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. 1999 Feb 2;96(3):980–985. doi: 10.1073/pnas.96.3.980

Figure 2.

Figure 2

Effects of solar UVB on plant tissue attractiveness to thrips. (A) Trifoliate leaves collected from soybean crops grown with (SUN) or without solar UVB (−UVB) (1997 sowing; all cultivars combined) were placed at the center of a soybean canopy that was covered with a −UVB film, as explained in Materials and Methods. The bars indicate the average number of insects found feeding on leaves from −UVB and SUN plants at the indicated times after the transfer. Thin bars indicate SEs; n = 12 independent replicates (each with three trifoliate leaves per UVB pre-treatment). (B) Young fully expanded leaves from −UVB and SUN plants (1995–1996 sowing, genotype PI227687) were offered to captive thrips in a laboratory choice experiment carried out in closed bioassay boxes (40 thrips per box; see Materials and Methods). The bars indicate the average number of insects that had landed on leaves from −UVB and SUN plants 10 minutes after the beginning of the experiment (the thin bar indicates SE; n = 15 independent boxes; insect counts after 2 h gave similar results).