Photosynthesis response of 'Carolina' cu- cumber to simulated and actual striped cu- cumber beetle (coleoptera: chrysomeli- dae) defoliation

摘要

Field studies were conducted in 1995 to compare the photosynthesis response between simu- lated striped cucumber beetle, Acalymma vittatum (F.), defoliation and actual A. Vittatum defoliation in 'Carolina' cucumber. Six simulated defoliation levels (0/100-100/100) were sued over 5 timings of defoliation (first true leaf to harvest). Plots were defoliated with scissors twice each week throughout each timing in- terval, and defined as continuous defoliation. In addition to continuous defoliation, one-time simulated de- foliation treatments were imposed using the same timing treatments but only 4 defoliation levels (0, 25, 50, and 100 /100).