| Autor: |
Bruce Steward, Kevin Mussett, Jerry Young, Miles Karner, Richard Price |
| Rok vydání: |
1983 |
| Předmět: |
|
| Zdroj: |
Insecticide and Acaricide Tests. 8:199-199 |
| ISSN: |
0276-3656 |
| Popis: |
‘Stoneville 213’ was planted at Chickasha in a Tuttle silt clay loam soil on Jun 14 and at Altus in a Tillman holister clay loam on May 19 at the rate of 18 and 20 lb of seed/acre respectively. The experimental design was a randomized complete block with 9 treatments replicated 3 times. The plots measured 8 rows x 150 ft. Chemical applications were made Jul 14 at Altus and Jul 27 at Chickasha. Applications were made at Chickasha with a John Deere Hi-cycle 6000 sprayer and at Altus with a John Deere Hi-cycle 600 sprayer. Both original spray systems were replaced with Marco systems equipped with roller pumps powered by 3 hp Briggs and Stratton engines. Spray applications were made at 4.5 mph and 40 psi using 2.5 gal total spray mixture/acre. One #4 Spraying Systems hollow cone nozzle per row was utilized. Plots were sampled 7 days after treatment by making whole plant examinations and recording fleahopper nymphs and adults in each plot. Ten 2.6 ft (l/5000th acre) samples were taken at random in each plot. Beneficial arthropods were also sampled by whole plant examination and included: Nabis spp., Chrysopa spp., Geocoris spp., Orius spp., Col lops spp. and spiders. Yield was estimated by hand-pulling all open boll’s from 50 ft of uniform cotton from each" pTot. Raintal I between treatment and sampling date at Chickasha consisted of 0.07 in Jul 27, 0.04 in Jul 30 and 0.21 in Aug 1. Altus recorded no rainfall during the test period. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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