scholarly journals Relative toxicity of two natural compounds compared to abamectin against some soybean pests under period rates

OCL ◽  
2021 ◽  
Vol 28 ◽  
pp. 32
Author(s):  
Hala Hussien Alakhdar ◽  
Zeinab Elsayed Ghareeb
Keyword(s):  
Humic Acid ◽  
Integrated Management ◽  
Natural Compounds ◽  
Nano Particles ◽  
Sustainable Pest Management ◽  
Relative Toxicity ◽  
Phenacoccus Solenopsis ◽  
Control Target ◽  
Experimental Treatments ◽  
Plot Design

A sustainable pest management in agro-ecosystems requires parallel assessments of pesticide and natural compounds to control target pests. In the present study, a semi-field experiment was conducted to evaluate the relative toxicity of abamectin (Abamax), humic acid, and Chitosan Nano-Particles (C.N.Ps) against four soybean pests: Tetranychus urticae, Eutetranychus orientalis, Bemisia tabaci, and Phenacoccus solenopsis. The experimental treatments were arranged in a split-plot design with three replicates, where treatments were assigned to main plots and pest populations under different periods in the subplots. The obtained results and graphs demonstrated that there were considerable differences between the total numbers of pests after different periods of treatment. Generally, E. orientalis recorded the minimum pest number at all. Different tested compounds demonstrated a considerable correlation between the densities of the pests. T. urticae exhibited a significant correlation with the other three pests (E. orientalis, B. tabaci, and P. solenopsis). E. orientalis did not correlate with B. tabaci and P. solenopsis. The humic acid recorded the best effect on T. urticae after 3 days with a reduction of 85.45% and E. orientalis after 7 days 65.55%. However, Chitosan Nano-Particles (C.N.Ps) was the best for E. orientalis after 14 days (mortality 74.36%). In contrast, abamectin (Abamax) had a general mean of reduction of 91.17% against T. urticae, whenever, these compounds are promising for controlling T. urticae, E. orientalis, B. tabaci, and P. solenopsis. These results may be a supporting method to overcome some soybean pests. The findings are discussed within the context of integrated management of soybean pests under semi-field conditions.

Testing Integrated Management Strategies for Tall Buttercup (Ranunculus acris) in Irrigated Hayfield Meadows

2015 ◽  
Vol 8 (4) ◽  
pp. 385-392
Author(s):  
Hally K. Strevey ◽  
Jane M. Mangold
Keyword(s):  
Management Strategy ◽  
Integrated Management ◽  
Management Strategies ◽  
Forage Production ◽  
Canadian Province ◽  
Herbicide Treatments ◽  
Production Research ◽  
Second Year ◽  
Ranunculus Acris ◽  
Plot Design

AbstractTall buttercup is an invasive forb that has been reported in all but eight states and one Canadian province. The species has been of concern in Montana where it has invaded over 8,300 ha, and it has been particularly problematic in irrigated hayfield meadows that are used for forage production. This study sought to develop an integrated management strategy to control tall buttercup while maintaining forage production. Research was conducted over 2 yr at flood-irrigated and subirrigated hayfield meadows near Twin Bridges, MT. Treatments were randomly applied in a split-plot design with four replications at both sites. Herbicide treatments occurred at the whole-plot level: nonsprayed, aminopyralid (172 g ai ha−1), aminocyclopyrachlor + chlorsulfuron (83 g ai ha−1+ 33 g ai ha−1), and dicamba (981 g ai ha−1). Split plots consisted of mowing and fertilization (28 kg N ha−1). All herbicides provided up to 2 yr of tall buttercup control at both sites. In the second year, aminocyclopyrachlor + chlorsulfuron and aminopyralid reduced tall buttercup by 93% and 96%, respectively, for the subirrigated and flood-irrigated sites. At the subirrigated site, mowing reduced tall buttercup by 71%, and fertilization reduced it by 57%. Forage decreased following aminocyclopyrachlor + chlorsulfuron treatments. The integration of herbicide, mowing, and fertilization did not improve tall buttercup control.

Phytoremediation of lead and cadmium by thornless honey loccust trees’(Gleditsia triacanthos L. var. inermis) in contaminatedsoil near the Tehran-Karaj highway

2016 ◽  
Vol 50 (6) ◽  
Author(s):  
Elham Faraji Dizaji ◽  
Mohsen Kafi. ◽  
Ahmad Khalighi ◽  
Sepideh Kalateh Jari
Keyword(s):  
Growth Period ◽  
Maximum Level ◽  
Contaminated Sites ◽  
Chlorophyll B ◽  
Gleditsia Triacanthos ◽  
Lead And Cadmium ◽  
Experimental Treatments ◽  
Sampling Times ◽  
Pb Concentration ◽  
Plot Design

Phytoremediation is an emerging technology that uses plants to remove pollutants from contaminated sites. The present study examined the absorption of heavy metals by Gleditsia triacanthos L. var. inermis, a tree species planted in the landscape in Tehran-Karaj highway (Iran). This study was arranged in a split plot design with three replications. Experimental treatments included distances of planted trees from highway (30, 65, and 80 m) and three different sampling times (i.e. opening of leaves, late of June, and before the fall). The results showed that with the passage of time and approaching the fall, Pb concentration significantly increased. The highest concentration of Cd was observed in the mid-growth period. With increasing the distance, chlorophyll significantly increased. However, chlorophyll b and total chlorophyll were not influenced by the distance from the highway. The interaction of the distance and sampling time demonstrated that in the nearest distance from the highway, the concentration of chlorophyll decreased with the passage of time, while in the distance of 65 and 80 m from the highway, the concentration of chlorophyll increased in the middle of the growth period. In the nearest distance from the highway, the concentration of Pb significantly increased with the passage of time. By approaching fall, Pb concentration increased in 65 and 80 m from the highway. In the nearest distance from the highway, during mid-growth period, Cd concentration reached its maximum level.

scholarly journals Pengaruh Pemupukan N dan Frekuensi Pemangkasan Tajuk pada Aspek Agronomis dan Hasil Tanaman Ubi Jalar (Ipomoea batatas (L.) Lam.) var. Kretek

Jurnal Agro ◽  
10.15575/856 ◽  
2016 ◽  
Vol 3 (2) ◽  
pp. 8-20 ◽  
Author(s):  
Nur Edy Suminarti
Keyword(s):  
Leaf Area ◽  
Ipomoea Batatas ◽  
Growth Analysis ◽  
Average Difference ◽  
N Application ◽  
Leaf Area Duration ◽  
Main Plot ◽  
Four Levels ◽  
Experimental Treatments ◽  
Plot Design

Penelitian yang bertujuan untuk mendapatkan informasi tentang pemupukan N dan frekuensi pemangkasan tajuk yang tepat pada tanaman ubi jalar (Ipomoea batatas (L.) Lam.). penelitian dilakukan di Kebun Percobaan Universitas Brawijaya, di Desa Jatikerto, Malang. Rancangan perlakuan yang digunakan adalah Petak Terbagi, dosis pupuk N ditempatkan pada petak utama, terdiri dari 4 taraf : (1) tanpa dipupuk N, (2) dipupuk 67,5 kg N ha-1, (3) dipupuk 135 kg N ha-1 dan (4) dipupuk 202,5 kg N ha-1. Pemangkasan tajuk ditempatkan pada anak petak, terdiri dari 4 macam : (1) tanpa dipangkas, (2) dipangkas 1 kali, (3) dipangkas 2 kali dan (4) dipangkas 3 kali. Pengumpulan data dilakukan secara destruktif meliputi luas daun, masa luas daun, panjang umbi, diameter umbi, bobot umbi per tanaman dan indeks pembagian. Uji F taraf 5% digunakan untuk menguji pengaruh perlakuan, sedangkan perbedaan diantara perlakuan didasarkan pada nilai Duncan taraf 5%. Hasil penelitian menunjukkan terjadi interaksi nyata pada luas daun, masa luas daun dan bobot umbi per tanaman. Luas daun dan masa luas daun tertinggi umumnya didapatkan pada pemupukan N dosis 202,5 kg N ha-1 dengan tanpa maupun dengan pemangkasan tajuk 1 kali. Bobot umbi per tanaman tertinggi didapatkan pada tanaman yang diberi pupuk N dengan dosis 135 kg N ha-1 dan pemangkasan tajuk 1 kali.     A field reaserch that aimed to get the appropriate of N application and frequency of topping was conducted in the experimental field of Brawijaya University, located in Jatikerto village, Malang. The experimental treatments consist of  four  levels of N (0 ; 67.5 kg N ha-1, 135 kg N ha-1 and 202.5 kg N ha-1) and four levels frequency of topping (without topping, 1, 2, and 3 of topping). These treatments were arranged in a split plot design; N application in the main plot and frequency of  topping in the subplot with three replications. Data was collected destructively including component of growth, component of yield and plant growth analysis.  F test at 5% is used to determine the effect of treatments, while the average difference between treatments was referred to Duncan value at 5%. The result showed there were significantly interaction between N application and frequency of topping on component of growth and   weight of tuber per plant.   Combination of N application dosage 202.5 kg ha-1 and non or once topped had resulted the highest of leaf area and leaf area duration. While the highest of weight tuber per plant was obtained on  N dosage 135 kg ha-1 and topping one times.

Preparation of Fe3O4-chitosan hybrid nano-particles used for humic acid adsorption

2016 ◽  
Vol 6 ◽  
pp. 64-75 ◽  
Author(s):  
Muhammad Ali Zulfikar ◽  
Sonita Afrita ◽  
Deana Wahyuningrum ◽  
Mia Ledyastuti
Keyword(s):  
Humic Acid ◽  
Nano Particles

scholarly journals EFFECT OF AMELIORANT ON GROWTH AND YIELD OF RICE AT TIDAL PADDY FIELD

2021 ◽  
Vol 22 (2) ◽  
pp. 85
Author(s):  
Sri Minarsih ◽  
Sri Karyaningsih ◽  
Samijan Samijan ◽  
Agus Supriyo ◽  
Yulis Hindarwati ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Humic Acid ◽  
Paddy Field ◽  
Organic Fertilizer ◽  
Paddy Fields ◽  
Growth And Yield ◽  
Food Crop ◽  
Rice Varieties ◽  
Main Plot ◽  
Plot Design

<p>Rice (<em>Oryza sativa </em>L.) is the most important and strategic food crop in Indonesia, but low productivity in tidal paddy fields is a serious problem that must be overcome. The application of ameliorant would be worthy to increase the growth and yield of rice in tidal paddy fields. The study aimed to investigate the effect of ameliorant application on growth and yield of rice varieties in tidal paddy fields. The study was arranged in a split plot design with five replications. Rice varieties tested were Inpari 34, Dendang, Inpara 9, Inpari 35, and Ciherang as the main plot, and ameliorant types studied were humic acid, gypsum, zeolite, and organic fertilizer as the subplot. The results showed that the use of different rice varieties and amelioran types significantly increased the growth and yield of rice. Inpara 9 produced 7.6 t.ha-1 dry milled grain (DMG) or increased by 33.3% compared to Ciherang variety. Humic acid application at 25 kg ha-1 increased grain yield by 21.3% higher than that without ameliorant treatment. The best treatment to increase the growth and yield of rice in tidal paddy field was a combination of humic acid 25 kg.ha-1 and Inpari 34 which produced the DMG of 8.6 t ha-1 or 41% higher compared to Ciherang without ameliorant.</p>

Enhanced mungbean and water productivity under full irrigation and stress using humic acid in arid regions

2017 ◽  
Author(s):  
Abdulmohsin R. Al-Shareef ◽  
Fathy S. El-Nakhlawy ◽  
Saleh M. Ismail
Keyword(s):  
Humic Acid ◽  
Seed Yield ◽  
Yield Components ◽  
Arid Regions ◽  
Water Regime ◽  
Water Productivity ◽  
Soil Surface ◽  
Research Station ◽  
King Abdulaziz University ◽  
Plot Design

A field experiment was conducted during 2016 and 2017 seasons at the Agriculture Research Station of King Abdulaziz University at Hada Al-Sham, Saudi Arabia in a split plot design to investigate the response of Mungbean [(Vigna radiate (L.)Wilczek] MN-96 cv. to three irrigation water regimes(100%, 80% and 60% of water requirements)and three humic acid (HA) rates (15, 30 and 45 kg/ha HA) was mixed with the soil surface. Seed yield and yield components were significantly similar under 30 and 45 kg HA/ha. No significantly differences were showed between seed yield/ha, yield components and IWUE under the 80% water regime with45 kg/ha HA and 100% water regime with 15 kg/ha HA.

scholarly journals Effect of Humic Acid, Gibberellin and Tryptophan on The Growth and Flowering Characteristics of Goldenrods Plant Tolidago Canadensis

2021 ◽  
Vol 910 (1) ◽  
pp. 012128
Author(s):  
Zainab Abdul Hussein Mahdi ◽  
Janan Kassim Hussein
Keyword(s):  
High School ◽  
Humic Acid ◽  
Leaf Area ◽  
Plant Height ◽  
Foliar Application ◽  
Factorial Experiment ◽  
Vase Life ◽  
Plant Seeds ◽  
Number Of Branches ◽  
Plot Design

Abstract The experiment was conducted in high school of Al-Hilla agricultural for the summer and autumn season 2020 to study the effect of humic acid and foliar application of gibberellin and tryptophan acid on the growth of the goldenrods plant resulting from the cultivation of solidago candasis which took it from residues of plant seeds growing. However, the first factor was humic acid, plants treated with humic acid were (H0 control, H1=5 ml/L), the second factor was the foliar application of gibberellin acid with the two levels (G1=100 mg/liter, G2=200 mg/L) and third factor was tryptophan acid with two three levels (T0=without treated, T1=100 mg/L, T2=150 mg/L). The experiment was conducted as a factorial experiment (2×3×3) with split-plot design according to the randomized complete blocks design (R.C.B.D) with three replicates. The results showed that humic acid fertilization improved the studied characteristics of the goldenrods plant. While treatment with gibberellin acid at concentration of 100 mg/liter due to improve the number of branches, leaf area and the number of inflorescences and the percentage of carbohydrates, whereas, treatment with concentration of 200 mg/liter leds to improve of plant height, length of inflorescence and vase life. As for the treatment with tryptophan acid, the concentration 150 mg/L improved all the studied parameters.

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