This article is about an area of Mexico City, for other uses read Polanco (disambiguation). Polanco is an upscale area in the Miguel Hidalgo borough of Mexico City, located north of Chapultepec Park and consisting of five official neighborhoods ( colonias ).olanco is served by the Polanco and Auditorio stations of the Mexico City metro (subway). Peseros (minibuses), city buses and trolleybuses ply numerous streets in Polanco continuing to and from other parts of the city.
Bean Root Rots. Many fungi, including Rhizoctonia solani, Pythium species and Fusarium solani, form species phaseoli, live in the soil and will infect young seedlings or the seeds of bean plants. Seedlings fail to emerge after planting when the seeds rot in the soil or young seedlings may be stunted.
At the time of pod fill, nodules on annual legumes generally lose their ability to fix nitrogen because the plant feeds the developing seed rather than the nodule. Beans will generally have fewer than 100 nodules per plant, soybeans will have several hundred per plant, and peanuts may have 1,000 or more nodules on a well-developed plant. Figure 2.