[ALLELOCHEMICAL POTENTIAL OF AQUEOUS EXTRACT AND MULCH OF PLANT BIOMASS OF SORGHUM (Sorgum bicolor L. Moench)]. This study was aimed to examine the allelopathic potential of sorghum through aqueous extract and mulch from biomass on seed germination and early growth of three tested plants, namely rice, mustard and cucumber. The results showed that the aqueous extract of the sorghum biomass significantly inhibited the germination of mustard and cucumber seeds, reduced the vigor-index of the germination of rice, mustard and cucumber seeds, and suppressed the growth of radicle length of mustard sprouts. The same thing was seen when sorghum biomass was tested as mulch which also suppressed the early growth of the tested plants on the variables of stem height, fresh and dry weight of biomass of rice, mustard and cucumber. The higher the concentration of allelochemicals extract or sorghum mulch, the stronger the inhibition on germination and early growth of the three test plants. At a concentration of 10% allelochemicals suppressed the germination of mustard and cucumber to 76 and 79%, respectively, while a dose of 10% mulch suppressed early growth in the height of rice, mustard, and cucumber to 56, 55, and 68%; and dry weight to 53, 30 and 60%. The results of this study are important information about the allelochemical potential of sorghum as a natural herbicide in integrated weed management

Tanaman jagung (Zea mays L) merupakan tanaman pangan penghasil karbohidrat potensial kedua di Indonesia setelah beras. Provinsi Bengkulu merupakan provinsi yang sebagian besar wilayahnya merupakan kawasan hutan lindung dan hutan rakyat. Perkebunan jagung mengalami gangguan, antara lain disebabkan oleh gulma. Gulma merupakan tumbuhan liar yang sering muncul di pekarangan rumah dan pertanian masyarakat. Penelitian ini hanya diambil empat jenis gulma yang sering muncul di perkebunan jagung yaitu Ageratum sp, Commelina sp, Eleusine sp, dan Sacciolepis sp. Penelitian ini dibangun sebuah model identifikasi genus gulma dengan memanfaatkan algoritma Single Shot Detector (SSD). Single Shot Detector merupakan sebuah model yang dapat mendeteksi atau mengenali objek pada suatu gambar. Penelitian ini menggunakan 800 dataset training untuk melatih sistem Deep Learning dan 150 Dataset testing untuk validasi dan evaluasi terhadap model yang dihasilkan. Dengan nilai threshold IoU dan minimum confidence @0.80 tingkat akurasi yang didapatkan pada penelitian ini sebesar 62.44%.Tanaman jagung (Zea mays L) merupakan tanaman pangan penghasil karbohidrat potensial kedua di Indonesia setelah beras. Provinsi Bengkulu merupakan provinsi yang sebagian besar wilayahnya merupakan kawasan hutan lindung dan hutan rakyat. Perkebunan jagung mengalami gangguan, antara lain disebabkan oleh gulma. Gulma merupakan tumbuhan liar yang sering muncul di pekarangan rumah dan pertanian masyarakat. Penelitian ini hanya diambil empat jenis gulma yang sering muncul di perkebunan jagung yaitu Ageratum sp, Commelina sp, Eleusine sp, dan Sacciolepis sp. Penelitian ini dibangun sebuah model identifikasi genus gulma dengan memanfaatkan algoritma Single Shot Detector (SSD). Single Shot Detector merupakan sebuah model yang dapat mendeteksi atau mengenali objek pada suatu gambar. Penelitian ini menggunakan 800 dataset training untuk melatih sistem Deep Learning dan 150 Dataset testing untuk validasi dan evaluasi terhadap model yang dihasilkan. Dengan nilai threshold IoU dan minimum confidence @0.80 tingkat akurasi yang didapatkan pada penelitian ini sebesar 62.44%.

Weed is the main problem in organic agriculture. Intercropping is an agricultural practice to control weeds. The study intended to compare weed growth and sweet corn yield in intercropping and monoculture patterns with different mulch types and to determine the best planting pattern and mulch type for crop growth and yield. A field experiment was conducted at the CAPS Research Station situated in Air Duku Village, Rejang Lebong, Bengkulu, at 1054 m above sea level. The experiment used Completely Randomized Block Design (RCBD) with two factors. There were no interactions between planting patterns and organic mulch types on weed growth and sweet corn yield. Intercropping sweet corn-kidney bean and sweet corn-string bean suppressed the growth of weeds. Also, intercropping of sweet corn-kidney bean or sweet corn-string bean had similar sweet corn yield with monoculture. Rice straw and rice husk mulch suppressed weeds growth better than coffee husk mulch.

Various results of researches report that daisy Creeping Daisy (Wedelia trilobata),Goat weed (Ageratum conyzoides), Siam weed (Chromolaena odorata) and Bittervine

Status: PostprintAbstract— Weeds are the major problem in organic crop production. Soil solarization is a method using clear plastic films to increase soil temperature to control pest organisms such as fungi, bacteria, and weed seeds. The study aimed to evaluate the effect of different plastic mulch color on weed seed inhibition. The experiment was carried out in CAPS Research Station located in Air Duku Village, Bengkulu, Indonesia at 1054 m above sea level, arranged in Randomized Completely Block Design with 3 replications. Treatments comprised 4 different colors of plastic films, i.e silver-black, black, clear, and red as well as control (without mulch). Plastic mulch was laid on 1 m wide x 2 m long raised soil bed for four weeks from April 20–May 23, 2016. Soil temperature underneath plastic mulch at depth of 5, 10, 15, 20 cm from the surface were measured daily at noon. After incubation, soil sample was collected from 0-5; 5-10; 10-15; 15-20 cm depths. Weed seed germination of each soil sample was tested in the greenhouse. A number of weeds were observed after four weeks. The experiment indicated that a month of soil solarization using clear plastic mulch resulted in greatest soil temperature, increasing by 0.54-1.84% as compared to control. Treatment of plastic mulches was effective to suppress seed inhibition at the soil depth of 0-15 cm, as indicated by numbers of germinated weed and its dry matter. Longer soil solarization is necessary to obtain the highest reduction of weed growth in tropical highland organic farming system.