CorseMachin
Brown splotches on rhubarb may be the result of pesticide residue, salts, or a combination of both. These may begin as yellow patches seen upon the leaves, gradually becoming reddish brown. Also, if your rhubarb has brown spots, the culprit may just be a healthy growing rhubarb.
- How do you treat rhubarb fungus?
- What's wrong with my rhubarb?
- What causes spots on rhubarb stalks?
- Why do rhubarb leaves go brown?
- When can you not eat rhubarb?
- Why is my rhubarb turning yellow and dying?
- Can you over water rhubarb?
- Should I cut off rhubarb flowers?
- How do you revive rhubarb?
- Will RoundUp kill rhubarb?
- Why is my rhubarb turning red?
- Will ants kill rhubarb?
How do you treat rhubarb fungus?
The best way to control leaf spot is to remove all infected leaves as soon as you notice the blemishes (do not throw them in a compost). The use of fungicides isn't recommended; not only is cutting back the contaminated plant parts enough to contain an outbreak, but harmful residues could end up on the edible stalks.
What's wrong with my rhubarb?
Due to the cool, wet spring, we have seen a number of diseased rhubarb samples in the Plant Disease Clinic. Most of these samples are infected with Ascochyta leaf spot or anthracnose stalk rot. First indications of this disease are wilted leaves and large, water-soaked lesions on the stems. ...
What causes spots on rhubarb stalks?
Cause Ascochyta rhei and Ramularia rhei, fungi that overwinter on old rhubarb leaves and stalks. These fungi also can spread through infected rootstock. Leaf spots are common on field-grown rhubarb west of the Cascade Range due to frequent rains in March and April when leaves and stalks are actively growing.
Why do rhubarb leaves go brown?
It is possible that the browning leaves are a fungus, and if so, it is better to remove the affected leaves so the condition will not spread. Here are a couple of pages that deal with pests and diseases which sometimes affect rhubarb plants.
When can you not eat rhubarb?
Rhubarb stalks are best if harvested in spring and early summer, but they do not become toxic or poisonous in late summer. They can be eaten all summer long. There are two good reasons not to eat them in summer. They tend to get woody in late summer and don't taste as good.
Why is my rhubarb turning yellow and dying?
Rhubarb needs soil with good drainage, especially when grown in areas that experience high levels of humidity. Yellowing and wilting leaves could simply be a lack of water at crucial times. Then again, the soft stalks may also point to a fungal disease. Check the base of the crown for white fungal growth or rot spots.
Can you over water rhubarb?
Summer: Keep an eye on your rhubarb plants and water them during dry periods. You don't want the soil to completely dry out. Rhubarb that's grown in containers will need to be watered much more often in order to keep the compost moist.
Should I cut off rhubarb flowers?
Answer: Rhubarb flowering stalks should be promptly pulled and discarded if you want to keep the plant in good production. The flower stalks take a lot of energy to produce, thereby they reduce plant vigor and next year's production.
How do you revive rhubarb?
In future years, you can help your rhubarb early in the spring. Rake the straw mulch away from the plant and put down 2 or 3 inches of composted manure around the plant in a ring. Do not cover the crown where the leaves will emerge. Then add the straw to the top.
Will RoundUp kill rhubarb?
There are a few reliable ways to kill rhubarb. Oddly, applying RoundUp is not among them. Others, as some suggested here (motor oil, salt) will seriously damage your soil for some time to come and injure any other plants whose roots enter that soil. ... Keep the area soaked with water for a few weeks until the roots rot.
Why is my rhubarb turning red?
If the whole leaf seems to be turning red -- or worse, several of the leaves -- the plant probably is infected with bacteria called Erwinia rhapontici. ... You will not be able to plant rhubarb in the same spot again, and you will need to control insects in the area to avoid spreading the bacteria to other rhubarb plants.
Will ants kill rhubarb?
We have 2 large rhubarb plants in our vegetable garden. What can we safely use to get rid of the ants that keep making their hill underneath, almost (but not quite) killing our rhubarb plants? For the most part, ants do not cause any serious problems in gardens.
