{Agave sisalana}

Boron Deficiency in Sisal

The first signs of boron deficiency in sisal are yellow spots, most numerous near the tip, on both surfaces of the leaf. These are followed by the formation in the epidermis of ramifying fingerlike depressions from the leaf margin, which may later become suberized.

In sand culture experiments, further symptoms have been seen:

  • The leaf tip may be hooked
  • The leaf spine absent or reduced to a white hair

In cases of severe deficiency, the growing point becomes disorganized and the leaves are short, narrow, twisted, and sometimes split. The plants have a flat-topped appearance.

Boron deficient plants may also be more prone to Fusarium wilt.

Soil Application (Suggested rates of application)

  Granubor Fertibor
LBS/ACRE 3-9 3-9
KG/HA 3.38 - 10.13 3.38 - 10.13

Foliar Application (Suggested rates of application)

KG/HA 2.25 - 6.75
Value in Use
Current Yield (Per Acre)
Expected Sale Price

U.S. Borax, part of Rio Tinto, is a global leader in the supply and science of borates—naturally-occurring minerals containing boron and other elements. We are 1,000 people serving 650 customers with more than 1,800 delivery locations globally. We supply around 30% of the world’s need for refined borates from our world-class mine in Boron, California, about 100 miles northeast of Los Angeles. Learn more about Rio Tinto.

Copyright © 2024 Rio Tinto. All Rights Reserved.