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Simon Lowe, technical advisor at AECI Plant Health, Dr Sifiso Ntombela, chief economist at the National Agricultural Marketing Council and the deputy president of the Agricultural Economics Association of South Africa, Dr Ethel Phiri, lecturer at Stellenbosch University’s Faculty of Agriscience, and Anastasia Smith vegetable farmer in Atlantis in the Western Cape. Photo: Supplied/Food For Mzansi

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Podcast: How to stop downy mildew in its tracks

A plant health expert recommends that farmers regularly inspect their crops for signs of downy mildew. This water mould which attacks plant foliage thrives in colder temperatures but can luckily be treated by applying fungicide

by Vateka Halile
15th Jun 2022
in Farmer's Inside Track
Reading Time: 3 mins read
A A
Simon Lowe, technical advisor at AECI Plant Health, Dr Sifiso Ntombela, chief economist at the National Agricultural Marketing Council and the deputy president of the Agricultural Economics Association of South Africa, Dr Ethel Phiri, lecturer at Stellenbosch University’s Faculty of Agriscience, and Anastasia Smith vegetable farmer in Atlantis in the Western Cape. Photo: Supplied/Food For Mzansi

Simon Lowe, technical advisor at AECI Plant Health; Dr Sifiso Ntombela, chief economist at the National Agricultural Marketing Council and the deputy president of the Agricultural Economics Association of South Africa; Dr Ethel Phiri, lecturer at Stellenbosch University’s faculty of agriscience; and Anastasia Smith, vegetable farmer in Atlantis in the Western Cape. Photo: Supplied/Food For Mzansi

On this episode of the Farmer’s Inside Track, we’re joined by Simon Lowe, technical advisor at AECI Plant Health, who explains how farmers can deal with downy mildew on broccoli and cauliflower.

According to Lowe, downy mildew is a water mould that destroys plant foliage.

“[It] spreads from infected plants. The disease can overwinter (live through the winter) on host crops, wheat, and plant debris,” he explains.

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“The fungus grows best when temperatures range between 10 to 15 degrees Celsius, and then any extended period of damp weather is required to initiate an outbreak of downy mildew.”

How to prevent downy mildew

To prevent downy mildew, Lowe says that it is important for farmers to inspect the leaves of their crops for lesions.

He explains that the earliest symptoms of the diseases manifests as lesions on the leaves, which may sometimes progress to become large, irregular, and numerous lesions.

However, there’s good news. It can be managed by applying fungicide to the leaves as well as to other plants that are already contaminated.

Lowe says If you do happen to eat crops that have been infected with powdery mildew, there’s usually nothing to worry about.

“In some cases, an allergic reaction can occur so it’s not advisable to eat them. The disease can reduce the taste or the nutrients within the crop, so normally it’s also not advisable for livestock.”

On the episode, Lowe also talks about:

  • How temperature impacts the growth of downy mildew;
  • Dealing with downy mildew for broccoli and cauliflower; and
  • How to prevent downy mildew in your crops.

Want to know more? Listen to the full episode of Farmer’s Inside Track.

Option 1: Click here to listen on Spotify (all mobile and other devices).

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Option 2: Click here to listen on any Apple device.

Option 3: Click here to listen on Google Podcasts.

ALSO READ: Winter: Perfect time to plant these veggies

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Tags: AECI Plant Healthdowny mildewSimon Lowewinter crops
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