Applied 1,3-D fumigation for our potato trials @UF_HAEC yesterday. We are testing conventional and biological nematicides for sting nematode management. Various combinations, timings, and application methods that will go out closer to planting.
See our latest publication in Agronomy Journal testing resistant peanut cultivars against peanut root-knot nematode. There are a number of cultivars that are highly resistant to this nematode. This was a collaboration with Dr. Hardeep Singh's lab.
acsess.onlinelibrary.wiley.com/doi/full/10....
See our latest article in Journal of Nematology on how rotating winter carinata with summer cash crops impacts reniform nematode management. By Rebeca Sandoval-Ruiz from her PhD research in my lab:
reference-global.com/article/10.2...
Harvested our last summer trial of the year yesterday. This was a cotton trial at NFREC-Quincy testing in-furrow nematicides and resistant cultivars against reniform nematode.
Galling from root-knot nematode is present and severity/frequency varies by plot. Severe galling on stunted plants suggests reduced stand is from root-knot nematode.
At mid season, we're assessing nematodes in soil/roots, galling, stand, and canopy vigor to evaluate nematicides.
Our carrot nematicide trial at Live Oak at 8 weeks after planting. Obvious differences in plant stand and foliage among treatments.
Root-knot nematode is the target Symptoms are likely from this nematode as the untreated looks poor and there are root symptoms (next post).
Earlier this week, I enjoyed learning from colleagues as part of the joint meeting of southern and western USDA multi-state nematology projects.
Dr. Oyetunde talked about a couple projects from our lab.
Carrot nematicide trial at Citra. Parallel to our Live Oak trial, but planted a week later.
We are also seeing differences in plot growth among plots in this trial. Root-knot nematode is the target.
Carrot nematicide trial @nfrec_sv at 6 weeks after planting. Carrot roots are starting to form and differences in plant stand and vigor among treatments are apparent. Testing for management of root-knot nematode.
Videos from digging and harvesting this trial last week
Severe infestation of peanut root-knot nematode in our peanut trial @ufifasnfrec. Symptoms on vines as well as galling on pods and roots.
Carrot trial at Live Oak testing nematicides for management of root-knot nematode. At 4 weeks after planting, there are differences in plant stand and vigor amoung treatments.
Likely due to nematode management as the untreated is poor. Upcoming nematode assessments will inform.
We are comparing cotton cultivars resistant and susceptible to reniform+root-knot nematode within the long-term sod-based rotation @ufifasnfrec. Post-harvest, resistant is clearly taller than susceptible at this site with reniform nematode.
In this trial we are testing peanut lines for resistance to peanut root-knot nematode. After digging, we rated pods/pegs and roots for galling from root-knot nematode (pictured).
Another day another peanut trial harvest. We dug and harvested our peanut trial at Citra in the same day due to rain in the forecast. Commercially, there are downsides like increased drying cost & more pod loss/damage, but less important for our situation.
12 days after planting for our carrot nematicide trial @nfrec_sv. Even up close, they are still at the "squint to see them" stage.
We also assessed pods and roots for galling from root-knot nematode. Raised galls were infrequent. Lots of dark lesions on pods, which can be lighter root-knot, but may also be caused by other factors. Highlights importance of sampling to determine nematode presence.
Yesterday we dug out first peanut trial of the year at NFREC-SV. Testing efficacy of some conventional and biological nematicides for management of peanut root-knot nematode.
Yesterday we planted the second location of our carrot nematicide trial. We are testing various conventional and biological nematicides for management of root-knot nematode.
We applied some nematicides by watering can to mimick application through overhead irrigation.
Carrot planting @nfrec_sv. We are testing nematicides for root-knot nematode control. After planting, we applied some liquid nematicides by watering can to mimick application through overhead irrigation.
Symptoms of root-knot nematode infection on peanut from one of our trials. Symptoms often come on late, so now is a good time to be checking to plan management for future years.
Collected root samples to assess peanut root-knot nematode infestation on various peanut cultivars in this trial at Citra.
7 weeks after planting. Pods are forming and there are subtle differences amoung cultivar canopies.
Foliar damage and root galling from root-knot nematode on soybean at NFREC-SV. Intent is to increase root-knot nematode populations before a late summer carrot trial.
7 weeks after planting for our peanut trial @nfrec_sv. We are testing in-furrow nematicides and a couple cultivars for management of peanut root-knot nematode.
Pegs and pods are forming and seeing differences in canopy size/stand amoung plots.
Checked cotton stands in our reniform nematode trial @ufifasnfrec. Treatments are combinations of various cultivars with or without an in-furrow nematicide.
We did see differences amoung cultivars, likely due to vigor of particular cultivars/seed lots.
As part of our in-house peanut extension training, we toured the small sheller at NFREC-Marianna and a commercial sheller.
Learned a lot about how shelling factors influence production.
We pulled mid season soil and root samples from our cotton trial @nfrec_sv to test efficacy of conventional in-furrow nematicides at managing guava root-knot nematode.
There are small galls on the root system. The size and number of galls increases with time and varies by crop.
Comparing reniform nematode resistant and susceptible cultivars within long-term crop sequences in trial @ufifasnfrec.
At 6 weeks after planting, canopy size is much bigger in resistant than susceptible cultivar. Also differences amoung crop sequences.
This a uniform multi-state test that researchers throughout the cotton-growing belt will conduct. Through National Cotton Council.
Yesterday we planted our final summer trial of the year, a cotton trial @ufifasnfrec. We are testing cultivars with combinations of thryvon and multi-nematode-resistance as well as in-furrow fluopyram nematicide for reniform nematode management.
