We have a cucumber wilt that is spreading in greenhouses.
I have done some search online and found similar cases in the area (I posted the photos that is similar to the case we have).
Please share your opinion.
Thank you,
Bacteria wilt is pretty common on cucumbers and cucurbits.
The Erwinia trachephilia is vectored by spotted and striped cucumber beetles.
Control is usually addressed by preventing activities of the beetle vectors.
Hi Mustafa, there are many reasons for this symptom on cucumber:
If there are any few random plants infected in GH there are many reasons for that:
1- The most probable reasons for this symptom is Pythium or Phytophthora infection. You should pull up the plant and check the root for any molding and prepare water culture to see the fungus under a microscope.
2- Check for any nematode infection in the root system.
3- it maybe insect damage on the root system.
Thanks
For vascular disease longitudinal cross sections can give insight.
If you have vascular discoloration and you submerge stem in water bacterial oozing with occur.
Root knot nematodes would show nodules or swelling. Nematodes and fungi like Pythium often are found in disease complexes.
In Pythium issues the root tips are particularly affected and the browning and sloughing of the terminal give s shoe string type of symptom.
Look with detail at the stems and dig up the plants washing the soil off the roots observing carefully.
Your soils composition might be deficient in some area. Especially if you are utilizing the same soil year after year with no rest.
If so you might address the issue with natural organic suppliants as organic supplements offer better balance in the long term as opposed to Industrial compounds.
Do you have your cucumber crop in rotation with more plant species? The pathogenic soil fungi that have been mentioned from previous answers may be also the outcome of poor diversity in the soil biology if you do not rotate your crops. The root exuded from your cucumbers may not be metabolized effectively by the soil microflora and their accumulation eventually, may favor the growth of tolerant species of fungi that are pathogenic to your crop species. Good luck!
Fusarium wilt disease which is caused by the Fusarium oxysporum f. sp. cucumerinum is a common disease of cucumber in Iraq. Please have a look at the following link.
http://jebas.org/Jou.Exp.Bio.Agr.Sci/00400425062016/10.18006_2016.4(4).389.397.pdf
Dear Mustafa,,
There are tow wilt disease can be apeared on cucumber in green houses. The first is bactial wilt which caused by the bacteria Erwinia tracheiphila, while the second wilt is fungal wilt which caused by the fungus Fusarium oxysporum f.sp. cucumerinum.
With regards
1.https://daviess.ca.uky.edu/files/20160710_concern_about_cucumber_vines_eah.pdf
2.https://gardening.stackexchange.com/questions/4134/cucumber-plants-wilting-in-greenhouse-but-fine-indoors
3.https://www.hunker.com/13427499/why-are-my-cucumber-plants-wilting-dying
4.http://www.missouribotanicalgarden.org/gardens-gardening/your-garden/help-for-the-home-gardener/advice-tips-resources/pests-and-problems/diseas
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