AMA, Agricultural Mechanization in Asia, Africa and Latin America
AMA, Agricultural Mechanization in Asia, Africa and Latin America (AMA) (issn: 00845841) is a peer reviewed journal first published online after indexing scopus in 1982. AMA is published by Farm Machinery Industrial Research Corp and Shin-Norinsha Co. AMA publishes every subjects of general engineering and agricultural engineering.
WOS Indexed (2026)
30 Jun 2026 (Vol - 57 , Issue- 07 )
31 Jul 2026 (Vol - 57 , Issue 07 )
Aim and Scope :
AMA, Agricultural Mechanization in Asia, Africa and Latin America
AMA, Agricultural Mechanization in Asia, Africa and Latin America (ISSN: 00845841) is a peer-reviewed journal. The journal covers Agricultural and Biological Sciences and all sort of engineering topic. the journal's scopes are in the following fields but not limited to:
Agricultural and Biological Sciences
Electrical Engineering and Telecommunication
Electronic Engineering
Computer Science & Engineering
Civil and architectural engineering
Mechanical and Materials Engineering
Transportation Engineering
Industrial Engineering
Industrial and Commercial Design
Information Engineering
Chemical Engineering
Food Engineering
Effects of genotypic diversity on population density of natural enemies of soybean
To test the effects of genotypic diversity on natural enemy population of soybean insect-pests an experiment was laid in kharif 2018 and 2019 at the Entomology Research Farm of ICAR-Indian Institute of Soybean Research, Indore. Totally 20 treatments were chosen for this experiment and out of the twenty treatments four treatments namely, T1, T6, T11 and T16 were four varietal mixture treatments. The results of the effects of genotypic diversity on natural enemy population of soybean insect-pests were revealed that highest population of coccinellids (2.32 coccinellids/m2) and spiders (11.74 spider/ m2) were found in treatment T16 (mixture of NRC-37, JS-9752, RSC-1046 and RKS-113) while rove beetle (2.54 rove beetle / m2) was found in treatment T1 (Mixture of JS-9560, JS-20-34, MAUS-47 and MACS-1460). Canthconidia (6.67 Canthconidia/m2) and Hover fly (11.74 hover fly/m2) were found highest in treatment T6 (JS-9305, JS-2029, RVS-2001-4 and Dsb-28-3) while predatory thrips (2.44 predatory thrips) was found in T11 (mixture of NRC-86, JS-335, JS-2098 and RKS-45). For insect pathogens the highest infected larva of defoliators viz., semoloopers and Spodoptera litura etc. by entomopathogenic fungi, Beaveria basiana (4.61 infected larva/m2) entomopathogenic fungi was found in T11 while Nomuriya rileyi (10.67 infected larva/m2) infected defoliators larva was found in T16. In case of parasitoids i.e., Encarsia transvenna (22.87 parasitized pupae/leave) (whitefly parasitoids) and braconids (3.69 parasitized pupae/leave) (lepidopterous parasitoid) were found highest in T16 (mixture of NRC-37, JS-9752, RSC-1046 and RKS-113). So, it is evident from above results that genotypic diverse treatments (varietal mixtures) have more number of all kinds of natural enemies than their respective sole varietal treatments.
Effect of Gibberellic Acid and Maleic Hydrazide on morphological and reproductive characters of okra [Abelmoschus esculentus (L.) Moench]
Field experiment was conducted to investigate the "Effect of Gibberellic Acid and Maleic Hydrazide on Growth of Okra [Abelmoschus esculentus (L.) Moench]" at V.P.O. Maheru, Tehsil Phagwara, District Kapurthala, Punjab under the Department of Horticulture, Lovely Professional University, Phagwara, Jalandhar, Punjab during the year 2018-19. The experiment utilized plant growth regulators and growth retardant, specifically gibberellic acid and maleic hydrazide, at varying concentrations in a Randomized Block Design layout. The results demonstrated that significantly higher growth parameters, such as plant height (98.00 cm) and leaf area index (2.016), were achieved with the application of Maleic Hydrazide 60 ppm combined with GA3 60 ppm. Additionally, the number of leaves per plant (33.18) and branches per plant (4.46) at 75 days after sowing (DAS) were recorded with the application of Maleic Hydrazide 100 ppm combined with GA3 60 ppm. Earliest flowering (36 days) was observed with the application of Maleic Hydrazide 100 ppm combined with GA3 60 ppm. Gibberellic acid promotes plant growth by enhancing cell elongation, while maleic hydrazide acts as a growth retardant, reducing excessive vertical growth while promoting branching. Combination of these chemicals at different concentrations showed improvements in various growth parameters such as plant height, leaf area, and early flowering. This indicates that the balanced use of growth regulators can optimize plant development and yield in okra cultivation.
A Review on Emerging Insights into Bacterial Leaf Blight of Rice: Diagnostics, Climate Dynamics, and Economic Impact
Bacterial Leaf Blight (BLB), caused by Xanthomonas oryzae pv. oryzae, is a devastating disease that significantly impacts rice productivity, leading to severe yield losses in many rice-growing regions worldwide. This review aims to provide a comprehensive synthesis of recent advancements in the diagnostics, epidemiology, and management of BLB, while examining its economic impact and the influence of climate change on disease dynamics. Traditional diagnostic methods, including visual assessment and bacterial isolation, are being complemented by advanced molecular tools such as PCR, real-time PCR, and CRISPR-based methods, which offer enhanced accuracy and early detection capabilities. Climate variability, including increased temperatures, humidity, and extreme weather events, has been shown to affect the incidence and severity of BLB, facilitating the pathogen's spread to non-endemic regions. Furthermore, the economic burden of BLB management, particularly for smallholder farmers, poses a threat to food security and market stability. Recent case studies from Asia highlight the substantial financial losses caused by BLB, emphasizing the need for integrated management strategies. Advances in host resistance through gene pyramiding and breeding for climate-resilient varieties, combined with biological control and optimal cultural practices, are critical for sustainable BLB management. This review identifies key knowledge gaps, such as the need for novel diagnostic tools, climate-resilient rice varieties, and an improved understanding of pathogen evolution. Policy recommendations are provided to enhance international collaboration and strengthen research and extension services, ultimately aiming to mitigate the economic impact of BLB on global rice production under changing climate conditions.
Effects of different soybean genotypes on the biology and food consumption and nutritional indices of Spodoptera litura (Fabricius)
The effect of forty six (46) different soybean genotypes on the biology and food consumption and nutritional indices of Spodoptera litura (Fabricius) (Noctuidae:Lepidoptera) have been studied. Differences in various biological parameters viz., incubation period, larval duration, pre pupal period, pupal period, longevity of adults) of S. litura were observed on different genotypes. The shortest larval, pre pupal and pupal period was found in larvae reared on CAT 2503 (13.19 days) and F3P18 (1.23 and 7.07 days), respectively. The shortest pre-oviposition and oviposition period was found in larvae reared on CAT 1847 (2.02 and 3.05 days), post-oviposition period in CAT 488 (2.75 days), respectively. The total life period of male was found larvae reared on in F4P21 (28.15 days) and female was in CAT 488 (31.20 days), respectively. Longevity of both male and female was observed in F3P18 (6.64 and 9.72 days, respectively). The lowest per cent adult emergence, sex ratio, fecundity and incubation period was observed in F4P21 (68.40), F3P18 (1:1.19 and 216.8 eggs) and CAT 349 (2.56 days), respectively. The lowest weight of 3rd instar, 4th instar, 5th instar larva, pre pupa and pupa was found larva reared on F4P21 (0.83 gms), NRC-138 (1.04 gms), PS1569 (1.08 gms), RVSM 2012-4 (0.52 gms) and CAT2503 (0.66 gms), respectively. The lowest Approximate Digestibility (AD), Efficiency of Conversion Digested Food (ECD), Efficiency of Conversion Digested Food (ECI) and Weight gain (Wg) by larva was found lowest in larva reared on CAT488 (56.60%), F4P21 (18.30%), CAT349 (24.25%) and F3P18(0.72 gm), respectively.
Isolation, Identification and Molecular Characterization of Fungal Leaf Spot Pathogens of Strawberry (Fragaria x ananassa Duch.) in Meghalaya (India)
Strawberry (Fragaria x ananassa Duch.) is an important table fruit of millions of people around the world for its nutrient content and pleasant flavour. The fruits are rich in ascorbic acid, secondary metabolites and simple sugars. It is grown extensively under temperate, sub-tropical and tropical climate throughout the year. During the cultivation practices of strawberry, the leaf spots are the major emerging diseases and the deleterious fungal pathogens found to attack the strawberry crop which affects the production and productivity. An extensive survey was conducted in three major strawberry growing districts of Meghalaya (India) during 2021-22. Leaf spot diseases were observed with a disease incidence of 16.29 to 46.66 % of Pestalotiopsis leaf spot and 11.11- 36.10 % of Alternaria leaf spot. A total of 22 isolates of Pestalotiopsis and 10 isolates of Alternaria obtained from different surveyed locations were isolated on the PDA medium. The microscopic observations of Pestalotiopsis showed fusiform conidia comprised of 5 cells with a dimension of 17.35-31.99 µm length and 4.88- 11.28 µm breadth. In similar way, Alternaria showed muriform conidia with a dimension of 13.75-25.13 µm length and 6.96-13.75 µm breadth with vertical and horizontal septations. Based on the cultural, morphological characters and molecular characterization, the pathogens were identified as Neopestalotiopsis clavispora and Alternaria alternata. The DNA sequences were submitted to NCBI portal and got the accession numbers for both the pathogens (OR539470 and OR540826). Pathogenicity tests conducted by inoculation with a conidial suspension of pathogens, produced typical leaf spot symptoms and the re-isolation of pathogens confirmed the Koch’s postulates. The documentation study of disease incidence and severity among different surveyed fields showed an importance of the pathogens and the yield losses caused by these pathogens. Hence an immediate research work has to be undertaken for the development of effective disease management strategies for improving the production and productivity of strawberry.