the aim of this study is to develop a model to provide projections of supply of major crops in target year 2025 in iran. to this end, a model was constructed using positive mathematical programming (pmp) approach. the model takes into account production factors constraints in different provinces in the base year as well as in the target year, and provides forecasts of potential supply of major ...

The biological control potential of parasitic wasps in the field is expected to increase with the provisioning of sugar sources, which increase longevity and replenish carbohydrate reserves. Apanteles aristoteliae is an important parasitoid of Argyrotaenia franciscana, the orange tortrix, an economic pest in fruit crops. In the present study, the effect of sugar diet on the physiological status...

Plasmodiophora brassicae is a soil borne pathogen and the causal agent of clubroot, a devastating disease of Brassica crops. The pathogen lives inside roots, and hijacks nutrients from the host plants. It is suggested that clubroot galls created an additional nutrient sink in infected roots. However, the molecular mechanism underlying P. brassicae infection and sugar transport is unclear. Here,...

water and soil salinity in some regions of isfahan, east azerbaijan, and west azerbaijan provinces and also other parts of the iran are the main hindrance for crop planting. seeds of the tolerant crops to salinity such as cotton and sugar beet may have optimal germination and give acceptable performance if they become far from salt accumulation areas. to evaluate the effects of different planti...

The nectar provision hypothesis predicts that the introduction of nectar-producing plants in agroecosystems benefits parasitoid populations field and enhances biological control. Intercropping is a common crop diversification scheme may bring complementary sources for parasitoids increase herbivore pest For instance, intercropping cereals with faba beans introduces usually sugar-devoid systems ...

Soybean is one of most important oil crops and a significant increase in lipid content in soybean seeds would facilitate vegetable oil production in the world. Although the pathways for lipid biosynthesis in higher plants have been uncovered, our understanding of regulatory mechanism controlling lipid accumulation is still limited. In this study, we identified 87 transcription factor genes with...

BACKGROUND Ensiling is a common method of preserving energy crops for anaerobic digestion, and many scientific studies report that ensiling increases the methane yield. In this study, the ensiling process and the methane yields before and after ensiling were studied for four crop materials. RESULTS The changes in wet weight and total solids (TS) during ensiling were small and the loss of ener...

Sweet sorghum has become a promising alternative feedstock for biofuel production because it can be grown under reduced inputs, responds to stress more efficiently than traditional crops, and has large biomass production potential. A three-year field study was conducted to evaluate three cultivars of sweet sorghum as bioenergy crops in the Southeast United States (Fort Valley, Georgia): Dale, M...

Gurdaspur borer causes great losses to sugarcane especially ratoon crop. On one way it damages the crop and on the other way its infestations paves way for certain diseases like red rot, stem rot and ratoon stunting disease. Experiments were conducted at Sugar Crops Research Institute, Mardan during 2003-2004 in sugarcane ratoon crops with the objective to see the effect of different control me...