Porang (Amorphophallus muelleri Blume) is a tuber crop native to the tropics that belongs to the Araceae family. Porang is a potential tuber crops that has been known in Indonesia for a long time, but the value of its product has not been widely disclosed. The planting area covers over 45,000 ha with East Java as the main production areaMadiun-East Java has a long and the oldest history of porang cultivation in Indonesia and has great potential for porang development. Characterized and officially released its local cultivar as an official released cultivar would protect the local germplasm and can be used as a basis for character improvement. Porang Madiun 1 cultivar has morphological characteristics of compound leaf type, dark green-green leaf color. The color of the leaf edges is pink, but as the age of the plant increases, the leaf edges turn white. Porang leaf surface smooth-wavy, hairless. The edges of porang leaves are smooth- wavy, depend on sunlight intensity. Stem shape was round, stem color was green with white spots and longitudinal lines, The pattern of spots on the stems has a sparse density, with the color of the stems varying depending on the age of the plant. Shape of bulbil was irregular round with various size. Average corm weight of Madiun 1 was 0.1 kg for first year porang plant, 0.4 kg for second year porang plant, and 1.6 kg for third year it became 1.6 kg with the average number of bulbils 1.8, 4.9, and 16.7, respectively

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Background: The infestation of the pod sucking bug Riptortus linearis is one of the limiting factors of soybean productivity in Indonesia. The research aims were to identify the level of resistance to the pod sucking bug R. linearis on several soybean genotypes based on the no-choice test (NCT) and free-choice tests (FCT). Methods: The genetic materials used were 49 soybean genotypes. The study was conducted in the Indonesian Legumes and Tuber Crops Research Institute (ILETRI) from August to December 2020, using the randomized block design in triplicates. The evaluation for pod sucking bug resistance was based on NCT and FCT. Result: The FCT resulted in two genotypes with a consistent moderately resistance level (20-40% of damage intensity) to pod sucking bug based on the pod and seed damage intensity. The NCT method resulted in five genotypes as moderately resistant (20-40% of damage intensity) to pod sucking bug based on the seed damage. The NCT resulted in higher average intensity of pod and seed damage (80.25% and 71.23%, respectively) than the FCT (69.91% and 69.09%, respectively). Two soybean genotypes (Degra/Anjasmoro-1-559 and Anjasmoro/IAC100-2-618) with a consistent moderately resistance level could be used for cultivar improvement in the breeding program. The pod trichome density was suggested to be one of the effective morphological defenses against the pod sucking bug attack.

Growth and yield of copea can be affected by abiotic stress such as salinity. Aim of this study was to analyze the tollerant level of cowpea againts salinity. The study was conducted in the screenhouse of Iletri at Malang, East Java during the dry season of 2017. This study conduct using factorial completely randomized design with two replications. The first factor was two environments (non salt stress and salt stress with soil electrical conductivity 9.5 dS m -1). The second factor was 125 cowpea genotypes. Data measurement included plant height, number of branches, number of nodes, pod number, pod length, number of seeds per pods, and seed weight. The soil used in the trial was highly saline, and the stress intensity were ranged from 0.25 to 0.88 for all the observed characters. The genotypes responded variedly to salt stress, and there were a very significant effect on all the characters except the number of nodes. Seed yield and pod number per plant experienced the highest stress level with stress intensity above 0.80. Based on seed yield and the tolerance index, six genotypes were tolerant to the high salinity. The six genotypes were MLG 17019, MLG 17055, MLG 17060, MLG 17186, KT 4, and KT 6. Selected genotypes were prospective for development in the improvement of cowpea varieties tolerance to salinity.

Mungbean is an important food crop, it is a source of carbohydrates, protein and B vitamine. Therefore the production must be increased. In increasing the production of mungbean, there are several constrains including disease infection. Leaf spot and powdery mildew are the main diseases on mungbean. Planting the resistant varieties to leaf spot / powdery mildew is an effective, easy, and inexpensive way. The aim of research is to get some resistant mungbean lines against leaf spot and powdery mildew disease. The research was conducted in the greenhouse of the Indonesian Legumes and Tuber Crops Research Institute, from May to September 2019. Evaluation of the resistance of mungbean lines to leaf spot and powdery mildew was carried out consecutively. The material tested was 20 mungbean breeding lines from the breeding section, with one resistant variety and one susceptible variety as a check. Inoculation was done by spraying the suspension of Cercospora cruenta spores of leaf spot, or Erysiphe polygoni spores of powdery mildew, with a density of 104 spores / ml in the afternoon. Observation of the intensity of leaf spot or powdery mildew disease is carried out three times, starting at one week after the first symptoms appeared. The results showed that out of 20 mungbean lines tested, there were no line that were resistant, 7 lines were moderately resistant and 13 lines were moderately susceptible to leaf spot disease. Out of 20 lines of mungbeans tested, 8 lines were resistant and 12 lines were moderately resistant to powdery mildew.