Effect of cadmium chloride on soybean in presence ofarbuscular mycorrhiza and vermicompost

2016 ◽  
Author(s):  
Alireza Yadavi ◽  
Parvin Pireh ◽  
Hamidreza Balouchi
Keyword(s):  
Arbuscular Mycorrhiza ◽  
Photosynthetic Rate ◽  
Cadmium Chloride ◽  
Cadmium Toxicity ◽  
Grain Weight ◽  
Root Weight ◽  
Leaf Transpiration ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Pod Number

A greenhouse experiment was conducted to study the combined effects of cadmium toxicity, application of vermicompost and inoculation of arbuscular mycorrhiza on soybean. The experiment was laid out in a completely randomized design (factorial) and replicated thrice. The treatments included arbuscular mycorrhiza in two levels (inoculation and non- inoculation in soil), vermicompost in two levels (application @ 5 % of soil weight and non-application) and cadmium chloride in five levels (0, 20, 40, 80 and 160 mg kg-1 of soil). The result showed that increasing concentrations of cadmium chloride significantly increased electrolyte leakage and leaf transpiration, and decreased photosynthetic rate, Fv/Fm, root weight, pod number per plant and grain weight per plant. Application of vermicompost and mycorrhiza decreased the toxic effects of cadmium chloride. Application of vermicompost increased Fv/Fm, grain weight per plant, number pods per plant and seed oil percent, and application of mycorrhiza increased root weight and photosynthetic rate.

scholarly journals Morphological and Agronomic Characteristics of Common Beans Subjected to Seed Priming With Different Doses of N6-benzyladenine

2019 ◽  
Vol 11 (7) ◽  
pp. 178
Author(s):  
Ricardo A. Silva ◽  
Sylvana N. Matsumoto ◽  
Ramon C. Vasconcelos ◽  
Franklin D. Carvalho ◽  
Luan S. Oiveira ◽  
...  
Keyword(s):  
Common Bean ◽  
Seed Priming ◽  
Leaf Nitrogen ◽  
Agricultural Practice ◽  
Common Beans ◽  
Randomized Design ◽  
Bean Yield ◽  
Completely Randomized Design ◽  
Pod Number ◽  
Different Doses

In field conditions, the more usual application of cytokinins is based mainly on seed treatment and foliar spraying. Nowadays, seed priming with plant growth regulators is a successful agricultural practice due to its easy application in annual crops, resulting in a higher vigor and production. In order to evaluate the effect of the treatment of common bean seeds with N6-benzyladenine (6-BA), in the morphophysiology and crop yield, an experiment was carried out in a greenhouse, in a completely randomized design with four replicates and five doses of 6-BA (0, 0.0375, 0.075, 0.1125 and 0.15 g kg-1 of seed). The growth regulator was applied to the seeds in order to cover their entire surface. At 30 days after emergence, the physiological parameters were increased as a function of the doses of 6-BA. On the other hand, at 30 and 45 days after emergence of the crop, there was a drastic reduction in nodulation with increased 6-BA doses, which resulted in the lower accumulation of leaf nitrogen, pod number, and common bean yield. The ranging doses till 0.15 g kg-1 of seed of the cytokinin 6-BA are not recommended in seed priming of common beans. However, the effective recommendation of cytokinin as a seed priming is still not determined, and studies about products and doses must be improved before recommendation.

scholarly journals PENGARUH KONSENTRASI DAN LAMA PERENDAMAN A. pintoi DENGAN URIN TERNAK SAPI TERHADAP PERTUMBUHAN TANAMAN A. pintoi

ZOOTEC ◽  
2016 ◽  
Vol 37 (1) ◽  
pp. 15
Author(s):  
Novalia Lumban Gaol ◽  
Ch. L. Kaunang ◽  
Rustandi . ◽  
F. Dompas
Keyword(s):  
Urine Concentration ◽  
Plant Roots ◽  
Root Weight ◽  
Factor B ◽  
Soaking Time ◽  
Arachis Pintoi ◽  
Randomized Design ◽  
Cow Urine ◽  
Completely Randomized Design ◽  
Plant Length

INFLUENCE OF CONCENTRATION AND SOAKING TIME OF A. pintoi IN THE COW URINE ON PLANT GROWTH. Cow urine has an auksin a, auksin b, and IAA (hetero auksin) that can stimulate plant roots. The present study was conducted to determine the influence of concentration and soaking time in the cow urine on Arachis pintoi (A. pinto) growth. This study used Completely Randomized Design (CRD) in Factorial arrangement with 2 factors A and B. Factor A= urine concentration: A1 = urine 75% + water 25% and A2; urine 50% + water 50%; and factor B = soaking time: B1 = 1 hour; B2 = 2 hours; Dan, B3 = 3 hours. Treatments were replicated 4 times. Parameters measured were: leaves amount (sheets), plant length (cm), and root weight (g). Research results showed that mean leaves amount ranged from 41,65 to 46,77 sheets, plant length 35,97-36,67 cm, and root weight 1,95-1,72 g. Utilization of cow urine with a different concentration and soaking time gave a non significant different (P>0.05) on leaves amount, plant length, and root weight. It can be concluded that cow urine concentration and soaking time do not effect leaves amount, plant length, and root weight of Arachis pintoi (A. pinto). Key words:  Cow urine concentration, Soaking time,  A. pintoi.

scholarly journals Response of Rice (Oryza sativa) to the Application of Manganese in Makurdi, Benue State, Nigeria

2018 ◽  
Vol 4 ◽  
pp. 17-24
Author(s):  
Friday Ibrahim ◽  
S.I. Anebi ◽  
P. Michael Alogakho
Keyword(s):  
Growth Parameters ◽  
Growth And Yield ◽  
Root Weight ◽  
Yield Parameters ◽  
Randomized Design ◽  
Significant Difference ◽  
Completely Randomized Design ◽  
The University ◽  
Dry Matter Weight ◽  
Yield Decrease

A pot experiment was carried out at the Agronomy Teaching and Research Farm of the University of Agriculture Makurdi to determine the effect of manganese fertilizer on the growth and yield of rice. Treatment consists of five levels of Manganese (Mn) (0, 5, 10, 15 and 20 kg ha-1) in form of MnSO4. The treatments were laid out in a Completely Randomized Design (CRD) with three replications. The effect of Mn on the growth of rice indicate that there were no significant difference in the growth parameters measured with the exception of plant height at 8 weeks after planting and number of tillers at 4 weeks after planting. The tallest plants and highest number of tillers were obtained with 10 kg ha-1 Mn. The effect of Mn on the yield of rice indicate that there was a significant difference in the yield parameters measured with the exception of number of grain per panicle and root weight at 4 weeks after planting. Manganese at the rate of 10 kg ha-1 gave the highest grain yield (2,667 kg ha-1) and highest dry matter weight. Levels of Mn above 10 kg ha-1 led to yield decrease, therefore application of 10 kg ha-1 Mn was recommended for optimum yield of rice.

scholarly journals PENGARUH PEMBERIAN KOMPOS AMPAS TEBU DAN NPK 16:16:16 TERHADAP PERTUMBUHAN SERTA PRODUKSI BUNCIS (Phaseolus vulgaris L.)

2020 ◽  
Vol 34 (3) ◽  
pp. 265-274
Author(s):  
Rian Juniarto ◽  
Maizar ◽  
Raisa Baharuddin
Keyword(s):  
Stem Length ◽  
Phaseolus Vulgaris L ◽  
Green Beans ◽  
Randomized Design ◽  
Treatment Dose ◽  
Main Effect ◽  
Completely Randomized Design ◽  
Pod Length ◽  
Pod Number

ABSTRACT The purpose of this study was to determine the effect of the interaction of bagasse compost and NPK 16:16:16 on the growth and production of green beans. This research uses a factorial completely randomized design (RAL) consisting of 2 factors. The first factor of bagasse compost (A) consists of 4 levels, namely: 0, 600, 1200, 1800 g / plot. The second factor NPK 16:16:16 (N) consists of 4 levels, namely: 0, 16, 24, 32 g / plot. Each treatment consisted of 3 replications so that the total was 48 experimental units. The parameters observed were stem length, flowering age, harvest age, number of pods per plant, pod weight per plant, pod weight per plot, pod length per pod, number of remaining pods. Data were analyzed statistically and continued with a BNJ follow-up test of a 5% level. The results showed that the interaction of bagasse compost and NPK 16:16:16 significantly affected pod weight per plant, pod weight per plot, number of pods per plant, pod length per pod, and number of remaining pods. The best treatment of bagasse compost at a dose of 1200 g / plot and NPK 16:16:16 24 g / plot (A2N2). The main effect of the bagasse compost was evident in all observational parameters. The best treatment is 1200 g / plot (A2). The main effect of the 16:16:16 NPK dose is evident in all observational parameters. The best treatment dose is 24 g / per plot (N2). Keywords:  Bagasse compost, NPK, Green Beans

scholarly journals Damage quantification and reaction of bean genotypes (Phaseolus vulgaris L.) to Meloidogyne incognita race 3 and M. javanica

2012 ◽  
Vol 38 (1) ◽  
pp. 24-29 ◽  
Author(s):  
Leonardo Nazário Silva dos Santos ◽  
Fábio Ramos Alves ◽  
Leônidas Leoni Belan ◽  
Pablo Diego Silva Cabral ◽  
Frederico de Pina Matta ◽  
...  
Keyword(s):  
Root Nodules ◽  
Root Weight ◽  
Fresh Matter ◽  
Damage Quantification ◽  
Final Population ◽  
Randomized Design ◽  
Bean Plants ◽  
Completely Randomized Design ◽  
Moderately Resistant ◽  
Dry Matter Weight

The damage and the resistance levels of cultivars and accessions of common beans rescued in the South and mountain regions of Espírito Santo State, Brazil, to M. incognita race 3 and M. javanica parasitism were evaluated under a greenhouse. Four rescued bean genotypes ("FORT-10", "FORT-13", "FORT-16" and "FORT-19") and 2 commercial cultivars: "Pérola", and "Aporé", were tested. The cultivar "Rico-23" was included as standard of susceptibility to nematodes and non-inoculated plants constituted the control. Thus, the experiment was carried out in a completely randomized design in 3 (treatments considering nematodes) x 7 (genotypes and bean cultivars) factorial arrangement, with 7 replicates. Data were measured at 50 days after plant inoculation. For damage quantification, the following variables were evaluated: plant height (PHE), number of nodes (NNO), number of trifoliate leaves (NRT), fresh matter weight (FWE) and dry matter weight (DWE) of shoots, root weight (RWE), number of root nodules (NRO) and final population (FPO) of nematodes per root system. There were no significant differences between the effects caused by M. incognita and M. javanica, but both species showed inferior values of PHE, NNO, NRT, RWE, FWE and DWE compared to controls. Concerning the levels of resistance of bean plants to M. incognita, the genotypes "FORT-10", "FORT-13", "Aporé" and "FORT-16" behaved as moderately resistant, the cultivars "Rico 23" and "Pérola" low resistant, and the genotype "FORT-19" as highly susceptible. When parasitized by M. javanica, the beans "FORT-19", "Rico-23", "FORT-16" and "FORT-13" were low resistant, "Pérola" and "Aporé" susceptible and "FORT-10" highly susceptible.

scholarly journals PENAMPILAN AGRONOMI BERBAGAI AKSESI KATUK {Sauropus androgynus (L.) Merr.} PADA DOSIS PUPUK UREA BERBEDA

2021 ◽  
Vol 6 (2) ◽  
Author(s):  
Ulfa Khaerunnisa ◽  
Arifah Rahayu ◽  
Yanyan Mulyaningsih
Keyword(s):  
Plant Height ◽  
Dry Weight ◽  
Root Weight ◽  
Fresh Weight ◽  
Urea Fertilizer ◽  
Randomized Design ◽  
Weight Yield ◽  
Two Factors ◽  
Wet Weight ◽  
Completely Randomized Design

Katuk {Sauropus androgynus (L.) Merr} is a leafy vegetable which requires nitrogen for itsvegetative growth.  This study was aimed at assessing the agronomic performance of various accessions of katuk vegetable grown with different rates of urea fertilizer administration.  A completely randomized design with two factors was used.  The first factor was katuk accessions consisting of Sukaraja Sukabumi, Cugenang Cianjur, and Kemang Bogor.  The second factor was urea fertilizer administration in five rates, namely 0, 33.3, 66.7, 100%, and 133.3% of recommended rate (R).  Results showed that katuk plant of Sukabumi accession gave the best plant height and leaflet area.  Katuk plant of Cianjur accession had the highest values of plant height, number of buds, yield fresh weight, yield dry weight, and root length.  Katuk plant of Bogor accession was found to have the highest fresh root weight.  Urea administration of 66.7-133.3% R resulted in katuk plant with the best values of plant height, number of buds, stem diameter.  The widest leaf area was found in 100% R urea administration and the highest root weight was found in plants treated with 66.7% R urea administration.  The increase of urea fertilizer doses starting from 33.3% R in Cianjur and Bogor katuk accession increased the total harvest wet weight and dry weight, while in Sukabumi accession the significant increase in production was at a dose of 100% R and 133.3% R urea. The increase in vitamin C content was significant in the application of 133.3% R urea fertilizer.

scholarly journals CARACTERÍSTICAS FISIOLÓGICAS E DE DESENVOLVIMENTO DE Cyperus difformis L. RESISTENTE E SUSCETÍVEL AO HERBICIDA PYRAZOSULFURON-ETHYL

2011 ◽  
Vol 12 (3) ◽  
Author(s):  
Taísa DAL MAGRO ◽  
Dirceu AGOSTINETTO ◽  
Antônio Alberto da SILVA ◽  
Leandro VARGAS ◽  
Luís Eduardo PANOZZO ◽  
...  
Keyword(s):  
Leaf Area ◽  
Water Use ◽  
Photosynthetic Rate ◽  
Transpiration Rate ◽  
Dry Mass ◽  
Mass Rate ◽  
Green House ◽  
Cyperus Difformis ◽  
Randomized Design ◽  
Completely Randomized Design

Os biótipos de plantas daninhas resistentes a herbicidas podem apresentar diferenças fisiológicas e de desenvolvimento quando comparado a biótipos suscetíveis. O objetivo deste trabalho foi comparar características fisiológicas e de desenvolvimento de biótipos Cyperus difformis resistente e suscetível ao herbicida pyrazosulfuron-ethyl. Foram conduzidos dois experimentos em casa de vegetação, um na Universidade Federal de Pelotas (Exp. I) e outro na Universidade Federal de Viçosa (Exp. II), em delineamento experimental completamente casualizado, com quatro repetições. No primeiro experimento (Exp. I) os tratamentos constaram de biótipos de C. difformis resistente (CYPDI 9) e suscetível (CYPDI 8) ao herbicida pyrazosulfuron-ethyl e de seis épocas de coletas (14, 28, 42, 56, 70 e 84 dias após a emergência) e no segundo (Exp. II) os biótipos de C. difformis resistente e suscetível foram avaliados com e sem a aplicação do herbicida pyrazosulfuronethyl, na dose de 20g ha-1. As variáveis avaliadas no Exp. I foram área foliar (AF), massa da parte aérea seca (MPAS), taxa de crescimento absoluto e a relação AF e MPAS; no Exp. II, CO2 consumido, taxa de fluxo de gases, concentração de CO2 subestomático, taxa transpiratória, condutância estomática de vapores de água, taxa fotossintética e eficiência do uso da água. Observou-se que os biótipos de C. difformis resistente e suscetível ao herbicida pyrazosulfuron-ethyl apresentam características fisiológicas e de desenvolvimento semelhantes. ABSTRACT The resistance of weed to herbicides can cause alterations in physiologic characteristics and development of the resistant biotype. The objectives of this work went to compare physiologic characteristics and development from biotypes of resistant and susceptible C. difformis to ALS inhibiting herbicides. For that, two Studies were driven at green house of UFPel (Study I) and of UFV (Study II) in completely randomized design, with four replicates. In Study I the treatments consisted of resistant biotype (CYPDI 9) and susceptible (CYPDI 8) of C. difformis to herbicide pyrazosulfuron-ethyl and six times of collections (14, 28, 42, 56, 70 and 84 days after the emergency) and in Study II the same biotypes (resistant and susceptible) added of the application of pyrazosulfuron-ethyl in the rate of 20g ha-1. The variable availed were leaf area, aerial dry mass, rate growth and the relation leaf area and aerial dry mass, in Study I and consumed CO2, rate of flow of gases for the stomata, concentration of CO2 sub-stomatal, transpiration rate, stomatic conductance of steams of water, photosynthetic rate and efficiency of the water use in Study II. Before the results, it can be observed that the resistant and susceptible biotypes of C. difformis to pyrazosulfuron-ethyl herbicide, present physiologic characteristics and development similar.

Performans Rumput Setaria (Setaria spahcelata) yang Diberi Mikoriza Arbuskula dengan Level Berbeda

2017 ◽  
Vol 2 (4) ◽  
Author(s):  
Cut Purnama ◽  
Mira Delima ◽  
Asril Asril
Keyword(s):  
Plant Height ◽  
Animal Husbandry ◽  
Arbuscular Mycorrhizal ◽  
Leaf Width ◽  
Root Weight ◽  
Randomized Design ◽  
Nutritional Science ◽  
Setaria Sphacelata ◽  
Completely Randomized Design ◽  
Fresh Root

Abstrak.  Suatu penelitian tentang efektivitas mikoriza arbuskula terhadap performans rumput  setaria (Setaria sphacelata) telah dilakukan di Laboratorium Lapangan Peternakan (LLP) yang terletak di Jalan Utama Gampong Rukoh dan Laboratorium Ilmu Nutrisi dan Teknologi Pakan Prodi Peternakan, Fakultas Pertanian, Universitas Syiah Kuala mulai dari bulan Februari 2017 hingga April 2017. Penelitian bertujuan untuk mengetahui performans rumput setaria yang diberi mikoriza arbuskula. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) yang terdiri atas 4 perlakuan dengan 5 ulangan. Perlakuan L0 adalah perlakuan kontrol/tanpa pemberian mikoriza arbuskula, perlakuan L1 adalah perlakuan dengan pemberian 5 gr mikoriza arbuskula per rumpun, perlakuan L2 adalah perlakuan dengan pemberian 10 gr mikoriza arbuskula per rumpun, sedangkan  perlakuan L3 adalah perlakuan dengan pemberian 15 gr mikoriza arbuskula per rumpun. Parameter yang diukur adalah tinggi tanaman, lebar daun, jumlah anakan, berat segar akar dan berat kering akar. Hasil penelitian menunjukkan bahwa aplikasi mikoriza arbuskula tidak berpengaruh (P0,05)  terhadap tinggi tanaman, lebar daun, jumlah anakan, berat segar akar dan berat kering akar.The Performance of Setaria sphacelata on Different Level of Arbuscular Mycorrhizal Abstract. A reaserch concerning effectivity ofarbuscular mycorrhizal applied on setaria (Setaria sphacelata) grass was conducted at Field Laboratory Peternakan (LLP) located on Utama Street Gampong Rukoh andat Nutritional Science dan Feed Technology Laboratory,Department of Animal Husbandry Faculty of Agriculture, Syiah Kuala University from February to April 2017. The objective of this research was to find setaria grass performance applied with arbuscular mycorrhizal. Completely Randomized Design was used in this research with 4 treatments (L0 = control/0 gr arbuscular mycorrhizal applied per clumps, L1 = 5 gr arbuscular mycorrhizal applied per clumps, L2 = 10 gr arbuscular mycorrhizal applied per clumps, and L3 = 15 gr arbuscular mycorrhizal applied per clumps. Plant height, leaf width, number of tillers, fresh root weight and dry root weight were the parameter determined. The statistical analisisindicated that there was no significant effect (P0.05) caused by treatments on plant height, leaf width, number of tillers, fresh root weight and dry rootweight. The results revealed that all level of arbuscular mycorrhizal applied showed no effectiveness on setaria grass performance. Abstract. A reaserch concerning effectivity ofarbuscular mycorrhizal applied on setaria (Setaria sphacelata) grass was conducted at Field Laboratory Peternakan (LLP) located on Utama Street Gampong Rukoh andat Nutritional Science dan Feed Technology Laboratory,Department of Animal Husbandry Faculty of Agriculture, Syiah Kuala University from February to April 2017. The objective of this research was to find setaria grass performance applied with arbuscular mycorrhizal. Completely Randomized Design was used in this research with 4 treatments (L0 = control/0 gr arbuscular mycorrhizal applied per clumps, L1 = 5 gr arbuscular mycorrhizal applied per clumps, L2 = 10 gr arbuscular mycorrhizal applied per clumps, and L3 = 15 gr arbuscular mycorrhizal applied per clumps. Plant height, leaf width, number of tillers, fresh root weight and dry root weight were the parameter determined. The statistical analisisindicated that there was no significant effect (P0.05) caused by treatments on plant height, leaf width, number of tillers, fresh root weight and dry rootweight. The results revealed that all level of arbuscular mycorrhizal applied showed no effectiveness on setaria grass performance.

scholarly journals PENGARUH PUPUK HAYATI MAJEMUK CAIR DAN PUPUK SINTETIK TERHADAP PERTUMBUHAN TANAMAN EDAMAME (Glycine max (L.) Merr)

2018 ◽  
Vol 3 (2) ◽  
Author(s):  
Lukman Fahmi ◽  
Arifah Rahayu ◽  
Yanyan Mulyaningsih
Keyword(s):  
Glycine Max ◽  
Soil Fertility ◽  
Root Weight ◽  
Higher Plant ◽  
Randomized Design ◽  
Synthetic Fertilizer ◽  
Glycine Max L ◽  
Number Of Leaves ◽  
Completely Randomized Design ◽  
Number Of Branches

Fertilizer administration is a way to increase the productivity of edamame plants.  Synthetic fertilizer is commonly used in edamame cultivation today.  However, excessive use of synthetic fertilizer could reduce soil fertility so that substitution of it with biofertilizer is needed.  This study was aimed at assessing the effects of biofertilizer and synthetic fertilizer administration on the growth and production of edamame plants.  A completely randomized design in a factorial pattern was used.  The first factor was biofertilizer rates consisting of three levels namely no fertilizer (0% R), 5 ml/l (50% R), and 10 ml/l (100% R).  synthetic fertilizer was given in five levels consisting of no fertilizer (0% R), 25% recommended rate (urea 37.5 kg/ha, SP-36 37.5 kg/ha, and KCl 25 kg/ha), 50% recommended rate (urea 75 kg/ha, SP-36 75 kg/ha, and KCl 50 kg/ha), 75% recommended rate (urea 112.5 kg/ha, SP-36 112.5 kg/ha, and KCl 75 kg/ha), and 100% recommended rate (urea 150 kg/ha, SP-36 150 kg/ha, and KCl 100 kg/ha).Results showed that plants given biofertilizer by 100% recommended rate had significantly higher height, number of leaves, and fresh and dry root weight in 5 weeks after planting (WAP).  Synthetic fertilizer administration by 100% recommended rate gave significantly higher plant height, number of branches, number of leaves, and fresh and dry root weight in 5 weeks after planting (WAP).  Interaction of 100% recommended rate of biofertilizer and 100% recommended rate of synthetic fertilizer resulted in significantly higher number of leaves and number of flowers. Keywords: edamame plant. Biofertilizer, synthetic fertilizer

scholarly journals PENGARUH BERBAGAI EKSTRAK AKAR DALAM STIMULASI INFEKSI CENDAWAN MIKORIZA ARBUSKULA (CMA) PADA Tithonia diversifolia

Jurnal Solum ◽  
2012 ◽  
Vol 9 (1) ◽  
pp. 36
Author(s):  
Agustian Agustian ◽  
Arwie Delfi ◽  
Lusi Maira
Keyword(s):  
Arbuscular Mycorrhiza ◽  
Imperata Cylindrica ◽  
Plant Roots ◽  
Mycorrhizal Symbiosis ◽  
Root Extract ◽  
Mold Growth ◽  
Tithonia Diversifolia ◽  
Intensity Of Infection ◽  
Randomized Design ◽  
Completely Randomized Design

In the first stage of arbuscular-mycorrhiza (AMF) fungi development on plant roots showed that root exudates, is a substance that determines the success of the establishment of mycorrhizal symbiosis. This secondary metabolites produced is intended to keep mold growth during the phase preinfection. Therefore, it is interesting to know whether to add the root extract of the plant could enhance CMA fungal infection in its host plant. The purpose of this study was to determine the type of root extract can stimulate CMA infection at the root and its influence on the growth of Tithonia diversifolia. This experiment used Completely Randomized Design (CRD) with 4 treatments and 3 replications, and continued with advanced test DNMRT at level 5%. The treatments assayed were: control, Tris-HCl buffer pH 7 (A), root extract of weed Imperata cylindrica (B); root extract of taro (C), and root extract of cassava (D). Base on the results obtained we concluded that the extract of the roots of weeds, taro and cassava does not give effect to the increased growth of Tithonia. However, the roots extract stimulated and had influenced on the percentage and intensity of AMF infection at the root of Tithonia and the number of spores obtained in the rhizosphere of Tithonia. In this case the root extract of taro showed the best stimulatory effect of infection with the percentage and intensity of infection are 99.3% and 30.59% consecutively with the number of spores found reach 113 spores/ 100 g soil.Key words: Stimulation, arbuscular-mycorrhiza, root extract, Tithonia diversifolia

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