Abstrak. Gulma merupakan tumbuhan yang keberadaannya tidak diinginkan dan sangat merugikan bagi tanaman serta dapat menganggu kepentingan manusia dalam budidaya hasil pertanian. Penggunaan herbisida sintetis secara terus menerus telah memunculkan berbagai alternatif untuk mengendalikan gulma, seperti mengeksplor potensi senyawa kimia berasal dari dimanfaatkan sebagai bioherbisida. Alang-alang s...

to study allelopathic effects of iranian walnut (juglans regia l.) on germination and initial growth of purslane (portulaca oleracea) and redroot pigweed (amaranthus retroflexus) an experiment was conducted in shahed university. the result showed that fresh leaf had negatively effected on radicle length. also, with increasing extract concentrations of persian walnut, the seed germination and se...

ABSTRACT-The critical period of weed control is a part of crop life cycle during which weeds must be kept weed-free to avoid yield losses due to competition. In order to evaluate the effect of deficit irrigation on critical period of redroot pigweed (Amaranthus retroflexus L.) in sunflower (Helianthus annuus L.), an experiment was carried out  as split plot ba...

in order to examine of the weed damage on corn and determination of the most suitable index for corn (zea mays l.) yield reduction in field condition and multi-species weed competition, an experiment as an interval mapping was carried out in the researching field of mashhad university during 2008-2009. treatments were complete control (pre-planting treflan and hand weeding), no control (no herb...

Abstrak. Ekstrak umbi teki terbukti mengandung senyawa yang berpotensi alelopati karena mampu menghambat pertumbuhan gulma bayam duri. Pelarut merupakan faktor penting dalam proses ekstraksi senyawa. digunakan adalah metanol bersifat polar, dapat menarik polar dan nonpolar. Penelitian ini bertujuan untuk mengidentifikasi aktivitas ekstrak pada beberapa konsentrasi terhadap dilakukan di Laborato...

in recent years, machine vision and optical sensors, which can be used in an autonomous weed killing equipment, are being used extensively to detect weeds from crops. in this study, seven types of weeds that grow in most of the sugar beet fields in iran, especially in fars province, were considered in real outdoor conditions. several color feature extraction algorithms have also been investigat...