Pigeon pea (Cajanus cajan) is a significant leguminous crop that is abundant in several minerals as well as protein and carbohydrate. It is reported that the protein content ranges from 17.9 to 24.3 g/100 g in whole grain samples1.
But unfortunately, pigeon pea is being affected by seed mycoflora badly, which is a main factor destroying seed health. Scientists have found wide variety of fungi in pigeon pea seed. Some of these microbes can be pathogenic; therefore, seed pathology of pigeon pea should be investigated properly. Patil and his team found that seed mycoflora of pigeon pea cause huge decline in seed germination2.
Ghangaokar as well as Kshirsagar3 reported the seed borne fungi linked with different legumes seeds through blotter paper method from untreated and treated seeds. Consequently, the tested seeds were found to have maximum number of seed borne fungi viz., Alternaria alternata, Aspergillus niger, Aspergillus fumigatus, Aspergillus flavus, Rhizopus nigricans, Fusarium oxysporum, Fusarium moniliforme, Fusarium solani, Curvularia lunata, Penicillium citrinum, Macrophomina sp., Monilia sp., Chaetomium sp., Rhizoctonia sp, Trichoderma etc. These fungi can destroy the quality of pigeon pea during storage. Hence, proper management practices should be adopted to defense these seeds to gain a uniform plant stand as well as vital seedlings.
By considering this, Narendra Kumar4 and colleagues designed an experiment to study the seed mycoflora of pigeon pea, biodeterioration because of fungi and in vivo preservative efficacy of essential oil of neem giloy leaf (Tinospora cordifolia) for storage purpose.
In this experiment, scientists examined the fungal attack on stored Pigeon pea seeds by means of agar plate and blotter paper techniques. Then, essential oils were separately extracted from 20 plants of neem giloy. Afterwards, MIC, nature, spectrum, effect of physical factors were decided and in vivo usefulness of T. cordifolia leaf oil was investigated for safe storage of pigeon pea.
The outcomes of this study showed that T. cordifolia leaf essential oil exhibited more toxicity against fungi as compared to other tested synthetic pesticides. Conclusively, this oil has the potential to be used as an agent to protect seeds of pigeon pea during storage.
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17 November, 2019