Broadleaf weed control in peppers with herbicides applied pre-transplant
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Keywords

Peppers--Weed control--Puerto Rico
Herbicides--Puerto Rico

How to Cite

Semidey, N., Caraballo, E., & Acín, N. (1989). Broadleaf weed control in peppers with herbicides applied pre-transplant. The Journal of Agriculture of the University of Puerto Rico, 73(1), 67-73. https://doi.org/10.46429/jaupr.v73i1.6375

Abstract

Two herbicide field experiments were conducted with transplanted pepper at Juana Díaz and Lajas Agricultural Experiment Substations. The first experiment was performed with cv. Blanco del País, from December 1, 1987 to March 23, 1988, at Juana Díaz. Pre-transplant treatments with oxyfluorfen (0.14 kg ai/ha), alone and combined with metolachlor (2.24 kg ai/ha), cinmethyiin (1.47 ka ai/ha), pendimethalin (1.65 kg ai/ha), paraquat (0.56 kg ai/ha) and fluazifop-P (0.25 kg ai/ha), gave excellent control of broadleaf weeds during the first 3 weeks. Highest phytotoxicity (19%) was recorded at 6 weeks with the oxyfluorfen plus conmethylin treatment. Oxyfluorfen (0.14 kg ai/ha), plus handweeding at 6 weeks, gave the highest pepper yield (31,200 kg/ha). Other herbicide treatments provided significantly (P = 0.05) lower yields. The second experiment was conducted at the Lajas Substation with cv. Cubonelle, from January 21, 1988 to May 2, 1988. Paraquat (0.56 kg ai/ha) pre-transplant treatments in mixture (separately) with oxyfluorfen (0.14 kg ai/ha), fluaztfop-P (0.25 kg ai/ha) and trifluralin (1.12 kg ai/ha) gave excellent control of broadleaf weeds during the first 3 weeks. Oxyfluorfen treatments gave generally poor control of broadleaf weeds at Lajas. The highest pepper yield (20,945 kg/ha) at Lajas was obtained from the control treatment (pre-transplant rotavation plus two handweedings).

https://doi.org/10.46429/jaupr.v73i1.6375
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