April 19, 2011- More insects reports from Jeff Davis and Evangeline Parish – chinch bugs, thrips, aphids, and rice water weevil adults, Part 2

5/31/2011 11:30:01 PM

Picture 1. We found a few aphids on some of the plants. It is likely that populations would be higher if they were not being attacked by ladybugs.

Picture 2. Thrips adult on a rice plant leaf blade - we commonly found them on the blade or in the leaf sheath area. It appeared that feeding injury was causing discoloration on the sheath, but this was not confirmed.

Picture 3. Thrips on a datasheet after it hopped off a rice plant. The datasheet is printed in 10 pt font, so you can see the miniscule size of the thrips adult.

Picture 5. Fire ants foraging in the Evangeline Parish test site field.

Picture 6. Fire ant foraging for insects infesting a rice plant -- in this case, it looked like it was searching for thrips.

Picture 7. Ladybugs were also present in the field eating the aphids.

Picture 4. Chinch bug mating pair.

Picture 8. Anna picking blackberries during lunch break – ah, the sweet rewards of field work…

Originally posted April 19, 2011, by Natalie Hummel on Louisiana Rice Insects

As we walked across the field site we noticed many fire ants and also parasitoid wasps, which led us to believe there must have been some insects in the field that these predators/parasitoids were consuming. Sure enough, after some searching we started to find aphids (picture 1), thrips (pictures 2 & 3) and chinch bugs (picture 4). None are present at levels that are causing noticeable injury in the plots, but we will certainly keep an eye on the populations.

In this situation, the fire ants are helping us by eating some of the insects that are attacking the rice – including aphids, thrips and possibly chinch bugs. Of course, they also took a couple of bites out of me as I was attempting to take picture in the windy conditions at the field (pictures 5 & 6).

The herbicides had not gone out yet. They will probably go out today, and so we took a few moments to enjoy a sweet gift of nature – wild blackberries on the edge of the field (picture 8).

Tomorrow we will make some site visits in Jeff Davis where possible colaspis injury has been reported. In the afternoon, we will head to St. Landry Parish to take stand counts at our demonstration site.

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