scholarly journals UJI BEBERAPA KONSENTRASI EKSTRAK BIJI PINANG (Areca catechu L.) UNTUK MENGENDALIKAN HAMA ULAT JENGKAL (Chrysodeixis chalcites Esper) PADA TANAMAN KEDELAI (Glycine max L.)

2021 ◽  
Vol 35 (2) ◽  
pp. 51-58
Author(s):  
Desita Salbiah ◽  
Rusli Rustam ◽  
Forti Senorita Daeli

Chrysodeixis chalcites Esper is the main pests in soybean plants cultivation that can cause damage up to 90%.  One of controlling was done by using areca nuts (Areca catechu L.) which has a potential as a botanical insecticide. This study aimed to obtain effective concentrations of areca nuts extract to control Chrysodeixis chalcites Esper pests on soybean plants (Glycine max L.). This research was conducted at the Laboratory of Plant Pest and Experimental Farm, Faculty of Agriculture, Riau University, Pekanbaru from August to November 2018. The study was conducted experimentally using a completely randomized design (CRD), which consisted of five treatments and four replications, namely: the concentration areca nuts extract 0 g.l-1 water, 20 g.l-1 water, 40 g.l-1 water, 60 g.l-1 water, and 80 g.l-1 water. The results showed that the concentration of 80 g.l-1 of water was an effective concentration to control Chrysodeixis chalcites pest with an initial death time of 14 hours, lethal time 50 29.25 hours after application, and total mortality of 87.50%.

2021 ◽  
Vol 35 (1) ◽  
pp. 1-6
Author(s):  
Desita Salbiah ◽  
Nelly Andria

The Lamprosema indicata Fabricius larvae is one of the main pests in soybean plantations, which cause up to 80% damage. The alternative control is the use of neem Leafs (Azadirachta indica A. Juss) which have the potential as a botanical insecticide. This research aims to find out the effective concentration of neem Leafs extract to control Lamprosema indicata F. larvae on soybean (Glycine max L. Merill). The research was conducted at the Laboratory Plant Pest and Experimental Farm in the Faculty of Agriculture, University of Riau from May to October 2018. The research was carried out by using a completely randomized design (CRD) with 6 treatments and 4 replications to obtain 24 experimental units. Treatment consist of several concentrations of neem leafs extract 0 g.l-1 water, 20 g.l-1 water, 40 g.l-1 water, 60 g.l-1 water, 80 g.l-1 water and 100 g.l-1 water. The results showed that the concentration of 80 g.l-1 water was effective to control the L. indicata larvae with an initial death time of 5.50 hours and total mortality was 87.50%.


Author(s):  
Rusli Rustam ◽  
Agus Sutikno ◽  
Jamiatul Laila

Rice is one of serealea comodity that susceptible with pest storage. One of the pest that often attack the rice in storage is Sitophilus oryzae L. The alternative for control S. oryzae L. as fumigant which enviromentally sound is Gliricidia sepium Jacq. as organic insecticide. This research aims to get the best dose G. sepium Jacq. leaf powder to control S. oryzae L. pest in rice storage. This research conducted at Laboratory of Plant Pest, Faculty of Agriculture, University of Riau, Pekan baru from Mei until Juni 2016. This research arranged experimentally by using Completely Randomized Design consisting of 5 treatments and 4 replications. The treatment consist of 5 dose levels were 0 g/100 g rice, 2 g/100 g rice, 4 g/100 g rice, 6 g/100 g rice and 8 g/100 g rice. The result showed that giving of G. sepium Jacq. leaf powder with dose 8 g/100 g rice causes time of death beginningS. oryzae L. during 31.50 hours after application, lethal time 50 during 282.8 hours after application, total mortality was 70%, amount of generation was 9,75 beetles and  decrease of seed weight’s rice was 1.08%.


2012 ◽  
Vol 4 (2) ◽  
Author(s):  
Lisa Indried Pantilu ◽  
Feky R Mantiri ◽  
Song Ai Nio ◽  
Dingse Pandiangan

Abstrak Pengembangan tanaman kedelai sebagai tanaman sela di bawah tegakan karet, hutan tanaman industri (HTI), atau tumpangsari dengan tanaman pangan semusim lain merupakan alternatif andalan untuk meningkatkan produksi kedelai. Penelitian ini bertujuan untuk mengamati respons morfologi dan anatomi kecambah kacang kedelai pada stadium vegetatif 3 terhadap perbedaan intensitas cahaya. Penelitian ini dilakukan dengan menggunakan Rancangan Acak Lengkap (RAL) dengan satu faktor tunggal yaitu  intensitas cahaya, dengan tiga taraf perlakuan yaitu P0 (tanpa naungan), P1 (naungan paranet 1 lapis untuk naungan ±50%) dan P2 (naungan paranet 2 lapis untuk naungan ±90%) dalam tiga kali ulangan. Penelitian ini menggunakan satu varietas kacang kedelai. Morfologi tanaman kedelai pada stadium vegetatif 3 dipengaruhi oleh intensitas cahaya. Hasil uji ANOVA yang dilanjutkan dengan BNT (5%) menunjukkan  tinggi tanaman  pada P2 dua kali lebih besar dibandingkan dengan tinggi tanaman pada P0; jumlah daun tidak berbeda antara perlakuan P0 dengan P1 dan antara P1 dan P2, tetapi jumlah daun pada P2 lebih banyak dibandingkan dengan jumlah daun pada P0 dan luas daun pada P0 lebih besar dibandingkan dengan luas daun P1 dan P2. Anatomi tanaman kedelai (jumlah, panjang, dan diameter stomata) pada stadium vegetatif 3 tidak dipengaruhi oleh intensitas cahaya. Kata kunci: anatomi, cahaya, kedelai, morfologi, naungan   Abstract Development of soybean plants as a plant stand waiting at the bottom of the rubber, plantation forests (HTI), or intercropped with other annual scropsis an alternative pledge to increase soybean production. This study aimed to observe the morphological and anatomical responses of soybean sprouts at the vegetative stage 3 of the difference in light intensity. The research was conducted using Completely Randomized Design(CRD) with one single factor is the influence of light, with a three-stage treatment of P0(without shade), P1(1 layer paranet shade to shade ± 50%) and P2(2 layers for shading paranet auspices of± 90%) in three replications.This study uses one variety of soybeans. Morphology of soybean plants at the vegetative stage 3 is influenced by light intensity. ANOVA test followed by LSD(5%) plant height at P2 showed two times greater than the height of plants at P0; number of leaves did not differ between treatments P0 with P1 and between P1 and P2, but the number of leaves on P2 more than with the number of leaves on leaf area at P0 and P0 is greater leaf area compared with P1 and P2. Anatomy of soybean plants (number, length and diameter of the stomata) in the vegetative stage 3 is not affected by light intensity. Keywords: anatomy, light, morphology, shade, soybean    


2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Abd. Hamid ◽  
Riza Linda ◽  
Mukarlina Mukarlina

Soybean (Glycine max [L.] Merrill) Anjasmoro variety is one of the superior soybean varieties widely cultivated in West Kalimantan. The growth of soybean can be increased by applying liquid organic fertilizer namely goat biourine. The purpose of this study was to determine the goat biourine quality and the effect of the application of goat biourine on the growth of Anjasmoro variety soybean plants. This study uses a Completely Randomized Design (CRD) consisting of five treatments, namely without biourine/control, 100 mL/L biourine, 200 mL/L biourine, 300 biourine mL/L and  400 mL/L biourine. Each treatment was repeated 5 times to obtain 25 experimental units. The analysis of goat biourine showed the value of C-Organic 2.03%, pH 4.83, N 0.72%, P 0.004% and K 0.234%. The results showed that apply of goat biourine had a significant effect on plant height, number of leaves, shoot wet of weight, shoot dry of weight, number of branches, number of root nodules and the number of effective root nodules, but it had not a significant effect on root wet of weight and root dry of weight.


2021 ◽  
Vol 4 (2) ◽  
pp. 79-89
Author(s):  
Divasyah Luthfi Nasution ◽  
Rusli Rustam

Beet armyworm (Spodoptera exigua Hubner) is one of the main problems in shallot cultivation which can cause production losses of up to 100% if not controlled. The use of botanical pesticides from jengkol rind extract (Pithecellobium lobatum Benth) is a solution to control beet armyworms (Spodoptera exigua Hubner). This study aims to obtain a concentration of jengkol rind extract which is effective to controlling beet armyworm. The study was conducted at the Laboratory of Plant Pest and Experimental Garden at the Faculty of Agriculture, University of Riau from January until March 2020. This research was conducted experimentally using a completely randomized design (CRD) with five treatments and four replications. The treatments given were jengkol rind extract concentration   0 g.l-1 water, 25 g.l-1 water, 50 g.l-1 water, 75 g.l-1 water and 100 g.l-1 water. The results indicate that the application of jengkol rind extract 100 gl-1 water is an effective concentration to control beet armyworm with an initial time of death 12.75 hours, a lethal time 50 at 37.50 hours, the highest daily mortality on the second day at 37.5% and total mortality is 92.5% in the 5 days after application.


2015 ◽  
Vol 4 (1) ◽  
pp. 8-13
Author(s):  
Priscillia Picauly ◽  
Josefina Talahatu ◽  
Meitycorfrida Mailoa

Soybean (Glycine max (L) Merr) is needed as an alternative diversification in order to increase protein consumption. Soybean can be processed into variety of foods and drinks. The most popular drink from soybean is soya milk which is made from soybean extract yielded from the addition of water. The amount of water added determine the quality of soya milk due to its effect on the chemical and physical properties of soya milk. This research was intended to find out the proper ratio of soybean and water in the processing of soya milk to yield the best quality. A completely randomized design was used with eight treatments of soybean and water ratio as follows, ratio of 1 : 6, ratio of 1 : 8, ratio of 1 : 10, ratio of 1 : 12, ratio of 1 : 14, ratio of 1 : 16, ratio of 1 : 18 and ratio of 1 : 20. Result showed the soybean and water ratio 1 : 10 in the processing of soya milk yielded milk having good quality according to its chemical with protein content of 2.53%, fat of 1.20%, sugar total of 1.60%, pH of 7.1, and organoleptic characteristies of both somewhat sweet taste and viscous texture.


2021 ◽  
Vol 219 ◽  
pp. 112312
Author(s):  
Yinlong Xiao ◽  
Ying Du ◽  
Yue Xiao ◽  
Xiaohong Zhang ◽  
Jun Wu ◽  
...  

2021 ◽  
Vol 22 (2) ◽  
pp. 920
Author(s):  
Ling Cheng ◽  
Wanling Min ◽  
Man Li ◽  
Lili Zhou ◽  
Chuan-Chih Hsu ◽  
...  

Soybean (Glycine max L.) is a major crop providing important source for protein and oil for human life. Low phosphate (LP) availability is a critical limiting factor affecting soybean production. Soybean plants develop a series of strategies to adapt to phosphate (Pi) limitation condition. However, the underlying molecular mechanisms responsible for LP stress response remain largely unknown. Here, we performed a label-free quantification (LFQ) analysis of soybean leaves grown under low and high phosphate conditions. We identified 267 induced and 440 reduced differential proteins from phosphate-starved leaves. Almost a quarter of the LP decreased proteins are involved in translation processes, while the LP increased proteins are accumulated in chlorophyll biosynthetic and carbon metabolic processes. Among these induced proteins, an enolase protein, GmENO2a was found to be mostly induced protein. On the transcriptional level, GmENO2a and GmENO2b, but not GmENO2c or GmENO2d, were dramatically induced by phosphate starvation. Among 14 enolase genes, only GmENO2a and GmENO2b genes contain the P1BS motif in their promoter regions. Furthermore, GmENO2b was specifically induced in the GmPHR31 overexpressing soybean plants. Our findings provide molecular insights into how soybean plants tune basic carbon metabolic pathway to adapt to Pi deprivation through the ENO2 enzymes.


2014 ◽  
Vol 7 (2) ◽  
pp. 75-80 ◽  
Author(s):  
Bruno Henrique Sardinha de Souza ◽  
Eduardo Neves Costa ◽  
Anderson Gonçalves da Silva ◽  
Arlindo Leal Boiça Júnior

A soja, Glycine max (L.) Merril, é uma das culturas de maior importância econômica para o Brasil, considerada uma commodity nacional devido à sua alta produtividade e participação nas exportações no mercado internacional. Dentre os insetos-pragas que causam danos para essa cultura, nos últimos anos agrícolas têm merecido destaque as lagartas de Spodoptera eridania (Cramer), as quais podem se alimentar tanto de folhas quanto das vagens das plantas de soja, causando prejuízos econômicos para os sojicultores, principalmente nas áreas do Cerrado localizadas na região Centro-Oeste do país. O objetivo da presente revisão é disponibilizar informações sobre os aspectos bionômicos de S. eridania, a fim de dar subsídios para futuras pesquisas sobre o manejo dessa praga.Bionomic Aspects of Spodoptera eridania (Cramer): A Pest in Expansion on Soybean Crop in the Region of Brazilian CerradoAbstract. Soybean, Glycine max (L.) Merril, represents one of the major economically important crops to Brazil, and is considered a national commodity because of its high yield and participation in international trade exportations. Among the insect pests that cause damage to this crop, Spodoptera eridania (Cramer) larvae highlighted in the last agricultural seasons by feeding on leaves and pods of soybean plants, and hence causing economical losses to soybean growers, especially in the Cerrado areas located in the Midwest region of the country. We aimed with this review to provide information about bionomical aspects of S. eridania in order to give subsides for further researches on the management of this pest.


1998 ◽  
Vol 27 (4) ◽  
pp. 513-518 ◽  
Author(s):  
Mauro T. B. Silva ◽  
Nelson Neto ◽  
Clara B. Hoffmann-Campo

Soybean [(Glycine max (L.) Merrill] commercial fields, maintained under a no-till system, were sampled during the crop seasons 1990/91 and 1996/97, in Cruz Alta and Júlio de Castilhos, Rio Grande do Sul State, to determine the distribution of eggs, larvae and adults of Sternechus subsignatus Boheman (Coleoptera : Curculionidae). Soybean plants and soil were examined at different time schedules. Eggs and larvae were recorded in main stems, lateral branches and leaf petioles, divided into the upper third, medium and lower third of soybean plants. Eggs (87%), and larvae (79%) were mainly observed in the main stem and in the medium plant sections (87% and 78%, respectively). Larval movement was not observed because larvae remained inside the galls, in the same area where the eggs were laid. Adults were located in different places depending on the sampling time. At night, adults were observed to move to the upper third of the plant and, during the day, down to the lower third of the plant and to the soil. The insects are normally concealed during their pre- and post- embryonic stage throughout most of the day.


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