Some small victories found for a few days this week as rain held off in some areas longer than expected to find more planting opportunity. However, this was still very limited and progress remains well behind average.
Planting progress by year is in the figure below. This year is starting out very similar to 2013 and 2020, which is to say similar to the two slowest progress years since 2010. We’re likely less than 10% planted at this point (we were at 4% on Monday 4/11).
More rain is forecast for this weekend, and it does look like we’re in for heavy rain. At some point it can’t get any wetter, it can only get deeper. The longer-term outlook suggests that a week from now a window may open up to allow for some real planting progress.
Fingers crossed for that window to finally emerge.
Table 1. U.S. Rice Planting Progress, 2022.
April 10, 2022
When to Use Combinations of Insecticide Seed Treatments in Rice
Over the past 5 years we have talked a lot about combinations of insecticide seed treatments and the benefits of combining different seed treatments for control of grape colaspis and rice water weevil. We have been comparing combinations of a neonicotinoid seed treatment (CruiserMaxx Rice or NipsIt Inside) with a diamide seed treatment (Dermacor X-100 or Fortenza) for multiple years now.
In our studies when we compare the neonicotinoid seed treatments CruiserMaxx Rice and NipsIt Inside we have observed very little difference in efficacy between the two products. In other words, they both perform equally well. Particularly on grape colaspis.
AgFax Weed Solutions
They also provide control of rice water weevil, but neither provide as great of control as Dermacor or Fortenza. In contrast, Dermacor does not provide adequate control of grape colaspis.
Another thing to remember is that CruiserMaxx Rice and NipsIt Inside protect rice for about 28-35 days. Dermacor on the other hand, provides protection 60-70 days after planting or more, with similar results observed for Fortenza. There are some price differences between the two chemistries, and of course if you go with a combination it will be more expensive (Table 2).
With combinations of one of the neonics and one of the diamide seed treatments we consistently see an increase in control of rice water weevil, better yields, and increased net returns compared to a neonic or diamide alone (Table 3).
We have seen some increased control when combining CruiserMaxx and NipsIt, but it is less consistent than combinations including a diamide seed treatments.
The question we have been asked a lot recently is: Do I need this combination on every acre? The short answer is no, but it’s dependent on multiple factors. Planting date and soil texture are the two biggest factors is making this decision.
For rice planted in April, that is more likely to sit in the ground longer and take longer to get to flood, the addition of one of the diamide seed treatments will help tremendously with rice water weevil control. In this planting window there is a much higher likelihood of the neonic seed treatments running out of gas before the flood is applied, which will lead to a reduced control for rice water weevil.
For rice planted in May, a neonic seed treatment will typically suffice. At this point rice is usually coming out of the ground quickly and we can manage to get to flood within the 28-35 day window that the neonics last.
Soil texture is another major factor to consider when making seed treatment choices. Soil texture will dictate whether or not grape colaspis will be a concern. Grape colaspis do not occur in heavy clay soil, which is typical rice ground in large portions of Northeast and Southeast Arkansas. In these areas a diamide seed treatment for April plantings, or neonic seed treatment for May plantings should suffice.
Grape colaspis is very likely to be found in our finer, loamier soils throughout the Grand Prairie and White River regions, so regardless of planting date we have to have one of the neonic seed treatments on our seed to protect it.
The addition of a diamide seed treatment provides other benefits than just rice water weevil control. This chemistry is excellent on caterpillar pests. We have observed control of fall armyworm 80 days after planting with both diamides. This could have been highly beneficial for a lot of folks last year.
We have also observed decreased feeding from rice billbug and increased yields in row rice when combinations of insecticide treatments are used. We are seeing an uptick in rice billbug pressure as we continue to maintain a large row rice footprint in the state. We would suggest if you are planting row rice to add a diamide to your seed.
The bottom line is we need seed treatments in rice to stay profitable, and while it may cost more money, combinations of insecticide seed treatments will pay for themselves in early planted in rice. We can still see benefits in later planted rice from the combinations, but in most cases they are not needed.
Production prices are extremely high right now, so we need to be mindful of how we spend our money and be sure to put these combinations of insecticide seed treatments where they belong.
Table 2. Estimated cost of insecticide seed treatments per acre for hybrid and conventional rice.
Insecticide Seed Treatment*
20 lb/a seeding rate
60 lb/a seeding rate
|*These prices do not include a fungicide package|
Table 3. Rice water weevil control, yield benefits, and net returns with insecticide seed treatments in rice, 2018-2021.
Insecticide Seed Treatment
|Fungicide Only||30.7 a||182.9 e||910.1 d|
|CrusierMaxx Rice||15.4 b||200.6 bcd||100.9 abc|
|NipsIt Inside||13.7 bc||197.7 d||993.6 bc|
|Dermacor X-100||6.0 d||203.6 abc||1017.3 abc|
|CruiserMaxx Rice + Dermacor X-100||5.9 d||208.5 a||1031.2 a|
|NipsIt Inside + Dermacor X-100||7.6 d||205.4 ab||1020.1 abc|
|Fortenza||5.7 d||202.4 bcd||1010.7 abc|
|CruiserMaxx Rice + Fortenza||6.3 d||204.5 abc||1011.0 abc|
|NipsIt Inside + Fortenza||5.9 d||205.5 ab||1024.0 ab|
|CruiserMaxx Rice + NipsIt Inside||9.8 cd||199.8 cd||989.4 c|
Means followed by the same letter are not significantly different at an alpha level of 0.05
†Rice water weevil/3 cores