In terms of management, the only viable option at this point is a supplemental spray with a foliar insecticide.
The bottom line of Andrews research is that fields that have received excessive amounts of rainfall and prevented a timely flood will need to be scouted for weevils and populations will need to managed accordingly. His research also showed that excessive water can have an even greater impact of the performance of seed treatments, especially the neonicotinoids Cruiser and Nipsit. However, control was less consistent than earlier flood timings. In general, the seed treatments reduced larval numbers even when the flood was not established until 8 weeks after planting. Andrew Adams, a few years ago that looked at the impact of flood timing on rice water weevil management with seed treatments. Second, older rice is much less susceptible to yield losses from rice water weevil. First, if an insecticide seed treatment was used, the time from planting until flood is going to have an impact on their performance. There are two important considerations in this situation. Because rice water weevil is highly dependent on the presence of a flood to lay eggs, the delayed flood is going to impact their management. There are several things to consider as more acres go to flood.įlood timing has been significantly delayed for a lot of fields because excessive rainfall has prevented getting levees pulled. In fact, it appears that we are experiencing higher than normal populations this year in many areas of the Delta. We have been getting several calls about adult rice water weevil adults and adult feeding in rice that has gone to flood.
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