Analysis
At the first measurement, there were no larvae of any kind. It was the third day of the buckets being out. While taking measurements I was bitten many times by mosquitoes, so I knew they were in that area. However, there were a lot of dead bugs in a few of the buckets. The vinegar collected the most bugs, the oil had the second most, and hose water was third. The bleach had a few stray leaves that have been turned white. The salt water buckets had acorns, twigs, and leaves floating in it. Interestingly, the acorns were suspended in the mixture and stayed that way for many days.
On the 6th day and before the second measurement it rained very hard. The buckets were partially shielded by large oak trees, but the mixtures were still disrupted. It also rained on the 7th day, just as hard. Still, all buckets looked close to the same as they had on the day the mixtures were created. When the second measurement was taken, on the 6th day, the vinegar bucket had collected even more dead bugs. In another, there was a mosquito stuck in the surface tension, still moving. All other bugs and mosquitoes had died or were not moving. In only one of the vinegar buckets, there were approximately three dead mosquito larvae. These were at the bottom of the bucket. The buckets containing oil had turned cloudy, but still contained dead bugs. The hose water buckets had collected a few more bugs, but very few. The bleach and salt water buckets had stayed the same, perhaps collecting a few more leaves. The bleach had eaten away at the older leaves. In none of the buckets were there any live larvae or visible eggs of any kind.
On the ninth day and third measurement, not much had changed. It had not rained since the seventh day. Following the trend, more mosquitoes and various bugs had been caught in all three of the vinegar buckets. There were no new larvae in the vinegar buckets. What had been observed as larvae previously could have been paled bits of leaf. A large moth (nickel sized) had drowned in the oil bucket. Not many new bugs had appeared in that bucket. In the salt water and bleach mixtures there was no change, as expected. There was also a very minuscule change in the hose water bucket: only a couple new bugs. During the last two measurements I did not receive any mosquito bites. The weather was about to get “colder” (very high 60’s).
In another part of the space, around a wall and in the sun, there was a large 5 gallon bucket that had been there for a few months. The water was murky and the majority of the surface was taken up by a large floating mass of decomposing moss, leaves, sticks, and other plant matter. It smelled very bad. Around the edges of the mass and the edges of the bucket were a very large number of larvae from an indeterminate species. They did not look like mosquito larvae, but they could have been.
Conclusion
The data did not entirely support or deny the hypothesis. Even in the control, no living larvae had been observed. The salt water bucket kept away almost all bugs. As did the bleach, but because the bleach-water destroyed the leaves that fell into it, this mixture would not be suitable for wide-spread, long-term use in nature. The oil bucket seemed to trap anything that landed in it, but bugs were not very drawn to the substance. The vinegar, mixture, however, not only attracted masses of bugs and mosquitoes but it also trapped them. The vinegar also, possibly, killed mosquito larva.
This experiment would have done better in June, July, or August, because that is peak mosquito season.
This experiment could be improved upon by repeating the same experiment, but leaving buckets containing plant matter out much longer than a few weeks.