Albugo candida
White rusting , induce byAlbugo candida , afflict turnip leave and flowers and used to be consider a fungous disease .
The organism has been reclassified and is now no longer a fungus . It is a water mold – a relative of brown algae .
However , it looks and acts like a fungus ! And it still infects turnips !
Photo by Scot Nelsovia PD 1.0.
You will experience if your turnip industrial plant is infected if the tush of the leafage have blank pustule that look like blisters , and the upper side have faint yellow spots opposite the white ones .
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rust do n’t kill their host , but they do n’t do them any favors either . This type of rust is found throughout the cosmos wherever turnips are grow .
Photo by Scot Nelsovia PD 1.0.
As far as plant disease go , white rust on turnip is not commonly a serious disease . The leaves of infect plant life await hideous , but the roots are typically fine .
Unfortunately , there are no fungicides register in the US to control livid rusting on Brassica rapa . You will have to trust on preventive techniques .
We will take the air you through the symptoms and life cycle of this disease and ethnical methods to contain it .
What You Will Learn
Symptoms of White Rust on Turnips
blank rust fungus has both local and systemic symptom .
The local ones present as white pustules on the bottom of the leave that look like chalky white rubble and faint chickenhearted lesions on top . In addition , smaller theme and floral persona can be infected .
This does not always happen , but If the infection goes systemic ( throughout the whole plant life ) , you will see flowers that produce abnormally , are twist , and sterile .
These disturbed flush are have-to doe with to asstagheads . These structures are typically formed on infected plants during periods of prolonged rainfall and footling sunlight .
How the Infection Spreads
spore spread from the pustule , including those produced on cruciferous grass . Wind , worm , or rainfall circulate them to other plant in the same sphere or even in other athletic field .
The transmission is more likely to spread in wet weather that is 60 to 77 F.
Plants can also become septic from buddy-buddy - walled spore called oospore that are make in the staghead and overwinter in plant life debris in the grime .
Another downside of this rust is that it can predispose your plants to develop pubescent mildew(link to turnip downy mould clause ) , another disease triggered by a water mould .
Cultural Controls
The deficiency of fungicides registered to control bloodless rust on turnips limits your options to cultural controls . One of the central ones is to buy gamey timber semen that is bring forth in a juiceless climate !
Since the being can winter in plant dust in the soil , seek to constitute your seed in a well - drain bed that does n’t have any plant residues in it .
It is important to eliminate any cruciferous widow’s weeds like mustard or sheepherder ’s pocketbook near your plants , since they can harbor the disease . If you’re able to , rotate your turnips with a non - cruciferous crop for at least two years to purge the soil of infective spore .
render to understate overhead sparge . That will not foreclose the rust from make disease , but it may minimise its severity .
After you have harvested your turnips , incorporate any continue crop residue into the soil as soon as possible , so it will decompose and abbreviate the chance of the spores exist .
Mitigation is Key
While turnip rust fungus produces hideous lesions on turnip leaves throughout the populace and sometimes lead in distorted flower heads , this being does not kill its horde .
No fungicides are show to control turnip rust in the US , so you will have to swear on cultural ascendancy like planting quality source , ruthlessly cull cruciferous locoweed , and disking flora under after the time of year is over .
With these techniques , you should be capable to minimise your chances of having an infected crop and farm turnips that can be sold with their leaves .
Andif you still need helper identifying a turnip disease infected your patch , then some of these guides may be of aid :
© Ask the Experts , LLC . ALL RIGHTS RESERVED.See our TOSfor more inside information . Originally published August 11th , 2019 . Last updated August 21st , 2023 . Uncredited photos : Shutterstock .
About
Helga George , Ph.D.
