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Archive for the ‘Location 10 St. Landry’ Category

If you are wondering why I’ve been a little quiet lately, it’s because we’ve been busy cutting test plots and gathering harvest data.  After long days in this horrendous heat, it’s hard to find a desire to sit at a computer and write. This morning it was so dark outside that I tried to fool myself into think it was a nice, cold winter storm – no such luck. 
I’ll wait until all the numbers are in to make any comments about the effect of treatments on yields.  In the meantime, I thought you might like to see some equipment in action.  The best part of harvest is that it really is a gathering of friends.

Dean Reed (Helena), Sunny Bottoms (HorizonAg) and Vince Deshotel (LSU AgCenter) waiting in the shade near the weigh wagon. Charlie was busy trimming the edges so we could cut our passes.

 

The first step is to trim the edges of the field so that we are harvesting from a measurable area and can calculate accurate yields. 

Combine in the background is trimming the edges, and in the direct line of the camera you can see that the front edge has been trimmed to make a clean starting line for the pass.

 

The second step is to run a pass up the treated area. 

The combine is about to finish the first pass in the untreated area.

 

Along the way, the header is cutting the head (panicle) off the rice plant and separating the hull (containing the grain) from the straw.  The grains are collected in the hopper and the straw is ejected out the back of the combine. 

Rice panicle and straw being cut and pulled into the combine - there is a rotating pair of belts that moves the grain and stalk into the combine for sorting.

 

Rice entering the combine hopper - sorry some of these pictures are dusty, but this is dirty work!

 

After the pass is completed, the rice is transferred from the combine into the weigh wagon. 

Combine lined up with the weigh wagon to empty the rice out of the hopper and calculate the yield.

 

The weight, grain moisture, and temperature of grain are recorded.  Then the contents of the weigh wagon are emptied into a grain cart to get ready for the next round. 

The rice is emptied from the weigh wagon into the grain cart.

 

In the meantime, someone else has the physical job (which was tough in that extreme heat yesterday) of measuring the length of the harvested area.  This is measured with a wheel.  Dean Reed was walking the wheel in this picture. 

Dean Reed using a wheel to measure the harvested area. 

This process is repeated until you complete the harvest.  

Birds are often attracted to the combine and are real daredevils as they dive and dodge for grasshoppers, frogs and other critters. 

Rice and soybean farmer Charlie Fontenot anticipates that he will be harvesting for more than 20 days straight to get all the rice cut and then roll into soybean harvest.  We thank him for participating in this variety trial and demonstration test.  The rice we harvested will be fertilized and flooded up for second crop. 

Charlie Fontenot operating his Case combine.

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We have finally concluded all of the core sampling for our demonstration test this production season.  We have gathered all the data and Anna conducted a statistical analysis.  In this analysis each location is treated as a replicate.  

Our demonstration test was conducted in all the Louisiana parishes highlighted in purple.

 

We had a total of 15 sites included in our test this year.  We started this season with 5 locations designed to evaluate rww management tactics.  An additional 5 sites were set up to evaluate colaspis management.  We did not have any colaspis infestations in the test sites.  We gained three more weevil test sites that had been planted out either by seed companies or a cooperator, who requested we take samples.  We wound up with a total of 10 locations that were included in the overall data analysis.  More than 500 core samples were processed to generate this dataset – that’s a lot of backbreaking work to pull all the cores and then to wash all that mud from the  roots!  Thanks to our cheerful, hardworking crew for completing this task without complaint.  

We collected weevil cores from all sites 4 weeks post flood.  Our standard method is to take 10 cores per treatment, in a zig-zag pattern across the field, making sure to pull cores from the edge and middle of the cut.  

   

A few trends broke out in the dataset.  In Acadia and Jeff Davis Parishes, we had a relatively light infestation with weevils, except at one location (Lawson Farm) where we had about 10 larvae per core in the untreated check.  In Vermilion Parish we had low to moderate infestations.  In Concordia Parish we had an average of 10 larvae per core in the untreated check.  In Evangeline Parish we had a relatively severe infestation with untreated counts averaging from 10.8 rww larvae per core at the LaHaye farm to 15 larvae per core at the Morein farm site. Our highest population was in St. Landry Parish where we had an average of 21.9 larvae per core in the untreated check.  While, in Tensas Parish (our most northern location) we had an extremely light infestation with zero larvae per core in the untreated check and the highest count of 0.15 larvae per core in the Dermacor X-100 treated cut.  Interestingly at this location, we had a fairly severe infestation in the 2008 production season.  The  graph that follows summarizes the average number of rww larvae per core when we analyzed the entire dataset.  

Average number of rice water weevil larvae per core (calculated from 10 cores per field or cut). Different letters indicate a significant difference in the treatment effectiveness.

 

Overall, Dermacor X-100 provided the best level of weevil control, followed by pyrethroid (either Karate pre,Karate pre + mustangMax on fertilizer post, or Karate post) and CruiserMaxx.  Dermacor X-100 provided significantly better control than the other two treatments.  There was no signficant difference in the core sample average between the pyrethroid and the CruiserMaxx seed treatment. 

Unfortunately, the results from the Hybrid test plots (25 pound or less seeding rate) did not provide any more clarity about the ability of CruiserMaxx to provide effective weevil control at the low seeding rates.  We plan to repeat the demonstration test again next season, particularly focusing on the low seeding rate question.  Mike Stout has some small plot replicated research that may also clarify the question of effectiveness of CruiserMaxx at low seeding rates as currently labeled.  

This was certainly an interesting weevil season, and we learned a lot about weevil management, and just how difficult it can be to scout for adults and properly time insecticide applications.    

We greatly appreciate the support and cooperation of all who are involved with the demonstration test.  Please contact your local county agent, or me, if you have any questions about our observations this season. 

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Today we met with cooperators in St. Landry to look at the differences in stand emergence between the insecticide treated (Dermacor X-100, CruiserMaxx) and non-insecticide treated seed (fungicide only).  This location is a joint effort between LSU AgCenter, Horizon Ag, DuPont and Syngenta.  We are evaluating CL151 planted at a variety of seeding rates (#40, #55, #65, #70, #85, #100).     

Dermacor X-100 treated seed to left of flag, untreated seed (fungicide only) to right of flag.

 

 There was no noticeable difference between the Dermacor X-100 and CruiserMaxx treated seed.  These were both planted at 65 lbs per acre.     

Dermacor X-100 treated seed to the left of flag, CruiserMaxx treated seed to the right. No visible difference in stand at this time.

 

 CruiserMaxx is applied at 3.3 fl oz/100 lbs seed, regardless of seeding rate.  One of the objectives of this test is to confirm that CruiserMaxx provides the same level of rww control at low and high seeding rates.  The seeding rates that we are evaluating include the following: 40, #55, #65, #70, #85, #100.  At this point, there is no real visible difference in stand, except when comparing the high (#100) to low (#40).    

CruiserMaxx treated CL151 - plants are just beginning to emerge from the ground. Planted at 40 lbs/acre.

 

CruiserMaxx treated CL151 seed planted at 100 lbs/acre.

 

 We dug around in the untreated area for a little while to see if we could find colaspis larvae feeding on the roots.  We did not find any today.  We’ll return to take stand counts in about two weeks.  These first few weeks of the test are critical for detecting colapsis damage, if it occurs.    

Scouting for colaspis in untreated check area.

 

In the above picture, Dermacor X-100 treated seed is to the LEFT of the white flag.  Untreated area is to the right of the flag.

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