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Title: Non-pungent jalapeno pepper yields and preplant incorporated herbicides

Author
item Webber Iii, Charles
item Russo, Vincent
item SHREFLER, JAMES - OSU, LANE, OK

Submitted to: American Society of Horticulture Science Meeting
Publication Type: Abstract Only
Publication Acceptance Date: 4/1/2006
Publication Date: 7/1/2006
Citation: Webber III, C.L., Russo, V.M., Shrefler, J.W. 2006. Non-pungent jalapeno pepper yields and preplant incorporated herbicides [abstract]. HortScience. 41(4):1074.

Interpretive Summary:

Technical Abstract: Non-pungent jalapeno peppers are used for making commercial picante sauces (salsas) and have a potential for outstanding yields in Oklahoma. There is incomplete information on the crop safety of certain herbicides that may not specifically address their use with non-pungent jalapeno peppers. The objective of this research was to determine the weed control efficacy and safety of a combination of preplant incorporated herbicides on transplanted non-pungent jalapeno pepper production. A field study was conducted during the summer of 2005 on 91-cm wide raised beds at Lane, OK. The herbicides in the study included napropramide (2.2 kg ai/ha), clomazone (1.1 kg ai/ha), bensulide (6.7 kg ai/ha), and trifluralin (1.1 kg ai/ha) used separately, and in combination with one of the other herbicides. All herbicides were applied preplant incorporated just prior to transplanting on 6 May 2005. Pace 105 non-pungent jalapeno peppers were transplanted on 6 May 2005 with a 46-cm spacing between plants within the rows. Fruit were harvested on 21 July 2005, 76 days after transplanting. Plants treated with clomazone used by itself produced the greatest yields (16.4 mt/ha) compared to plants treated with the other herbicides used individually, although it was not significantly greater than napropramide, 9.2 mt/ha. Four of the five top yielding herbicide treatments included the use of clomazone. The tank mixture of napropramide and bensulide produced the second greatest yield (16.2 mt/ha). The weed-free treatment produced 17.5 mt/ha compared to 86% yield reduction for the weedy check. These results demonstrated that clomazone used individually, or in combination with certain other herbicides, can maintain non-pungent jalapeno yields equivalent to weed-free levels.