TNAU Agritech Portal
Home | About Us | Success Stories | Farmers Association | Farmers' Innovation | Publications | Contact

Horticultural crops :: Plantation :: Rubber

Abnormal leaf fall: Phytophthora palmivora& P. nicotianae var. parasitica
Symptoms:
  • It occurs during June – August, while general leaf fall occurs during December.
  • On leaves dull grey, circular spots appear which enlarge and become irregular.
  • The  petiole exhibit sunken spot. Affected fruits rot. Leaves shed prematurely either green or after turning coppery red.
  • The affected leaf form a thick carpet of rotting foliage which emits bad smell.

Management:

  • Prophylactic sprays prior to onset of south west monsoon with Bordeaux mixture 1%. Addition of ZnSo4 @ 0.2% improves the efficacy.

Image source

http://www.vietmarubber.info/web/assets/images/runglamuamua.jpg, http://rubberdisease.blogspot.in/

 

Abnormal leaf fall Fruit rot

Home | About Us | Success Stories | Farmers Association | Farmers' Innovation | Publications | Contact Us

© 2015 TNAU. All Rights Reserved.