To cure the rotting problem, use leaves of neem (Azadirachta indica), which are crushed and five litres of extract is obtained. In the extract, 250 g of castor oil (Ricinus communis) is added and mix the mixture properly. In this mixture, 20 L of water is added. The mixture is applied at the rate of 50 ml in the root zone of the elephant foot (Amorphophallus campanulatus) and turmeric (Curcuma longa) crop respectively. The treatment cures the rotting problem in the crops.The initial symptoms of this disease is observed in the trunk and then on the entire plant. Due to disease, the growth of the plant is obstructed. The disease affects the root of the plant as a result, the production decreases. The disease occurs mostly in the monsoon season. Due to excess moisture the disease prevails in the crop..The practice has been in use from last 4 to 5 years.
Crop: Elephant Foot and Turmeric
Crop Family: Araceae and Zingiberaceae
Crop Scientific Name: (Amorphophallus campanulatus), (Curcuma longa)
Crop Vernacular Name: Elephant Foot Yam, Elephant Yam, Telingo Potato, Sweet Yam, Corpse Flower and Haldi, Manjal, Haldar
Formulation: 250 g of castor oil, Neem leaves,20 Liter of water
Ingredients: leaves of neem (Azadirachta indica), turmeric (Curcuma longa), water
"In antifungal activity assay, the extracts of Ficus racemosa, Moringa oleifera, Azadirachta indica, Cassia alata, Senegalia catechu etc. displayed promising antifungal activities against both of the isolate A and B. The outcome of this research work would be helpful for detection and developing nature-friendly control approach of the two devastating diseases of bitter gourd."
https://www.researchgate.net/profile/Md_Hasan151/publication/330423175_Characterization_of_fungal_pathogens_causing_diseases_in_bitter_gourd_and_establishment_of_their_eco-friendly_control_measure/links/5c49434d299bf12be3df2643/Characterization-of-fungal-pathogens-causing-diseases-in-bitter-gourd-and-establishment-of-their-eco-friendly-control-measure.pdf
"Biological effects of neem on the pupation of Henosepilachna vigintioctopunctata Fab. On bittergourd"
https://www.entomoljournal.com/archives/2015/vol3issue1/PartB/7.pdf