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Similar to cardamom mosaic disease or katte disease (20)
cardamom mosaic disease or katte disease
- 1. CARDAMOM MOSAIC,MARBLE OR KATTE DISEASE
- 2. • Disease(viral)commonly seen in katte in NORTH KANARA • Most devastating disease in South India • Mainly found in cardamom,cause an extensive damage on crop yield loss • CAUSATIVE ORGANISM:CARDAMOM MOSAIC VIRUS
- 3. SYMPTOMS • Seen at any stages of the growth • First observed in young leaves of cardmon which shows a general chlorosis of the entire blade with slender, interrupted,parllel streaks of a pale green tissues running along with veins from midrib to the margin
- 4. • As a result of charecterstic symptoms,the disease plants can be easily recognized even from the distance owing to their pale appearance • No symptoms are observed in flowers.pseudostems become stunded and leaves are redused in size
- 5. • The rhizomes gradually shrivel and the entire clump dies eventually • They may be die before the time of bearing flowers and fruits
- 6. TRANSMISSION • Transmited through infected clones by several causitive species such as aphis nerii macrosiphum sonchi and aphis gossipiii which belonngs to class aphids that are present in the field
- 7. MANAGEMENT • CULTURAL CONTROL • Cultural control is a part of sustainable agricultural systems to achieve high crop yeild and is important tool to minimize the disease loss in many crops • They are: • FIELD SANITATION AND DESTRUCTION OF WEED HOST
- 8. • CROP ROTATION • TILLAGE • TRAP CROP
- 9. PREVENTION • Chemical control • Preventive or remedial operations which depends upon their effectivness upon the chemical action or chemical properties of their substance used • Insecticides: as stomach poison borax,thallum, phosphorus, Mercury,fixed nicotine's • Contact poisons:oil emulsions,pyrethrums,benzene hexa chloride and organic phosphates • Fumigants:chemicals like hydrogen cyanide ,carbon bisulfide,sulphar dioxide,para dichloro benzene
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