| Autor: |
Blinka, Eric, Bacheler, Jack S., Roberts, Phillip M., Greene, Jeremy K., Toews, Michael D., Mott, Dan W., Van Duyn, John W., Bradley, J. R. |
| Zdroj: |
Proceedings of the Beltwide Cotton Conferences: Cotton Insect Research & Control Conference; Jan2008, p1258-1261, 4p, 9 Graphs |
| Abstrakt: |
In 2006 and 2007, a series of seven "regressive spray" tests were conducted across North Carolina, South Carolina, and Georgia. Two tests were conducted in NC in 2006 and 2007, two tests in GA in 2007, and one test in SC in 2007. The purpose of these test were to evaluate the relationship between stink bug populations and yield, and to validate findings of a "progressive spray" treatment environment. All tests were conducted on Bollgard II cotton verities. Test sites consisted of plots six to eight rows wide by 50 to 100 feet long with four replicates. All spray treatments began at anthesis, except an untreated check plot, with a high rate of dicrotophos (Bidrin 8E @ 0.5 ai/acre) plus a pyrethroid. Each week, an additional plot was removed from the spray schedule. This continued until the seventh week and final single plot spray. Just prior to boll opening, 25 random bolls from three sites were collected to estimate the amount of stink bug feeding damage. Following defoliation of the cotton, plots were mechanically harvested and yield data recorded. The results show no yield differences among treatments. High variation in yield was observed among similarly treated replicates at each site. These results do not follow those results found under a "progressive spray" environment. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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