Study Material For Agriculture and allied Sectors

Plant Pathology  or  phytopathology  is  a  branch  of  agricultural,  botanical  or biological  science  which  deals  with cause,  etiology,  losses  and  control  of plant diseases.  Disease  is  a  malfunctioning  process  caused  by  continuous  irritation.  A plant  is  said  to  be  diseased  when  one  or  more  of  its  functions  are  interfered  by pathogen.  The  pathogen  is  any  agent  that  causes  pathos  (ailment / suffering)  or damage.  It  include  all  living  organisms  associated  with  causation  of  diseases, viruses  as  well  as  abiotic  agents  such  as  adverse  atmospheric...

INFLORESCENCE 1. Racemose : Inflorescence with monopodoal branching i.e., the inflorescence axis continues to grow and gives off lateral and axillary flowers. (i) Raceme: Racemose inflorescence having a common axis and stalked flowers arranged in acropetal succession, e.g., Brassica. (ii) Panicle: Axis of raceme is branched. (iii) Spike: Inflorescence is similar to raceme but the flowers are sessile: e.g., Achyranthes aspera. (iv) Spikelet: Very small spike of a compound spike forming a unit; e.g., grasses. (v) Catkin (or Ament) : A pendulous spike or spike-like inflorescence consisting of small unisexual flowers ; e.g., Morus alba. (vi) Spadix : A spike with thick and fleshy axis covered by a large spathe ; e.g., Maize. (vii) Corymb : It is a modified raceme with relatively a short main axis, in which the lower flowers have much elongated pedicels so that the flowers come to the same level ; e.g., Candytuft. (viii) Umbel : It is a modified raceme, in which the flowers have ...