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Kaiima Bio Agritech, Ltd

Moshav Sharona, Israel 1523200

Tel:  +972-4-953-0148

Fax: +972-4-662-0673

Email: info@kaiima.com

Common Diseases and Pests
 
DISEASES:
Rust (Melampsora ricini):

appears in warm humid conditions on the bottom side of the leaf. Delivered by winds and by humans/animals when moving from infected fields into a healthy field. Reduces leaf area and photosynthesis ability of the plants.

Rust damaged leaf

Rust damaged leaf

Rust damaged leaf

top view

Cercospora (Cercospora ricini):

appears in cold humid conditions. Usually starts on the lower, old leaves and “climbs” upwards. Delivered by winds and by humans/animals when moving from infected field into a healthy field. Reduces leaf area and photosynthesis ability of the plants. Attacks all parts of the plant in advanced stages.

Cercospora damaged leaf

Cercospora damaged leaf

Cercospora damaged leaf

Botrytis (Botrytis ricini):

appears in cool moist conditions. Can be especially damaging since it attacks the racimes and the fruits directly.  Delivered by winds and by humans/ animals when moving from infected field into a healthy field.

mold damaged flowers

mold damaged flowers

mold damaged flowers

Fusarium root rot (Fusarium oxusporum):

caused by a soil borne fungus that blocks the vascular system in the stem. First symptoms are wilting of plants, followed by darkening of the veins & blackening of the root. Avoid growing castor in the same field in the future.

Fusarium induced blackened root

Fusarium induced darkened veins

Wilting plants caused by Fusarium

 
PESTS:
Green Stink Bug (Nezara viridula):  

very common in many countries. Causes direct damage to yield by sucking on green fruits, emptying the immature seeds inside them. In Africa there are more relatives of this bug that causes the same damage.

Egg cluster + 1st instar hatching

5th Instar

Green Stink Bug

Severly damaged castor plant

Green Bug life cycle

Chinch Bugs (various):

small soft bugs, such as cotton bug (Oxycarenus hyalinipennis) that feed by sucking the bases of the flowers, causing them to fall before setting. Because of their small size (5 mm or less) they are very difficult to detect.

Oxycarenus hyalinipenis

(instar (left) and adult)

Nysius cymoides

Campylomma unicolor

Moth Caterpillars:

there are various caterpillars that may attack castor, eating the leaves. Can be especially damaging when the plants are still small with very few leaves or when there is a population explosion.

Moth Caterpillar

Moth Caterpillar

Moth damaged plantlet

Accarins (Spider mites):

May appear in hot & dry conditions on the bottom side of the leaves. In small populations will not cause damage but, if not treated, can cause great damage to the leaves. Usually difficult to detect because they are not seen from above. However. Yellowish spots between the veins can indicate mites on the other side of the leaf.

Accarin damaged leaf

top view

Sever accarins

infestation

Accarin damaged leaf

bottom view

Sever accarins

infestation

Accarin damaged plant general view