John Bonkowski

@MSUDiagnostics When there is a will there is a way.

Diagnostic samples come in all sorts of packages…but bugs in a bottle? That’s a new one for us! 🪳 🍼😱

@bobkemerait Are the small bleached white spots curvularia or something else?

He called me about southern corn rust on late-planted corn; I told him to look for “tar spot”, the new disease. He said he hadn’t seen it before. 2 minutes later I get a text, “Is this it?” Yeah.... it is. Another GA county, Dooly, positive for tar spot. UGA Extension

Future tar spot mgmt is going to require multiple tools, we are just beginning to identify best options- hybrid resistance, fungicide timing & efficacy, and water management are all important. It is all about the disease triangle🔺️@badgercropdoc @MartinChilvers1 @AlbertTenuta

@RobynRobertsPhD #notfungi

Everything Is Faster: How Do Land-Grant University–Based Plant Diagnostic Laboratories Keep Up with a Rapidly Changing World? annualreviews.org/doi/full/10.11…

@SouthALPlantDoc @MoCoGardeners I love that description - I categorize plants like " can't tolerate," "doesn't like'" and "doesn't mind" wet feet. Never slinclude "like's" because I guess that gets into mangrove territory.

See @MoCoGardeners, I am not the only person that uses the highly technical and scientific term "wet feet"!

@MUplantclinic During hot summers tulip trees can develop necrotic spotting due to heat stress. Chlorois and defoliation can occur, but may not harm tree vigor. If dieback is observed, there is a borer of tulip that bores into the base of the trunk you could look for to rule out.

Saw this tulip tree in my neighborhood. Interesting leaf yellowing without too much dieback. It doesn't resemble anthracnose. Could be environmental? Any ideas? Thanks

Oh What a Tangled Web They Weave! - Purdue Landscape Report purduelandscapereport.org/article/oh-wha…

Here is a summary of the awards our Purdue Weed Science Grad Students won at the @NCWeedScience Weed Science Contest. Nice work! I also want to compliment my former grad student, @NDSUWeeds for his excellent work in hosting the contest! @PurdueAg @PurdueBPP

@alabamaED @MUplantclinic @bobkemerait This is a situation of same common name for the disease for different pathogens for either different hosts or geographic locations

@MUplantclinic @bobkemerait Southern blight on soybean. Sclerotia vary from white to tan to reddish-brown to brown

Georgia’s peanut farmers are likely to start seeing a lot more of this stem rot/white mold as heat and humidity ramp up this week. Get after it. White mold doesn’t sleep. UGA Extension

@francis23922394 @LucasAHaag @lancasarah @msuerinhill canr.msu.edu/news/plant-ide…

Are there any apps for iPhone or iPad to identify weeds in the field? @LucasAHaag @lancasarah

Plant pathogen diagnosis is the proper identification of the biotic disease-causing agents, which is one of the most important aspects of disease control measures as well as a fundamental component of successful agriculture.

@MSUextPlantLab I thought that might be what was growing, but didn't want to assume. Thanks!

@PlantDocBonk It was sporulating profusely on anthers and stamens. If you enlarge the photo of the flower you can see little white tufts on those parts.

Got blackberry flowers but no fruit? Could be rosette, aka double blossom, caused by the fungus Cercosporella rubi. Many thornless cultivars are resistant. Thorny varieties are not. Wild blackberries and dewberries are sources of inoculum. #MSUext

@EntoMorgan @kimscottokelley @SFRC_UF @UFWildlife "Here we have the O'Briens, the McArthurs, the McCartys, and, the black sheep of the group, the O'Possums"

@EntoMorgan @kimscottokelley @SFRC_UF @UFWildlife Whenever I see "Opossum" written out I immediately say "Oh-Possum." I do the same with Oedipus. Like opossum, Oedipus does not come into conversation that often for me. "Oh-Edipus"

@dsmuelle @MartinChilvers1 Didn't go to a corn maze, but found what looks like some tar spot at the zoo. My son (1yr old) was trying to eat it right after I snapped a photo.

#tarspot hunting in the corn maze at #centergroveorchard. #foundit!