Fertigation effects on elephant foot yam (Amorphophallus paeoniifolius) + greengram (Vigna radiata) intercropping system

Abstract

An investigation was carried out during 2013–14 at the research farm of ICAR-Central Tuber Crops Research Institute, Dumuduma, Bhubaneswar, Odisha to study the effects of fertigation on elephant foot yam [Amorphophallus paeoniifolius (Dennst.) Nicolson]+greengram (Vigna radiata L.) intercropping system. The result revealed that the number of pods/plant, seed and haulm yield of greengram were greater in fertigation treatments than soil application. However, greengram responded to fertigation up to N-K2O @80–80 kg/ha. The elephant foot yam corm yield increased with fertigation up to N-K2O @140–140 kg/ha. The corm yield of elephant foot yam and corm equivalent yield of elephant foot yam+greengram intercropping system with fertigation of N-K2O @100–100 kg/ha was comparable with N-K2O @140–140 kg/ha. The fertigation of N-K2O @100–100 kg/ha resulted in increase of 20.1–22.4% corm yield, 19.8–22.3% corm equivalent yield and 19.9–24.4% nutrient use efficiency over soil application of the same quantity of nutrients. The fertigation of elephant foot yam+greengram intercropping system with N-K2O @100–100 kg/ha also resulted in 26.7–28.7% greater net return and higher benefit: cost ratio over soil application of the same quantity of nutrients. The study indicated that fertigation of N-K2O @100–100 kg/ha was sufficient for obtaining optimum yield, returns and nutrient use efficiency in elephant foot yam+greengram intercropping system.

Neck Rot Disease Caused by Athelia rolfsii, the Main Disease in Seedling of Elephant Foot Yam in Bali

“…The symptom of the disease is shown as brownish lesions on the neck of the plant at the soil surface, and finally the plants were died as shown in Figure 1a. This symptom is similar to symptom of neck rot described by Jata et al, 2009. A fungus was isolated from the diseased plants and after passing the Postulate Koch procedure, the isolate Pr1 was proven to be the caused of the disease.…”

“…As the disease has economic importance, the control measures shliould be developed to produce healthy seedlings for transplanting of elephant foot yam. Ways to control this disease include planting truly healthy seeds, removing infected plants, improving drainage, using a botanical fungicide with neem leaf extract, or spraying with 0.2% Mancozeb fungicide (Jata et al, 2009). Gogoi et al (2002) reported that a combination of tuber and soil treatment with Trichoderma harzianum reduced the incidence of Sclerotium rolfsii neck rot disease to 12.9%, followed by tuber and soil treatment with the fungicide Captan (0.2%) which was recorded at 14.8%, compared to 83, 3% in controls.…”

“…Symptoms of this disease are first characterized by brownish lesions on the neck which then spread to the entire pseudostem. At a heavy level of infection, the plant eventually dies (Jata et al, 2009).…”

The ecology of suweg (Amorphophallus paeoniifolius) in the Citanduy and Cimanuk Watersheds, West Java, Indonesia

“…Those plants referred to Imperata cylindrica (L.) Raeusch., Caesalpinia sappan L., Costus spiralis (Jacq.) Roscoe, Ficus montana Burm.f., and Paspalum conjugatum P.J.Bergius (Hidayat 2019), Psidium guajava L. (Chandra 2014), Phylanthus emblica (Singh and Singh 2015), Vigna radiata L. (Jata et al 2019), Colocasia esculenta, Curcuma longa (Kumar et al 2014), Ageratum conizoides L., Mimosa pudica, Cyperus rotundus L., Zingiber officinale Rosc., Curcuma domestica Val., Psidium guajava L., Musa paradisiaca L., Albizzia chinensis (Osb), and Tectona grandis L.f. (Mutaqin et al 2021).…”