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.
Root rot, damping-off, and seed rots are major diseases of green beans and lima beans in some years and in some soils. These diseases are caused by a complex of soil-borne fungi; they are not seed-borne. These diseases tend to be spotty in fields, and their occurrence is unpredictable.
Root-knot nematode. Root-knot nematodes are plant-parasitic nematodes from the genus Meloidogyne. They exist in soil in areas with hot climates or short winters. About 2000 plants worldwide are susceptible to infection by root-knot nematodes and they cause approximately 5% of global crop loss. Root-knot nematode larvae infect plant roots, causing the development of root-knot galls that drain the plant's photosynthate and nutrients. Infection of young plants may be lethal, while infection of mature plants causes decreased yield.