scholarly journals Effect of nematicide rotation on banana (Musa AAA cv. Williams) root nematode control and crop yield

2019 ◽  
Vol 37 (2) ◽  
pp. 153-165
Author(s):  
Julio Jaramillo ◽  
Marlon Vintimilla ◽  
David Rubio ◽  
Gonzalo Soto ◽  
Mauricio Tobar ◽  
...  
Keyword(s):  
Crop Yield ◽  
Untreated Control ◽  
Block Design ◽  
Root Weight ◽  
Nematode Control ◽  
Net Profit ◽  
Randomized Complete Block Design ◽  
Living Root ◽  
Treatment Application ◽  
Banana Plantation

The effects of nematicide rotation on banana (Musa AAA cv. Williams) root weight, root nematode control, and crop yield were compared in a commercial banana plantation in Ecuador, testing six treatments in a randomized complete block design with six replicates. Treatments consisted of two, three and four different nematicide cycles per year plus the untreated control. Regarding the untreated plants and averaging the 24 root nematode samplings after treatment application, the nematicide applications reduced significantly R. similis (P<0.0001) between 20 and 49%, Helicotylenchus spp. (P<0.0001) between 31 and 51%, and total nematode populations (P<0.0001) between 29 and 49%. Accordingly, in the treated plants, there was an increase between 16 and 21% in living root weight (P=0.0003), and its percentage (P<0.0001) reached between 74.5 and 81.7% in the follower suckers. In addition, the death of roots by nematodes decreased (P=0.0009) between 20 and 46%. At harvest, nematicide applications increased bunch weight (P=0.0002; P=0.0467), ratio (P=0.0003 at 12 months), ratooning (P<0.0001; P<0.0001) and the number of boxes of 18.14 kg (P<0.0001; P=0.0005) per hectare per year at 12 and 24 months after treatment application, respectively. Plants treated with nematicides increased yield between 671 and 1,158 (12.2 - 21 t) and the number of boxes of 18.14 kg per hectare per year also increased between 545 and 1,046 (9.9 - 19.0 t), which resulted in a net profit between US $3,266 - $5,750 and between US $2,587 and $5,144 per hectare per year at 12 and 24 months after treatment application, respectively.

scholarly journals Effect of plant regulators on growth and flowering of 'Meyer' zoysiagrass

2013 ◽  
Vol 31 (3) ◽  
pp. 695-703 ◽  
Author(s):  
S.R. Marchi ◽  
D. Martins ◽  
N.V. Costa ◽  
J.R.V. Silva
Keyword(s):  
Plant Height ◽  
Mass Production ◽  
Untreated Control ◽  
Block Design ◽  
Dry Mass ◽  
Zoysia Japonica ◽  
Visual Effects ◽  
Visual Symptoms ◽  
Randomized Complete Block Design ◽  
Prohexadione Calcium

This trial aimed to evaluate the effect of sequential applications of different plant regulators over growth and flower rachis emission of 'Meyer' zoysiagrass (Zoysia japonica). The study was conducted on 15-month old green turfgrass under a randomized complete block design with four replications. The following plant regulator and doses were tested: trinexapac-ethyl (113+113, 226+113, 226+226, 452+113, 452+226, 452+452, 678+339 e 904+452 g a.i./ha-1), prohexadione-calcium (100+100 e 200+200 g a.i. ha-1) and bispyribac-sodium (40+40 e 60+60 g a.i. ha-1), as well as an untreated control. The turfgrass was mowed again at 3.0 cm aboveground and the second plant regulator was applied when 'Meyer' zoysiagrass was between 5.0 and 6.0 cm high. The effect of the treatments was visually rated for visual injury, plant height, height and number of flower rachis, and total dry mass production of clippings. Only bispyribac-sodium had visual symptoms of injury on 'Meyer' zoysiagrass, and no intoxication was observed at 28 days after the second application (DAAB). The sequential applications of trinexapac-ethyl, prohexadione-calcium and bispyribac-sodium reduced by more than 80% the total clipping dry mass produced by 'Meyer' zoysiagrass. All the plant regulators tested also showed promising results in reducing the height and emission of rachis, especially when trinexapac-ethyl was applied at the doses 452+452, 678+339 and 904+452 g a.i. ha-1. 'Meyer' zoysiagrass turfgrass can be handled with the sequential application of a plant regulator, which reduces the need for mowing over a period up to 110 days after the application of the second plant regulator, and it also avoids deleterious visual effects over turfgrass.

Effect of drought on ericoid mycorrhizae in wild blueberry (Vaccinium angustifolium Ait.)

2003 ◽  
Vol 83 (3) ◽  
pp. 583-586 ◽  
Author(s):  
E. Jeliazkova and D. Percival
Keyword(s):  
Spatial Distribution ◽  
Soil Depth ◽  
Block Design ◽  
Soil Profiles ◽  
Root Weight ◽  
Vaccinium Angustifolium ◽  
Ericoid Mycorrhizae ◽  
Randomized Complete Block Design ◽  
Influence Of Water ◽  
Wild Blueberry

To evaluate the influence of water exclusion on the mycorrhizal coloni zations in wild blueberry, and to examine the spatial distribution of mycorrhizae among roots of wild blueberry plants that were in both the vegetative and cropping stages of production, a randomized complete block design was used. The mycorrhizal coloniz a tions were equally distributed throughout upper and lower soil profiles in both stages of production. Nevertheless, soil moisture levels in water exclusion treatments were as much as 50% lower than the control, drought stress had no effect on mycorrhizal colonization levels or on any other of the measured responses. Root weight and volume decreased as soil depth increased from 0-7.5 to 7.5-15 cm. Key words:

scholarly journals Effect of the Intensity of Weed Harrowing with Spike-Tooth Harrow in Barley-Pea Mixture on Yield and Mycobiota of Harvested Grains

Agronomy ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 103 ◽  
Author(s):  
Rafał Ogórek ◽  
Agnieszka Lejman ◽  
Piotr Sobkowicz
Keyword(s):  
Crop Yield ◽  
Block Design ◽  
Fungal Abundance ◽  
Grain Moisture ◽  
Internal Structures ◽  
Mechanical Methods ◽  
Randomized Complete Block Design ◽  
Chlorophenoxyacetic Acid ◽  
The Relationship

Harrowing is one of the most popular mechanical methods to control weeds. Nevertheless, the relationship between the effect of different harrowing intensities using spike-tooth harrow in barley-pea intercrop on the yield and mycoflora of grains has not yet been studied. Therefore, the aim of this study was to assess the effect of harrow intensity using spike-tooth harrow in barley-pea mixture on the mycological quality of harvested grains, grain yield, as well as influence of barley and pea grain moisture on the abundance of fungi. The field experiment was carried out during 2010–2012, and it was conducted using a randomized complete block design with four replicates. Weed control was mechanical and chemical. In this study, we have shown that harrowing in barley-pea intercrops does not reduce the yield of either mixture components, both with respect to grain quantity or mycological quality after harvest, compared to controls—without harrowing and the herbicide MCPA (2-methyl-4-chlorophenoxyacetic acid). However, increasing the intensity of harrowing did not result in a consistently larger crop yield or reduction in fungal abundance in the grains. The grains’ internal structures and surface of both tested components of the mixture were colonized to a large extent by cosmopolitan fungi, of which Alternaria alternata (Fr.) Keissl. was the most abundant.

scholarly journals PENGGUNAAN SENYAWA OSMOLIT DAN ALKALIN PADA PENYADAPAN TANAMAN KARET (Hevea brasiliensis)

2019 ◽  
Vol 3 (2) ◽  
pp. 110-120
Author(s):  
Mochlisin Andriyanto ◽  
Miftahul Huda Fendiyanto
Keyword(s):  
Experimental Design ◽  
Hevea Brasiliensis ◽  
Block Design ◽  
Randomized Complete Block Design ◽  
The Common ◽  
North Sumatra ◽  
Treatment Application

Stimulants are one of the common ways to increase yield in rubber plants. Recent, the stimulant that is widely used in rubber tapping is ethephon. Ethephon material can prolong the flow of latex so that yield increases. The combination of osmolyte and alkaline compounds is expected to be an alternative stimulant. Therefore, this study aimed to examine the use of osmolytes and alkaline in rubber plants. This research was conducted at the Experimental Design of the Sungei Putih Estate Research, Deli Serdang, North Sumatra in May-September 2016 with PB 260 clones planting year 2010 with a tapping system S/2 D3 Ga1.0 6 / y (m) in panel B0-2. The experimental design used was a Randomized Complete Block Design (RCBD) with 28 combinations of treatments. The observation parameters in this study were yield (g/p/s), girth (cm) before treatment application and yield (g/p/s) and yield (kg/ha/year) after treatment application. The observations showed that the addition of stimulants with osmolyte and alkaline compounds had a significant effect yield on rubber (g/p/s) in the first tapping slices. The 5% osmolyte and 10% alkaline compounds have yield rubber which is comparable to the application of stimulants made from ethephon in the first tapping slices. Application of 5% osmolyte and 10% alkaline compounds can be used as an alternative stimulant in rubber plants.

scholarly journals INLUENCE OF MULCH AND IN-GROUND AMENDMENTS ON ROOT WEIGHT AND DISTRIBUTION OF RABBITEYE BLUEBERRIES.

HortScience ◽  
1990 ◽  
Vol 25 (8) ◽  
pp. 852c-852 ◽  
Author(s):  
D.L. Creech ◽  
C. Martindale ◽  
R. Rankin
Keyword(s):  
Organic Matter ◽  
Plant Height ◽  
Block Design ◽  
Drip Line ◽  
Pine Bark ◽  
Root Weight ◽  
Wide Strip ◽  
Randomized Complete Block Design ◽  
Below Ground ◽  
Organic Matter Fractions

Brightwell and Climax plants were established in March, 1987, under the following above-ground treatments: 1) polyfabric weed barrier, 2) a 6 cm deep, 1-meter wide strip of continuous bark, and 3) zero. Below-ground treatments included, 1) 19 liters peatmoss, 2) 19 liters pine bark, 3) a continuous bark strip, tilled in, and 4) zero. A randomized complete block design was utilized with above-ground treatments as main plots and in-ground. treatments as split plots. After three years, plants under polyfabric had higher above-ground dry weights, growth indexes, plant height, root dry weights and root lengths than plants under continuous bark or zero. In the deep, coarse, easily-leached sand, all roots were very shallow (0-20cms) and concentrated along the drip line and in organic matter fractions. There were no significant differences between in-ground treatments.

scholarly journals Effect of Organic Manure and Agricultural Lime on Growth and Yield of Two Bean Varieties

2019 ◽  
pp. 1-18
Author(s):  
E. A. Effa ◽  
A. A. J. Mofunanya ◽  
B. A. Ngele
Keyword(s):  
Block Design ◽  
Chemical Properties ◽  
Organic Manure ◽  
Growth And Yield ◽  
Cross River State ◽  
Physico Chemical ◽  
Randomized Complete Block Design ◽  
Number Of Leaves ◽  
Treatment Application ◽  
Local Farmers

Aim: This study evaluates the effects of soil amendment with organic manure-OM and agricultural lime-AL on the growth and yield of Phaseolus vulgaris and Vigna aconitifolia grown on soils with 3 different pH (locations) in Southern Cross River State. Study Design: The study was laid in randomized complete block design (RCBD) with three replications. Place and Duration of Study: This study was carried out at the Greenhouse, Department of Plant and Ecological Studies, University of Calabar for a period of 3 months. Methodology: The three locations were: Akamkpa with pH 4.0, Calabar Municipality with pH of 7.0 and Odukpani with pH of 9.0. The treatments were; control (0 g), OM1 (100 g organic manure), OM2 (200g organic manure), AL1 (100 g agricultural lime), AL2 (200 g agricultural lime), OM1 + AL1 (50 g organic manure + 50 g agricultural lime) and OM2 +AL2 (100 g organic manure and 100 g agricultural lime. Results: Results obtained from the physico-chemical properties of the soil before treatment application revealed low nutrients and minerals which increased after treatment application. Six weeks after planting, there were significant increase in plant height (p<0.05) of P. vulgaris and V. aconitifolia on soil from Akamkpa (169.66 cm) and Odukpani (146.63 cm) treated with OM2 + AL2 compared to 43.77 cm and 71.77 cm from control. Leaf area, petiole length, number of leaves were all significantly improved especially at 8 weeks after planting. Fresh weights of leaf, stem and root revealed higher yield (p<0.05) at the final harvest recorded as 8 weeks after planting than the amount at 4 weeks after planting. The results obtained from the pod number, pod weight and number of seed showed significant improvement after treatment application. Conclusion: The findings of this study strongly support the use of organic manure and agriculture lime as affordable and accessible sources of manure especially for our local farmers.  

scholarly journals Evaluation of different chemical fungicides against rice blast in field conditions

2021 ◽  
Vol 4 (2) ◽  
pp. 295-302
Author(s):  
Rachana Moktan ◽  
Anjeela Aryal ◽  
Sagar Karki ◽  
Ashbin Kumar Devkota ◽  
Basistha Acharya ◽  
...  
Keyword(s):  
Grain Yield ◽  
Untreated Control ◽  
Rice Blast ◽  
Technical College ◽  
Block Design ◽  
Susceptible Variety ◽  
Weekly Interval ◽  
Leaf Blast ◽  
Randomized Complete Block Design ◽  
Chemical Fungicides

Evaluation of different fungicides against rice blast was carried out in research plot of the Agronomy farm of IAAS, Prithu Technical College, Lamahi Municpality, Dang district of the Lumbini Province, inner terai region of Nepal during June to November, 2017. The objective of the experiment was to evaluate the efficiency of different chemical fungicides against rice blast. The experiment was conducted in Randomized Complete Block Design with the use of susceptible variety ‘Mansuli’. Different fungicides like Hexaconazole 5% SC (Udaan), Propiconazole 25% EC (Tilt), Captan 70% + Hexaconazole 5% WP, Validamycin 3% L, Tricyclazole 75% WP (TRIP) and Biomycin (Kasugamycin 3% S.L.) were applied five times at weekly interval with the doses of 2mL/L of H2O, 1.5mL/L of H2O, 2g/L of H2O, 2mL/L of H2O, 2g/L of H2O and 2mL/L of H2O respectively. From the result, it was concluded that all the fungicides were effective in controlling leaf blast but Tricyclazole 75% WP (TRIP) was more effective among other fungicides and untreated control plots with least leaf blast severity (27.85%), least incidence (35.5%), least mean AUDPC (64.64%) and highest grain yield (3.93 t ha-1) followed by Biomycin. It is thus concluded that fungicide Tricyclazole 75% WP should be sprayed five times at weekly interval for the management of leaf blast in rice.

scholarly journals INTEGRATED PEST MANAGEMENT OF MUSTARD APHID, LIAPHIS ERYSIMI (KALT.) ON RAPESEED CROPS IN GOKULESHWOR, BAITADI

2021 ◽  
Vol 2 (2) ◽  
pp. 61-63
Author(s):  
Santoshi Malla ◽  
Lal Bist ◽  
Yogesh Singh Dhanuk ◽  
Aasih Neupane
Keyword(s):  
Field Experiment ◽  
Pest Management ◽  
Untreated Control ◽  
Management Practices ◽  
Block Design ◽  
Rabi Season ◽  
Mustard Aphid ◽  
Randomized Complete Block Design ◽  
Cow Urine ◽  
Almost All

An experiment was conducted at Gokuleshwor, Baitadi to evaluate the management practices of Lipaphiserysimi (Kalt.) during Rabi season in 2017/18.Field experiment was laid out in a randomized complete block design (RCBD) with 5 treatments and 3 replications. The treatments were:1) jholmol @250 ml/litre of water2) 2) Altineem @2.5ml/litre of water 3) Cow urine @250 ml/litre of water 4) Mustard cake @25kg/ha and 5) untreated (control). Each plot consists of 2m*2m (4m2). Field experiment showed that the highest reduction of Lipaphiserysimi (Kalt.) was achieved in jholmol followed by altineem but these two treatments were statistically at per during almost all the spray times. Thus, jholmol might be the best option in eco-friendly management of Lipaphiserysimi (Kalt).

scholarly journals Yield of lettuce grown in hydroponic and aquaponic systems using different substrates

2018 ◽  
Vol 22 (8) ◽  
pp. 525-529 ◽  
Author(s):  
Rodrigo A. Jordan ◽  
Evaldo F. Ribeiro ◽  
Fabricio C. de Oliveira ◽  
Luciano O. Geisenhoff ◽  
Elton A. S. Martins
Keyword(s):  
Crop Yield ◽  
Crop Yields ◽  
Production Systems ◽  
Block Design ◽  
Coconut Shell ◽  
Phenolic Foam ◽  
Expanded Vermiculite ◽  
Nutrient Film Technique ◽  
Randomized Complete Block Design ◽  
Hydroponic Systems

ABSTRACT This study had as objective to evaluate the effect of the substrate on the yield of lettuce grown in aquaponic and hydroponic systems. The study was conducted at the Federal University of Grande Dourados, located in Dourados, MS. A randomized complete block design was used, with three treatments and 16 replicates. The cultivation systems were analyzed independently. The substrates analyzed were: coconut shell fiber, phenolic foam and expanded vermiculite. The plants were grown in two systems (aquaponic and hydroponic), using the NFT (Nutrient Film Technique) system. The crop used was lettuce cv. ‘Alcione’. The parameters analyzed were: crop yield and percentage of roots per plant. In addition, macronutrient contents were analyzed in the leaves. The substrate composed of coconut shell fiber was more suitable for lettuce production, since it led to higher yields for both aquaponic (2.88 kg m-2) and hydroponic (2.58 kg m-2) systems. The use of phenolic foam as growing substrate led to lower mean crop yields in both production systems analyzed, 1.94 and 2.15 kg m-2 for aquaponic and hydroponic systems, respectively.

scholarly journals Effects of Pesticides on Vegetative Growth and Fruit Yield of Seedless Mandarin at the Basic Design Period in Thai Nguyen Province, Vietnam

2019 ◽  
pp. 1-6
Author(s):  
Nguyen Minh Tuan ◽  
Ha Minh Tuan ◽  
Luan Thi Dep ◽  
Nguyen Ngoc Lan
Keyword(s):  
Study Design ◽  
Fruit Quality ◽  
Vegetative Growth ◽  
Block Design ◽  
Fruit Yield ◽  
Basic Design ◽  
Fruit Character ◽  
Randomized Complete Block Design ◽  
Treatment Application

Aims: This study was carry out to evaluate the effects of pesticide on vegetative growth, fruit yield, fruit quality of sweet seedless Mandarin citrus seedless in basic design period at Thai Nguyen province Study Design: The study was carried out in Dai Tu district, Thai Nguyen province in 2017-2018. The experiment included three treatments were designed in Randomized Complete Block Design with three replications. Results and Discussion: The vegetative growth of tree and shoot, fruit character and fruit quality was collected. Results indicated that T2 treatment (Trebon 10 EC) had the best results in vegetative growth, fruit quality and fruit yield. Conclusion: It was concluded that T2 treatment application has greatly enhanced vegetative growth, fruit character, and fruit quality of sweet seedless Mandarin under field conditions.

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