บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Bloom and postbloom applications of NAD/NAA mixture have minimal effects on yield and fruit size of field-grown tomatoes and peppers.

Stover, E. W.; Stoffella, P. J.; Garrison, S. A.; Leskovar, D. I.; Sanders, D. C.; Vavrina, C. S.;

HortScience Year: 2000 Vol: 35 Issue: 7 Pages: 1263-1264 Ref: 7 ref.

2000

บทคัดย่อ

Bloom and postbloom applications of NAD/NAA mixture have minimal effects on yield and fruit size of field-grown tomatoes and peppers.

A commercial mixture of 1-naphthaleneacetamide (NAD) and 1-napthaleneacetic acid (NAA) (Amcotone) was applied to tomato (AgriSet 761, Solar Set, and Colonial) and pepper (Capsicum annuum; Camelot, Wizard, and Hungarian Wax) cultivars grown in Fort Pierce, Florida; Immokalee, Florida; Clinton, North Carolina; Fort Pierce; Bridgeton, New Jersey; and Uvalde, Texas, USA, respectively, at various timings from early bloom to early fruit development to evaluate effects on fruit size and both early and total marketable yield. Amcotone was applied at rates from 10 to 40 mg litre-1, at three sites for each of the species studied. Measured yield response variables in tomato did not differ between the control and Amcotone treatments, regardless of location. Amcotone treatments did not affect yields or fruit size for pepper at the New Jersey or Texas sites. However, at Fort Pierce, early marketable yield of pepper increased in plots receiving three Amcotone applications at 10 mg litre-1, but total marketable

 yield was significantly reduced in all plots receiving more than two Amcotone sprays, and mean fruit weight was reduced by all Amcotone treatments. Early and total marketable yield of pepper at Fort Pierce were markedly reduced in plots receiving four applications of 40 mg litre-1, which was a high rate used to assess potential phytotoxicity. While minimal benefit from auxin application was observed in this study, earlier studies suggest that these results may have been influenced by favourable environmental conditions for fruit development or negative effects on unopened flowers during all Amcotone spray applications.