@article{Wolcott_1950, title={Control of the soil-inhabiting grubs of Puerto Rico}, volume={34}, url={https://revistas.upr.edu/index.php/jaupr/article/view/12829}, DOI={10.46429/jaupr.v34i4.12829}, abstractNote={Gamma isomer of benzene hexachloride is almost as effective in killing third instar white grubs (<em>Phyllophaga</em> spp.) in Puerto Rico as is aldrin (Hyman 118), applications of either at the rate of 2 lbs. per acre resulting in commercial control. It is much inferior in causing the mortality of just-hatched weevil grubs of <em>Diaprepes abbreviata</em> L., in laboratory tests, merely delaying the rapidity of development at 10 lbs. per acre. Aldrin in all tests killed all <em>Diaprepes</em> grubs at one-twentieth of this concentration, at 0.5 lbs. per acre. As neither the amount of gamma isomer necessary to kill <em>Diaprepes</em> grubs, nor the maximum amount of aldrin in soil in which they can survive was determined, the disparity in effectiveness of the two insecticides is even greater than these tests indicate.}, number={4}, journal={The Journal of Agriculture of the University of Puerto Rico}, author={Wolcott, George N.}, year={1950}, month={Oct.}, pages={333–337} }