Muthuvel Iyyamperumal

• Doctor of Philosophy
• Professor (Associate) at Tamil Nadu Agricultural University

The present study was conducted in Jain Irrigation System LTD from 2023 to 2024 to find the flower bud differentiation (FBD) process in ultra-high-density planting (UHDP) systems for off-season mango production using cv: Ratna and Bangalora and the associated morphological and biochemical changes under specific agro-climatic conditions. Observation...

Papaya (Carica papaya L.) is a nutritionally rich and economically significant tropical fruit crop. Despite its importance, papaya cultivation faces challenges such as dioecy, inconsistent seed propagation and environmental influence on sex expression. Grafting has emerged as a viable vegetative propagation technique to overcome these constraints,...

Terroir represents the interplay of environmental factors that govern the phenotypic and chemical attributes of grape wines. This review elucidates the influence of climatic conditions, soil characteristics, and topographical features on the chemical composition of wines, emphasizing volatile compounds, phenolic compounds, and organic acids. Climat...

Bananas have different ploidy levels, including diploid, triploid and tetraploid, while triploids are most widely used in breeding programs. Although diploid and tetraploid plants have the potential to improve yield and other agronomic traits, they remain underutilized in crop improvement. This study uses multivariate analysis to evaluate the morph...

Mango (Mangifera indica L.) is a globally significant tropical fruit, with India being the largest producer. Despite its economic importance, off-season mango production remains challenging due to the critical role of environmental factors on floral induction. This study investigates the thermal influence on floral initiation in two mango cultivars...

Banana (Musa spp.) is a major staple fruit and cash crop globally cultivated, particularly in tropical and subtropical countries. It exhibits a complex inflorescence, which plays a vital role in its reproductive process. The inflorescence of bananas by distinct morphological and anatomical features that vary among different species and cultivars. T...

Karonda (Carissa carandas L.) fruits hold significant importance in traditional medicine due to its rich composition of "bioactive compounds" including anthocyanin, quercetin and tannins. It is abundant in antioxidants such as vitamin C, flavonoids and phenolic compounds and boasts anti-diabetic, hepato-protective and immune-boosting properties. Th...

The study aimed to evaluate the performance of different rootstocks for acid lime (Citrus aurantiifolia) under salinity and nematode stress, focusing on their impact on plant growth and biochemical parameters. Grafted combinations involving acid lime (PKM 1) scions with rangpur lime and wood apple rootstocks were tested for salinity tolerance and r...

Climate resilience plays a critical role in determining the fruitfulness and yield of grapes, one of the most significant fruit crops globally. This review explores the multifaceted impacts of climatic variability on grape productivity, focusing on factors such as temperature fluctuations, rainfall patterns, humidity, and extreme weather events. Gr...

The study was conducted during 2023-2024 under the Department of Fruit Science, Horticultural College and Research Institute, Tamil Nadu Agricultural University, Coimbatore. The objective of the study was to find out the best technology for the Fusarium wilt management in the banana cultivar Rasthali under pot culture experiment. The experiment was...

Radioactive tracer technology has emerged as a groundbreaking tool for advancing agricultural optimization, particularly in the study of physiological and biochemical processes in fruit crops. By utilizing isotopic tracers, researchers can achieve unparalleled precision in tracing nutrient pathways, imaging biological processes, and diagnosing mole...

Drying is one of the oldest methods for preserving perishable foods, and protecting fruits from microbial degradation, thereby extending shelf life. However, the bland taste and hard texture affect the marketability. This has led to the development of novel drying technologies in which, freeze-drying is one such non-thermal dehydration technique th...

The present study aimed to standardize soilless media mixtures for papaya propagation, focusing on stability, sustainability and environmental impact. A trial was conducted in the winter and summer seasons during 2023-2024 at TNAU, Coimbatore, to evaluate the properties of cocopeat mixtures and optimize the cocopeat media mixture for papaya seedlin...

This study evaluates the effectiveness of various pre-harvest fruit baggingmaterials on the quality and development of the Banganapalli mango cultivar.The bagging materials tested included red/black double-layered bags,brown/black double-layered bags, single-layered brown paper bags, singlelayeredwhite paper bags, butter paper bags, agro-plastic sl...

An experiment was conducted to evaluate 25 different brinjal genotypes for growth and yield-contributing traits. Variability analysis, association studies and Principal Component Analysis (PCA) were performed to explore the relationships among traits and identify significant factors influencing performance. In the present study, high genotypic and...

Bael is the prevalent moniker for the genus Aegle. It is a reference name for Aegle marmelos: a member of Rutaceae family. Bael contains phytochemicals such as alkaloids, tannins, essential oils, gums, resins, coumarin, and polysaccharides that make it effective for a variety of diseases. Bael has a rich history deeply intertwined with various cult...

Fruit ripening is a complex biological process regulated by various endogenous and exogenous factors, with ethylene playing a pivotal role as a gaseous hormone. Traditionally, ethylene for commercial use has been derived from environmentally hazardous processes. However, the discovery of ethylene-producing bacteria presents a sustainable alternativ...

Hot water treatment has lowered the disease incidence in Rasthali banana. Among the different temperature levels, treatment level at 54oC recorded the longest green life (18.80 days) and the shortest in the fruits in control (15.50 days) when packed in 200 gauge polyethylene bag

Background: Cookies is one of the popular snacks preferred by all age group of people. Generally, cookies are made with refined wheat flour, sugar and fat which contain more of high calories and low dietary fibre leading to increased obesity rate. The consumers’ demand towards the nutritional needs in the desired food form can be satisfied with the...

Ornamental bananas (OBs) are known for their bright colour, bract, and attractive foliage with significant ornamental value. The OBs are tolerant to abiotic (cold and drought) and biotic stresses (pests and diseases), having immense scope for studying their breeding potential and the development of two hybrids from the cross of Karpooravalli (ABB)...

The tea mosquito bug (TMB), Helopeltis antonii, is an emerging pest of horticultural crops, specially on guava and moringa. Insecticides are indispensable component for the management of insect pests. Exploration of new molecules with shortest waiting period may pave way for managing TMB in fruit and vegetable crops with nil/low residue. Until now...

Stomata are probably a viable taxonomy distinguishing feature. The study of stomata characteristics of synthetic banana hybrids and their parentage has been carried out. Ploidy determination is essential in banana breeding programs to understand the genetic makeup of hybrid plants. The purpose of this study was to determine the ploidy level of hybr...

Aim: The aim of the present study was to investigate the effect of different pre-sowing treatments on germination characteristics of strawberry guava (Psidium cattleainum Sabine). Study Design: The experiment consisted of eleven treatments and three replications laid out in a Completely randomized design (CRD). Place and Duration of Study: The stud...

Papaya is an important tropical fruit crop mainly cultivated for fresh fruit as well as papain production. Papaya ring spot virus (PRSV) is a major threat to papaya cultivation which results in severe yield loss. A field experiment was carried out to study the efficacy of a nutrient formulation on the growth attributes and PRSV incidence in commerc...

The present experiment was conducted to study the effect of preharvest fruit bagging on the physical parameters and shelf life of mango cv. Alphonso during 2023. Mango fruits were bagged 35 days after the fruit set with various types of bags viz: T1: Brown paper bag; T2: Double layered bag; T3: Transparent bag; T4: Non-woven bag; T5: Butter paper b...

Rapid and precise identification of three sex types (male, hermaphrodite and female flowers) is the key in achieving good returns in papaya (Carica papaya L.) cultivation. This study presents a simple, reliable, fast and cost-efficient DNA isolation protocol and a rapid and precise method of sex determination in papaya. Three DNA isolation protocol...

Aim: Mango (Mangifera indica L.) is the second most consumed fruit which belongs to the family Anacardiaceae. Ripening in mango (climacteric fruit) is hastened by application of ethrel. The experiment was conducted to study the effect of different temperatures during ethrel treatment on shelf life and quality of mango cv. Alphonso. Study Design: Th...

Aims: To study the effect of nutrients and plant growth regulators through foliar spray on yield and quality characteristics of guava var. Arka Kiran. Study design: Randomized Block Design (RBD). Place and Duration of Study: The experimental trial was conducted at a Farmer’s field in Theethipalayam village of Coimbatore district, Tamil Nadu during...

An experiment was conducted at Coimbatore to study the effect of biofertilizers on the bunch and berry attributes of grapes. The biofertilizers viz., Azotobacter, phosphate solubilizing bacteria (PSB) and potash releasing bacteria (KRB) were applied to the individual vines at three different doses of 100 g, 200 g and 300 g each along with 75% and 1...

The Western Ghats regions of India a rich diversity of underutilized fruits, plays an important role in people's livelihoods and provides for a broad range of livelihood support including household income, food, employment, traditional medicine, timber and livestock fodder and also plays a role in the stability of ecosystems. Many of these species,...

Manilkara zapota (L.) P. Royen, a widely adaptable and popular tree meant for its appetizing fruits in tropics with no genomic resources like microsatellite markers. In order to develop genomic markers primarily for sapota, we sequenced partial genomic DNA using next generation sequencing technology on the Illumina HiSeq 2500 platform. We analyzed...

Manilkara zapota (L.) P. Royen , commonly known as sapota, a widely adaptable and popular evergreen tree meant for its appetizing fruits in tropics, but lacks genomic resources such as microsatellite markers. To develop the genomic markers for M. zapota , we sequenced the partial genomic DNA using next-generation sequencing technology on the Illumi...

Agriculture is the mainstay of the Indian economy, contributing over 17 per cent to the total GDP and Creating employment to over 60 per cent of the population. A study was conducted on technological gap in adoption of IPM pest management practices in Kodaikanal taluk of Dindigul district in Tamil Nadu with 60 respondents from Vadakavunji and Senba...

Postharvest dipping of fruits in hexanal formulation extends the shelf life by inhibiting enzyme phospholipase D (PLD) activity. To enhance the postharvest shelf-life and quality of different banana cultivars viz., Grand Naine (AAA), Ney Poovan (AB), Poovan (AAB) and Rasthali (AAB) were treated with different concentration of hexanal formulations (...

India is vulnerable to several environmental threats. An ever growing population is over straining the natural resources and put the natural environment under severe threat. Tribes are the first victims of environmental degradation and disproportionately affect their life because those issues pollute the most essential resources they depend on. Hen...

Root knot nematode Meloidogyne enterolobii cause considerable yield losses in guava. It is now an emerging menace in guava production. Many authors reported the resistant nature of Psidium cattleianum against M. enterolobii. P. cattleianum is a small tree or shrub with a smooth bark and leaves are obovate elliptic and glabrous. Fruits are round, ha...

laboratory study was undertaken to determine the effects of a nano-emulsion carrying hexanal, an enhanced freshness formulation (EFF), as a post-harvest dip technology to minimize the post-harvest losses and to extend the shelf life of bananas. The banana fruits were harvested at three maturities (95%, 85%, and 75%), dipped or not dipped in the EFF...

The periodical changes occurred at tissue level in fruit pulp and peel of banana cv. Grand Naine belongs to AAA genome was studied during storage period. In banana, structural modification in cell walls became apparent at advanced stages of ripening and showed predominantly dissolution of the middle lamella and gradual degradation of starch granule...

Grape is one of the commercially important fruit crop cultivated in the country under wide range of soil and climatic conditions. In India, it is cultivated in an area of 1.18 lakh ha with annual production of 25.85 lakh MT. Tamil Nadu (1.8 %) ranks third with a production of 0.47 lakh MT over an area of 2,800 ha after Maharashtra and Karnataka. Th...

An experiment was conducted at Horticultural College & Research Institute, Tamil. Nadu Agricultural University, Coimbatore to standardise the hydrophylic polymers on growth and yield of tomato. Three commercially available polymers viz. TerraCotten (TerraCottem International. Belgium). Polyvinyl alcohol (Aquatrols corp. of America, USA) and Polyacr...

A study was conducted at Horticultural College and Research Institute, Coimbatore to find out the response of multiplier onion Gnanamedu local, a seedling type in respect of plant height, number of leaves and number of shoots. The experiment was laid out with 30 treatments and three replications in a split plot design. The main and sub plot treatme...