Imagine this scenario with me: you’re examining your fruit trees, several that you’ve been growing for years.Much to your horror, most of your apples have come down with
06.06.2023 - 20:57 / gardenerspath.com / Helga George
How to Identify, Prevent, and Treat Bacterial Leaf Spot on Turnip Crops Pseudomonas syringae pv. maculicola and Xanthomonas campestris pv. amoraciaeBacterial diseases of turnip leaves are very serious infections.
There are no highly effective controls for them, and once they have infected a field, the diseases can quickly spread throughout a whole field and render the greens inedible.
In addition to black rot of turnip, there are two types of bacteria that cause leaf spots: Pseudomonas syringae pv. maculicola and Xanthomonas campestris pv. amoraciae.
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Prevention is the best bet. Read on to learn how to prevent bacterial leaf spot in turnips.
SymptomsInfections by both types of bacteria start out as pinpoint watersoaked lesions on the leaves. However, the lesions of Xanthomonas start out olive green, while those of Pseudomonas are brown.
As the lesions grow larger and join together, they become yellow at the edges and look like halos. These halos are more noticeable in Xanthomonas infections.
The bacterial leaf spot caused by Pseudomonas is also called peppery leaf spot because the lesions look “peppery.”
When infections are severe, the leaves can become brittle and die.
Conditions That Favor InfectionBoth types of bacteria spread rapidly in wet weather. While the infections typically arise from infected seed, once the bacteria are on the leaves, they can be splashed to new plants by rain or irrigation.
These diseases can also be spread by equipment or even on contaminated boots.
The bacterial leaf spot caused by Pseudomonas is likely to be a problem in the early spring or fall because the bacteria thrive at cooler
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