Plant growth regulators (PGR's) [thidiazuron (Dropp®) N-phenyl-N' -1,2,3-thiadiazol -5 ylurea, 50% wettable powder, Nor-Am Agricultural Products, Inc., Naperville, IL, and ethephon (Prep®) a- chloroethyl phosphonic acid Rhone - Poulenc Ag Co., Research Triangle Park NC] were applied to reduce late- season fruiting forms as a source of host material for developing overwintering PBW populations. Combinations of ethephon and thidiazuron or thidiazuron alone were more effective than ethephon alone for reducing late -season immature green bolls. None of the PGR's alone or in combination affected yields. Highest rates of defoliation occurred after applications of thidiazuron. The data suggest that temperature thresholds for highest plant growth regulator activity occur.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/208370 |
| Date | January 1991 |
| Creators | Chu, Chang-chi, Henneberry, Thomas J., Bariola, Louis A., Deeter, Brian |
| Contributors | Silvertooth, Jeff, Bantlin, Marguerite, USDA-ARS, Western Cotton Research Laboratory, Phoenix, AZ, Rhone Poulenc Ag Co., Wickenburg AZ |
| Publisher | College of Agriculture, University of Arizona (Tucson, AZ) |
| Source Sets | University of Arizona |
| Language | en_US |
| Detected Language | English |
| Type | text, Article |
| Relation | 370087, Series P-87 |
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