HERBICIDAL EFFICACY OF ACETIC ACID AND CITRIC ACID BASE ON BROAD LEAF WEEDS OF MEDICINAL CROPS FIELDS

HERBICIDAL EFFICACY OF ACETIC ACID AND CITRIC ACID BASE ON BROAD LEAF WEEDS OF MEDICINAL CROPS FIELDS

Keefektifan herbisida berbasis asam asetat dan asam sitrat terhadap gulma berdaun lebar pada lahan tanaman obat

Sri Rahayuningsih and Supriadi

Indonesian Spices and Medicinal Crops Research Institute

Jalan Tentara Pelajar No. 3 Bogor 16111

Telp 0251-8321879 Faks 0251-8327010

balittro@litbang.pertanian.go.id

yayuk.balittro@litbang.pertanian.go.id

(diterima 08 Agustus 2014, direvisi 10 Oktober 2014, disetujui 27 November 2014)

ABSTRACT

The study aims to determine the effectiveness of acetic acid based formula on broad leaf weeds grown in medicinal crop fields. Two experiments were conducted, i.e. on small plots (2 m x 3 m) of a farmer’s field in Ciapus, Bogor and on a larger plot (2 m x 8 m) at the Cicurug Experimental Station, Sukabumi. The formula consisted of a mixture of acetic acid + NaCl (AG) and acetic acid + citric acid (AC), and formulas of VAC, VACG which were enriched with wood vinegar (V). As control was a commercial synthetic herbicide 2,4 D amine. The acetic acid base formulas applied at two concentrations 10 and 15%, while 2,4-diamine was followed the recommendation (0.3%) using a knapsack sprayer with a flat-fan nozzle tip. Weed vegetations were observed visually before and at 2, 4, 6, and 8 weeks after treatments. Weed severity was recorded using a 0-4 scales (0 = 0-5% mortality ; 1 = 20-50% weeds died ; 3 = 50-75% eradicated and 4 = 75-100% weed were eradicated), as well as re-growth and dry weight of the weeds. The first and second experiment showed that AC, AG, VAC and VACG applied at 10 and 15% were effective in controlling broadleaf weeds. Mechanism of action the formula is a contact poison. Its effectiveness is equivalent to 2,4-D amine treatment dose of 1.5 l ha-1. Repeated application is necessary to prolong the effect of herbicide.

Key words: Herbicide, acetic acid, citric acid, NaCl, broad leaf weeds

 

download full papper disini 

Leave a Reply

Your email address will not be published. Required fields are marked *