DOWNY MILDEW
Daily irrigation, high humidity and relatively low temperatures favour the development of downy mildew, which can grow rapidly on plants of the cabbage family. (The same can occur on other leaf diseases that target tomatoes and peppers.)
Downy mildew attacks the underside of leaves. Because the cotyledonous leaves (the two embryonic leaves that grow from the seed) are very close to the growing medium, it is difficult to spot the problem and treat it. You can use a systemic product (absorbed into the plant), but this should be done only in an emergency, as the fungus can become resistant to the active ingredient. The first systemic product for downy mildew on brassicas was Ridomil, which worked well. But due to overuse, resistance to it grew rapidly.
この記事は Farmer's Weekly の August 28, 2020 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、8,500 以上の雑誌や新聞にアクセスしてください。
すでに購読者です ? サインイン
この記事は Farmer's Weekly の August 28, 2020 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、8,500 以上の雑誌や新聞にアクセスしてください。
すでに購読者です? サインイン
'SA agriculture adapts to challenges and change'
Although the agriculture sector’s contribution to South Africa’s GDP is calculated at under 3%, its extended impact on GDP stands at between 10% and 12%.
Solutions to common cannabis cultivation challenges
Cultivators can improve output, quality and profitability while supporting the sustainability and prosperity of the cannabis industry by implementing best practices in pest management, environmental control, nutrition management, genetic selection, and harvesting procedures.
Training kit boost for small-scale poultry farmers
A new series of training materials to help small-scale poultry farmers improve their methods and incomes has been released by the World Poultry Foundation (WPF).
Eastern Cape Livestock Identification and Traceability System launched
New technology could be the key to help farmers put an end to stock theft, writes Jyothi Laldas.
State-of-the-art abattoir handed over to farmer
The KwaZulu-Natal (KZN) Department of Agriculture and Rural Development (DARD) recently handed over a multimillion-rand abattoir to a Hluhluwe farmer.
Vineyard School helps workers build skills
A new four-day course urges employees to think outside the box to ensure their employability, writes Glenneis Kriel.
SAFDA hosts sugar regulations imbizo
A milestone has been reached on the sugar industry's journey to transformation, writes Jyothi Laldas.
Thailand wants to recriminalise cannabis after earlier unbanning it
The government of Thailand has announced that it will be relisting cannabis as an illegal drug by the end of 2024, two years after lifting the initial ban.
Climatic conditions result in challenging wine grape season
The Western Cape's wine production is expected to be lower this season, reports Glenneis Kriel.
UK promotes trade and investment at Nampo
The 2024 Nampo Harvest Day, themed ‘Agriculture in a Digital Age’, attracted more than 900 national and international exhibitors, with 400 prospective exhibitors on a waiting list. This year the UK also formed part of the event.