6 results on '"M. P. Zappe"'
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2. Kerosene Emulsion Versus Nicotine Solution for Combating the Potato Aphid
3. Egg-Laying Habits of Diprion Simile Hartig
4. Notes on a Japanese Weevil, Calomycterus Setarius Roelofs, in Connecticut
5. Results of dusting versus spraying in Connecticut apple and peach orchards in 1922
6. Experiments in dusting versus spraying on apples and peaches in Connecticut in 1921
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