Try for Free
tab list
PictureThis
English
arrow
English
繁體中文
日本語
Español
Français
Deutsch
Pусский
Português
Italiano
한국어
Nederlands
العربية
Svenska
Polskie
ภาษาไทย
Bahasa Melayu
Bahasa Indonesia
PictureThis
Search
Search Plants
Try for Free
Global
English
English
繁體中文
日本語
Español
Français
Deutsch
Pусский
Português
Italiano
한국어
Nederlands
العربية
Svenska
Polskie
ภาษาไทย
Bahasa Melayu
Bahasa Indonesia
This page looks better in the app
picturethis icon
Instantly identify plants with a snap
Snap a photo for instant plant ID, gaining quick insights on disease prevention, treatment, toxicity, care, uses, and symbolism, etc.
Download the App for Free picturethis icon
Continue Reading
Why is My Giant rhubarb Showing Signs of Notch Disease?
Giant rhubarb, also known as Giant rhubarb
Notch is a leaf disease that causes characteristic 'notched' lesions on Giant rhubarb's foliage, reducing photosynthesis and plant vigor. Its impact includes detracting from the plant's aesthetic value and potential growth reduction.

Symptom Analysis

On Giant rhubarb, the main symptoms include irregular notches along leaf margins, yellowing or browning of the affected areas, and in severe cases, defoliation.
Plant disease auto-diagnose & prevention
AI-powered plant doctor helps you diagnose plant problems in seconds.
Download the App for Free

What Causes Notch Disease on Giant rhubarb?

Fungal pathogens
Notch in Giant rhubarb may be caused by specific fungal pathogens that thrive in humid conditions.
Insect feeding
Insects may create notches by feeding on the leaves, which can subsequently become diseased.
Optimize plant health with ideal lighting
Find the best spots for them to optimize their health, simply using your phone.
Download the App for Free

How to Treat Notch Disease on Giant rhubarb?

Non pesticide
Pruning: Remove and destroy affected leaves to reduce the spread.

Water management: Avoid overhead watering to reduce leaf wetness and humidity.
Pesticide
Fungicide application: Apply an approved fungicide to combat the fungal aspect of the disease.

Insecticide use: Use appropriate insecticides to control feeding insects if they are a contributing factor.

How to Prevent Notch on Giant rhubarb?

Cultural hygiene
Maintain plant spacing for good airflow, clean up leaf debris, and disinfect tools.
Resistant varieties
If available, select disease-resistant varieties of Giant rhubarb for planting.
Regular inspection
Monitor Giant rhubarb for early symptoms to manage Notch promptly.
Get tips and tricks for your plants
Keep your plants happy and healthy with our guide to watering, lighting, feeding and more!
Download the App for Free

When is Notch Most Active Period on Giant rhubarb?

The disease is most active in warm, wet conditions when fungal spores are more likely to germinate and insects are more active.

Infectivity

Notch can spread through spores or by movement of insects, but is typically not rapid.

Lethality

While unsightly and damaging, Notch is seldom lethal to Giant rhubarb.

FAQs on Giant Rhubarb

How do I identify Notch disease on Giant rhubarb?
Look for notched leaf edges, discoloration, and potential leaf drop.
Can Notch disease kill Giant rhubarb?
Not typically lethal, but it can weaken Giant rhubarb if left unchecked.
Is Notch on Giant rhubarb contagious?
Yes, it can be moderately contagious through spores and insects.
Can I prevent Notch disease on Giant rhubarb without chemicals?
Yes, through good cultural practices like pruning, water management, and hygiene.
What is the best time of year to treat Notch on Giant rhubarb?
Treatment is most effective during early symptoms, often in warmer and wetter months.
What should I do if I find Notch on Giant rhubarb in my garden?
Prune affected areas, improve cultural practices, and consider fungicide or insecticide treatments if necessary.
Discover 4 Exciting Reasons to Choose PictureThis
Instantly identify plants with a snap
Plant disease auto-diagnose & prevention
Get full care tips and tricks for your plants
Identify toxic plants around you
Download the App for Free
close
close
Your Ultimate Guide to Plants
Identify grow and nurture the better way!
product icon
17,000 local species +400,000 global species studied
product icon
Nearly 5 years of research
product icon
80+ scholars in botany and gardening
ad
ad
Botanist in your pocket
qrcode
PictureThis Ios DownloadPictureThis Android Download
Scan the QR code with your phone camera to download the app