I was given a data set that was weevils placed in different soils and monitored for 8 weeks - most had died at that time. A previous study showed that weevils survived much better in soil with oak matter so we did another test. Not super happy with it and I'll explain after I impress you.
So weevils do survive much better with soil associated with oaks - and white oaks are not very oaky - in terms of the amount of tannins they produce. In soil from under a black walnut the weevil larvae are whacked.
Significant results! Yayyyyyyy.
Hold on a moment. Weevil larvae stay in the soil from October until August so why are all ours dead after 8 weeks? I'd say the whole experiment is amiss. Unless of course, millions go into the soil and only hundreds emerge. Nobody freaking knows.