{Agave sisalana}

Boron Deficiency in Sisal

The first signs of boron deficiency 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 tip of the leaf may be hooked and 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 be more prone to Fusarium wilt.

Soil Application (Suggested rates of application)

  Granubor 2 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
Application Method
Current Yield (Per Acre)
Expected Sale Price

Rio Tinto Borates is a global leader in the supply and science of borates - naturally-occurring minerals containing boron and other elements. Refined borates are essential nutrients for crops. We are 1,000 people serving 500 customers with over 1,700 delivery locations globally. We supply 30% of the world's need for refined borates from our world-class mine in Boron, California, about 100 miles east of Los Angeles.  Learn more about Rio Tinto

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