ARC-bred cultivars. By Tarryn Wettergreen Establishment of “industry-driven cultivar evaluation” […]
Extension briefs for April and May 2021 : Apr / May 2021
By Hannes Bester, MC Pretorius, Wayne Mommsen and Catherine Savage (Citrus Research International) Integrated pest management (T.G. Grout, S.D. Moore and A. Manrakhan) Phytosanitary pests All the recommendations made in the Extension Briefs for February and March also apply to this period. Fruit fly control in citrus areas is critical due to phytosanitary concern associated […]
The blue-green citrus nibbler : Apr / May 2021
A visitor amongst us By Evans Mauda and Sean Moore (Citrus Research International) Background Chrysomelids, commonly known as leaf beetles, belong to one of the largest families of the order Coleoptera, the Chrysomelidae family. Insects in this family show great diversity, and variation in colour, shape and size. Adults and larvae of these species are […]
CRI Postharvest Webinar 2021 : Apr / May 2021
With Covid-19 still disrupting our lives, CRI was forced to host the very popular CRI Postharvest Workshops online this year. The six two-day workshops held across the country normally attract over 1 000 delegates and is a wonderful tech transfer, networking and social opportunity for packhouses, sponsors and presenters alike. By Catherine Savage Each sponsor […]
Raar maar waar : Apr / May 2021
Rooi kleur-ontwikkeling in pere Deur Wiehann Steyn Tot onlangs het ons min geweet oor rooi kleur-ontwikkeling in pere. Die algemene siening was dat pere in hierdie opsig soortgelyk is aan appels – maar dit is geensins die geval nie. Navorsing befonds deur Hortgro het gewys dat die twee vrugsoorte wesenlik verskil. Rooi kleur-ontwikkeling in pere […]
Rooting for red colour : Apr / May 2021
How rootstock selection affects blush in pears Blushed or red pears made up about a third of cartons of pears passed for export from SA in 2020. Blushed Forelle dominates this segment. It was the second most exported pear and represented a quarter of cartons exported in 2019. Blushed pears have the potential to command […]
Hoe rooier hoe mooier : Apr / May 2021
Behaal só goeie rooi kleur in appels en pere ’n Gebrek aan goeie rooi kleur is dikwels die struikelblok wat vrugte ongeskik maak vir uitvoer. Raadpleeg hierdie handige opsomming van praktiese oorwegings om die beste rooi kleur in appels en pere te behaal. Deur Wiehann Steyn ’n Goeie begin is halfpad gewin Uitvoergehalte rooi kleur […]
Die wenresep vir groen kleur in appels : Apr / May 2021
Gebruik hierdie kontrolelys vir sukses. Deur Wiehann Steyn Groen appels Hulle benodig goeie blootstelling aan lig gedurende die eerste 40 dae na vrugset. Groen pigment — chlorofil — wat in hierdie tydperk opbou sal die uiteindelike groen kleur van die skil teen oestyd bepaal. Ontwikkeling in donker skaduwee Vrugte wat deurlopend in donker skaduwee ontwikkel […]
From canopy to consumer – Eating experience starts with position on the tree : Apr / May 2021
Consumer preferences matter and growers who want to sell fruit need to know what consumers fancy. They tend to choose fruit based on appearance – at least the first time they try it. A good eating experience is what keeps them coming back for more. The challenge for growers is to provide fruit that combine […]
Tasty is in the eye of the beholder – How different plants market their fruit to consumers : Apr / May 2021
Marketers and consumers – we’re talking about humans, right? Wrong. Many plants depend on successful marketing for aspects of reproduction, including seed dispersal. And many seed-dispersing animals are discerning consumers of fruit. But some animals are freeloaders. They consume fruit without any benefit to the plant. How can plants attract the dispersers but avoid the […]
Van Weefselkultuur tot Dubbel-leiers : Feb / Mar 2021
We asked three nurserymen for their views on trends in tree production — and for their top tips on establishing orchards. Steenvrugkweker Christo Stemmet is die eienaar van Stemmet Kwekery buite Montagu. Hulle kweek hoofsaaklik steenvrugbome. V: Wat is die ideale manier om ‘n nuwe boompie te plant? A: Jy moet voor jy plant besproeiing […]