Ed Sikora

Powdery mildew disease on squash

Powdery mildew disease on squash

Powdery mildew is a fungal disease of squash that causes a white powdery growth on leaves and stems. Fruit are not directly effected but growth may be stunted. Warm dry periods with high relative humidity favor disease development. Manage by using resistant varieties, fungicides & sanitation 🧪

Bringing Darwin’s Botanical Work Into the Spotlight Surveying visitors at a major botanical garden reveals a surprising gap in plant evolution knowledge, and a clear opportunity to close it.

Bringing Darwin’s Botanical Work Into the Spotlight share.google/pmabhSuaMRZ1...

he Department of Plant Pathology at the University of California, Davis is seeking applications for a fulltime, tenure-track Assistant Professor position in Mycology, with a focus on plant pathogenic, symbiotic, or mycotoxigenic fungi and fungal-like organisms (e.g., oomycetes). We are looking for a highly motivated and creative scientist with a strong background in mycology and/or the biology of fungi and fungal-like organisms that interact with plants. The successful candidate will be expected to develop a world-class, externally funded research program that integrates both fundamental and applied aspects of fungal biology within the context of plant pathology. We welcome applicants pursuing a wide range of research topics related to plant-associated fungi, including but not limited to mechanisms of fungal pathogenesis or symbiosis with plants, population genomics and evolution of fungal plant pathogens, plant-associated fungal microbiomes and plant-microbe interactions, and/or one health approaches to fungal diseases and antifungal resistance. Applicants working in other relevant research areas involving pathogenic, symbiotic, or mycotoxigenic fungi or fungal-like organisms that affect plant health are also encouraged to apply. The successful candidate will have significant opportunities for collaboration with faculty in plant pathology, microbiology, genomics, and agricultural sciences, and to contribute to addressing issues of importance to California’s agricultural and natural ecosystems. The appointee primary teaching responsibilities will be teaching Introductory Mycology, an upperdivision lab class, and SAS 30, Mushroom, Molds & Society, a general education class for non-majors. Additional graduate and undergraduate teaching responsibilities may be assigned based on departmental needs and the candidate’s expertise. The department offers modern instructional facilities, including a newly renovated teaching laboratory.

Please repost -- The Univ. California Davis dept of Plant Pathology is hiring a Fungal biologist / Mycologist

Applications due Dec 1

Application portal: recruit.ucdavis.edu/JPF07339

Screenshot shows part of the job posting (with alt-text of the same text)

Thanks

A nematode extracted from the Slocan River, British Columbia, Canada

West Kootenay Tripyla sp. with annotations.

I try to key out a species using Howard Ferris' keys on Nemaplex.
nemaplex.ucdavis.edu/Taxadata/G62...

Bleeding-edge state of the Art
NemRec -- Automatic nematode recognition by image
Site: 168.138.167.251:8080
Needs more images for training. Great effort so far!!!

Comment une forêt peut-elle émettre plus de CO₂ qu’elle n’en capture ? Entre 1990 et 2010, la capacité de stockage des forêts a chuté d’environ 30 %. Tour d’horizon, de l’Amazonie à l’Afrique centrale, en passant par des forêts tempérées et boréales.

Comment une forêt peut-elle émettre plus de CO2 qu’elle n’en capture ?

theconversation.com/comment-une-...

Nice boot. How is Norwich this time of year? I may visit soon

This discovery traces back to the spring of 2018, when I was a postdoc in nikogeldner.bsky.social 's lab. After shifting Arabidopsis seedlings from solid to liquid culture, I observed that the root commensal bacterium CHA0 rapidly colonized Casparian strip–defective mutants.

Soybean vein necrosis virus

Soybean vein necrosis virus

Symptoms caused by Soybean vein necrosis  virus (SVNV) are common in Alabama. SVNV often begins as yellowing near leaf veins that develops into reddish-brown lesions that spread along leaf veins the disease does not cause yield loss spread by thrips insects especially during dry periods #Virus 🧪

YouTube video by wildlife.net Dr Jane Goodall 3 Apr 1934 - 1 Oct 2025 Thank you Jane 💚 tribute by Stewart at Wildlife.net

Dr Jane Goodall 💚
3 April 1934 - 1 Oct 2025

A tribute from Stewart at Wildlife.net
youtube.com/shorts/FnkfZ...

Butterfly

Butterflies-R-Free Saturday: #Butterfly #Nature photography 📷 🧪

Symptoms of soybean vein, necrosis disease on soybean leaves

Symptoms of soybean vein, necrosis disease on soybean leaves

Symptoms of Soybean vein necrosis is showing up in Alabama soybean fields. The virus is spread mainly by soybean thrips. It is more common during drier summers late in season. A 3 year study suggested it was not a yield reducer in Alabama; more of a cosmetic disease 🧪 #Disease #Virus

Bald eagle

Bald Eagle on the move 🦉

Practiced by George Washington a few years ago on his plantation

Sooty mold on cast-iron plants

Sooty mold on cast-iron plants

Cast-iron plants affected by drought & sooty mold. The brown patches on leaves likely a result of a September drought in Alabama. The blacked leaves are due to a type of mold that grows in the honeydew secreted by insects such as aphids and scale. Removing the pest will alleviate the problem 🧪

South Carolina announces new measles case, NY notes wastewater detection

Elsewhere, Israel has now reported 6 child deaths from measles, 4 of them over the past week.

www.cidrap.umn.edu/m...

Taproot decline of soybean

Taproot decline of soybean

Taproot decline caused by the fungus Xylaria necrophora results in yellowed leaves, wilting & premature death of soybean. Foliar symptoms appear as an interveinal yellowing/necrosis. The taproot and lateral sections turn black due to the fungal infection. Control involves crop rotation 🧪

Butterfly

Butterflies-R-Free Saturday: #Butterfly #Insect #Lepidoptera #NaturePhotography #Nature #Saturday 🧪

Puffball

Puffball

Fungi from “Up North” in Wisconsin. Appears to be an old and new family of puffballs. #Fungi #Mushroom ⁦ 🧪

Tomato spotted wilt symptoms on tomato in North Alabama. A plant viral disease. Upper leaves are distorted & turn pale green. Dark spots are often visible on infected leaves. Plants infected early are stunted & produce poorly. Thrips, an insect, transmit the virus #virus #tomato 🧪

Cercospora leaf blight of soybeans

Cercospora leaf blight of soybeans

Cercospora leaf blight is a late-season fungal disease of soybean which appears as a purplish-bronze discoloration on the upper leaves, progressing to leathery necrotic areas. It also causes purple seed stain which impacts seed quality/marketability. Cultural practices can reduce disease severity 🧪

Cercospora leaf light of soybeans

Cercospora leaf light of soybeans

Cercospora leaf blight is a late-season fungal disease of soybean that appears as a purplish-bronze discoloration on the upper leaves, progressing to leathery necrotic areas. It also causes purple seed stain which impacts seed quality/marketability. Cultural practices can be reduce disease severity

Fig. 6. Model diagram of the mechanism of biocontrol of crown gall disease of cherry trees by Bacillus velezensis. The plant growth-promoting rhizobacterium B. velezensis FZB42 can activate the ISR of cherry trees and inhibit the growth of causative Agrobacterium strains by producing four antibiotics (macrolactin, difficidin, bacilysin, and surfactin). ET, ethylene; ISR, induced systemic resistance; JA, jasmonic acid.

Xu Qin et al. investigated the biocontrol effect and mechanism of crown gall disease in Japanese cherry trees by Bacilllus velezensis FZB42, a prototype strain of the plant growth-promoting rhizobacteria. Learn more: https://doi.org/10.1094/PDIS-10-24-2085-RE

Don't pick your pumpkins yet! 🛑 A perfect Halloween pumpkin needs more than just time on the vine. Learn the secrets to checking ripeness, harvesting, and curing for a longer-lasting display.

Find our latest blog here: vegplotter.com/blog/dont-pi...

#Pumpkins #GardeningUK #GrowYourOwn #Halloween

Fish Are Spawning in the Chicago River, Another Sign the Once-Contaminated Waterway Is Rebounding A new study suggests at least 24 species of fish are reproducing in the urban river, adding to the evidence that it is getting cleaner and healthier

www.smithsonianmag.com/smart-news/f...

Assistant Professor of Plant Pathology University of California, Davis is hiring. Apply now!

My department at UC Davis is hiring a mycologist, broadly interpreted. Please repost, share, and consider applying. recruit.ucdavis.edu/JPF07339

Soybean rust detected in a soybean sentinel plot in Elmore Co. Alabama today. I was surprised to find this fungal disease with the dry conditions in the state in recent weeks. I doubt the disease will be a problem for most growers because of its late arrival this year #Soybean #Rust @CropNetwork 🧪

Possibly Brick caps 🧪 🍄