Control of alternaria solani simply by herbal

Paper type: Health,

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Disease, Herb

Blight disease is brought on by Alternaria solani belongs to the sub-division Deuteromycotina, school Hyphomycetes, friends and family Dematiaceae. The genus is definitely characterized by the formation of multiform conidia possibly singly or in short or longer stores and supplied with cross, longitudinal as well as oblique septa and having much longer or brief beaks. The conidia will be porospores created from simple, darker, septate conidiophores in basic borne singly.

Among the different disorders caused by the genus Alternaria, blight disease is one of the many dominant one which causes normal yield loss in the array of 32-57%(2). Symptoms of this disease include presence of abnormal, often round brown to dark brown colour leaf locations on the leaves with concentric lines inside the spots. Usually the circular locations coalesce to form large areas resulting in the leaf blight. In several instances, small dark coloured spots are also formed on pods and tender twigs.

For Alternaria blight management, early sowing of correctly stored clean certified seed after deep ploughing along with clean cultivation, on time weeding and maintenance of the best possible plant human population, avoidance of irrigation at flowering and pod development stages are a couple of the steps to be followed to get an efficient management of the disease. Since a number of Alternaria types infect crops of economic importance, we have a strong ought to effectively control for this virus. There are diverse methods which can be there for needed for its control.

The life cycle starts with the fungus over wintering in crop residues or untamed members from the Solanaceae family members. In the springtime, conidia happen to be produced. Multicellular conidia are splashed simply by water or by wind flow onto an uninfected plant. The conidia infect the rose by going into through little wounds, stomata, or direct penetration. Attacks usually start on older leaves close to the surface. The fungus infection takes time to grow and eventually forms a lesion. From this lesion, more conidia are created and produced. These conidia infect other plants or perhaps other parts of the identical plant within the same growing season. Every part of the plant can be afflicted and type lesions.

Alternaria solani infects arises, leaves and fruits of potato (S. tuberosum), tomato (Solanum lycopersicum L. ), eggplant (S. melongena M. ), bell pepper and hot pepper (Capsicum spp. ), and also other members of the Solanum relatives. Distinguishing symptoms of A. solani consist of leaf location and defoliation, which are most pronounced in the lower cover.

There are numerous fungicides on the market for managing early blight. Some of the fungicides on the market happen to be azoxystrobin, pyraclostrobin, chlorothalonil, birdwatcher products, hydrogen dioxide, mancozeb, potassium bicarbonate, and ziram. The most common and effective means for the control over early blight is throughout the application of foliar fungicides. Waterproofing protectant fungicides recommended for later blight control (e. g. maneb, mancozeb, chlorothalonil, and triphenyl tin hydroxide) are effective against early blight.

Alternatively the pesticide treatment can be not guarded as chemical compounds pollute environment, effect well being vulnerability in humans and when these harmful chemicals enter into the food cycle become unsafe to all living entities. Organic derivatives just like phenols, tannins, and bio-flavonoids are ecologically safe and may even be used instead of commercial fungicides for controlling pathogenic fungi.

Vegetation are full of a wide variety of second metabolites including tannin, terpenoids, alkaloids, bio-flavonoids, phenols, steroids glycosides and volatile essential oils etc . These secondary metabolites posses antimicrobial property and play an essential role in defense against attack by insects and herbivores Analysis of anti-bacterial properties of plants recognizes them while but for designing a medicinal formulation from crops.

The world is gradually turning to bioformulations which are known to be effective against a large show of diseases and health conditions. More importantly, they may be not known to cause any kind of notable derogatory effects and are readily available at affordable prices. However , add a note of caution stating that plant remedies work and without side-effects, provided they may be selected correctly and taken under appropriate medical guidance. Various organic and natural substances including cow dung, neem oil cake, mustard oil dessert, coconut olive oil cake and so forth are used simply by farmers as organic manure. Some employees also reported the significant antifungal properties in the organic substances (12). The current work offers to develop a formulation by simply combining plant extracts with these traditionally used organic substances intended for control of early blight of tomato caused by Alternaria solani.

This kind of formulation will give you a cheap and environmentally safe herbal fungicide that can be further more used as a commercial natural bio-control agent. In the recent times, agricultural scenario is witnessing a tendency towards organic farming. It truly is seen that agricultural products produced through organic farming, without using any inorganic fertilisers and insect sprays, fetch high demand and selling price in the international market. Organic and natural farming has its basic in Nature and it makes utilization of only organic materials. Organic and natural farming is usually not for a single crop but it envisages the whole farm. The main objective of organic farming includes mulching, crop rotation, cover cropping green making, animal waste materials, composting, bio-gas slurry, biofertilisers and organic recycling.

The world is gradually embracing bioformulations that happen to be known to be powerful against a big repertoire of diseases and ailments. Most importantly, they are unfamiliar to cause any distinctive derogatory effects and are easily available at affordable prices. Yet , add a note of care stating that plant remedies are effective and without side-effects, offered they are chosen properly and taken underneath proper medical supervision. The active element, most often the second metabolite, varies in quality and quantity for a offered plant kinds growing in different locations. The industry value of such plants depends on their particular active content material rather than only their luxuriant growth. Reckon that near to 70, 1000 species of the rose kingdom had been used because herbal remedies at one time or perhaps other discriminate use of fungicides may lead to dangerous residues, progress fungicide resistance, environmental cession and positivelly dangerous, teratogenic and mutagenic effects in individuals, animals and plants. With this context, biocontrol approaches can help to develop a great eco-friendly control stratagy pertaining to management of serious plant illnesses. Recent research have shown the value of biocontrol agents as is possible non- phytotoxic systematic and easily biodegradable option fungicides.

Folk drugs of almost all civilizations worldwide abound in herbal remedies. Majority of the traditional drugs used in healthcare are obtained from plants. Inspite of several advancements in the field of man made drug hormone balance and antibiotics, plants remain one of the major raw materials for drugs treating various ailments of humans. Scientific and pharmaceutical drug investigations have in fact raised the status of healing plants simply by identifying the role of active principles present in these people and elaborating on their function of action in human being and creature systems. Some workers realized that the neem seed essential oil has more powerful than the powdered formulation in reducing egg-laying and mature emergence of the bruchid. The excessive wrong use of a broad variety of fungicides has led to it staying harmful to environmental surroundings and enhances the resistant pathogen populations. For this reason, alternative techniques to control the condition had been studied with emphasis on biological control using disease or bacterias to reduce fungicide application and minimize cost of creation. Biological control has the probability of manage herb disease which usually occurred through different components such as antibiosis, competition, suppression, direct parasitism, induced level of resistance, hypovirulence and predation.

Hence, there would be no probability of residual degree of toxicity of the essential oil on style of the products. Similarly there are numerous reports which usually showed that herbal products or grow extracts usually do not leave any kind of harmful residue (20), thus the chance of residual degree of toxicity in case of extracts is also extremely less.


Collection and extract preparation of check plants

Leaves of Polyalthia longifolia and lawsonia inermis, fruit pulp of Cassia llaga and seeds of Pongamia pinnata collected from College or university College of Science campus, Udaipur. Accumulated plant parts were disinfected with 0. 1% HgCl2 and eventually washed with distilled drinking water. All plant parts were shade dried out at place temperature and powdered by artificial means. The ground material was that passes sieve Number 240 so as to obtain natural powder of nylon uppers size 62, which was used to prepare get. 100% alcoholic and fifty percent alcoholic raw extracts was prepared in accordance to customized method. Partly purified ingredients in different solvents were made by hot extraction methods.

Test plant and infection: Alternaria solani was separated from attacked fruit of tomato gathered from the local market of udaipur. Identification of fungus infection was done by Dr . Big t. Prameela Devi (Head, Label of Plant Pathology, Indian Type Culture Collection, IARI, New Delhi). Tomato (Raja-1) seed products were collected from community market of Udaipur.

Inoculum development

Potato dextrose agar (PDA) medium that was sterilized within an autoclave for 15 pound-force per square inch (psi) for 20 minutes utilized for culture of Alternaria solani. The inoculated petriplates were incubated at two hundred fifity C intended for seven days. Genuine culture hence obtained utilized for mass culture of Alternaria solani.

Preparation of Herbal Formula

Herbal formulations were prepared by applying all evaluation plant portion extracts elicitor and binder in different rate. 20 general motors elicitors like neem, mustard binders just like cow dung were blended in 95 ml of autoclaved drinking water for 24 h. The mixture was then filtered and utilized for antifungal activity. 100% of neem olive oil cake, completely mustard essential oil cake and 100% of cow dung solutions were mix with elementary extract and partially purified extract. Almost all ingredients of herbal formulation were used in following combinations:

  • Crude extracts: Neem oil cake: cow dung
  • Primitive extracts: Mustard oil wedding cake: cow dung
  • Partially purified extract: Neem oil dessert: cow muck
  • Partially purified extract: Mustard oil pastry: cow muck
  • Antifungal process of herbal preparations

Antifungal activities of those formulations had been done by poison food technique (24) against Alternaria solani. 18 cubic centimeters of molten sterile potato dextrose multimedia were combined with 2 cubic centimeters of formulation (Plant remove: oilcake: cowdung). This blend was put into pre-sterilized petri-plates and allowed to harden at place temperature. Therefore prepared petri plates were inoculated aseptically with six mm compact disk of check cultures. The plates had been then incubated at 282C for 3 days. Antifungal activity was measured being a function of increase in growth of 6 mm disc of inoculums of seven days aged culture in the fungus was aseptically inoculated upside down in the middle of the Petriplate and incubated at 252C. On the 7th day of incubation typical diameter of the fungal groupe was assessed and percentage of mycelia growth inhibition was computed by the next formula provided below.

% Mycelial development inhibition = gc-gt as well as gc× 100


gc = Growth of mycelial colony after incubation period in control set subtracting the diameter of inoculums disc

grand touring = Growth of mycelial colony after incubation period in treatment collection subtracting the diameter of inoculum disc.


Antifungal activity of plant components, oilcake and cow muck were seen in the shown case. The combination of flower extract, oilcake and cow dung by means of Bioformulation revealed great inhibitory activity against A. solani. A. solani is a causal agent of blight disease in tomato and spud crop. Plant life and and so are natural ingredients and organic materials include thousands of matters and are essential sources of new ecofriendly and biologically lively molecules display antimicrobial property. (25) The usage of natural goods for the control of fungal diseases in plants is recognized as as an appealing alternative to man made fungicides due to their less unfavorable impacts around the environment (26). In the present analyze leaf remove of Lawsonia inermis, Polyalthia longifolia fresh fruit pulp remove of Cassia fistula and seed draw out of Pongamia pinnata were prepared and used for develop the Bioformulation with mustard oilcake, neem oilcake extract and cowdung extract. 12 mg/ml concentration of all test plant components were increase 100% of neem oilcake, mustard oilcake and cow dung option. In this series 28 ingredients ratios were prepared and assayed intended for antifungal activity against A. solani. Among 28 formulations, formulation zero 2, sixteen, 20 and 28 showed best inhibitory activity against test pathogen and percent inhibition of these formulations was 82. 85%, 82%, seventy eight. 42 and 80% correspondingly. Extracts by higher plants contain antifungal substances in form of second metabolites, that really help in fighting off the pathogens. The extraction of virtually any plant material with solvent will produce a mixture of chemical substances. The get may contain a wide variety of chemical substances like alkaloids, phenols, tannins, flavonoids, Volatile oils, Saponins and Carbohydrates etc . neem cake and mustard dessert proved excellent and inhibited the growth of pathogens also.

Yet , this is the initially report upon comparative efficacy of different flower exracts along with neem items, mustard products and cow dung used to control the in vitro regarding A. solani. Studies of numerous researchs suggested that neem products like neem leaf powder, neem oil, neem seed powder completely curb the plant pathogenic fungi. (28) but neem oilcake in combination with plant draw out and cow dung is definitely newly reported in this examine. Plant preparations have been employed for centuries in medicine and pest control. Farmers in India work with neem leaves to protect their very own stored feed from pesky insects. Herbs and spices, such as basil and clove, had been used by many personnel to protect food from spoilage, as have antimicrobial property.

The antimicrobial actions of Lawsonia inermis, Polyalthia longifolia, Cassia fistula and Pongamia pinnata plant parts have been researched earlier by many scientists. Tea leaf extract of Lawsonia inermis, Polyalthia longifolia, seed get of Pongamia pinnata and Cassia llaga fruit pulp extract demonstrated antifungal activity against Aspergillus niger, Aspergillus clavatus, Candida albicans. Solarizing soils plus make use of appropriate organic materials are also observed to actuate a series reaction of chemical substance and microbes degradation, which in turn increase toxicity against dirt flora and fauna, especially soil paid for plant pathogens. These quite possibly contributed to the high nutrient contents, which could be available with organic manure amendment.

In present study, we all examined the In vitro activity of organic formulation which contains raw and somewhat purified get of Lawsonia inermis, Polylathia longifolia leaves seed remove of Pongamia pinnata and fruit pulp extract of Cassia úlcera neem essential oil cake, mustard oilcake and cow dung against Alternaria solani.

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