Oireet
Beginning on older leaves, numerous small brown spots give the plant a mottled appearance.
Furthermore, the blotches expand and coalesce to irregularly shapened, light brown necrosis.
Syyt
Potassium deficiency
Large amounts of K are necessary for adequate nutrition of soybeans.
Oireet
Interveinal yellow chlorosis, starting on the older leaf margins. The main veins remain green for some time.
Syyt
Potassium deficiency
Large amounts of K are necessary for adequate nutrition of soybeans.
Oireet
Interveinal yellow chlorosis, starting on the older leaf margins. The main veins remain green for some time.
As the yellowing progresses towards the leaf base, there appear brown marginal necroses.
Syyt
Potassium deficiency
Large amounts of K are necessary for adequate nutrition of soybeans.
Oireet
Interveinal yellow chlorosis, starting on the older leaf margins. The main veins remain green for some time.
As the yellowing progresses towards the leaf base, there appear brown marginal necroses. They may drie off and form a necrotic seam all along the leaf edge.
Syyt
Potassium deficiency
Large amounts of K are necessary for adequate nutrition of soybeans.
Oireet
Interveinal yellow chlorosis, starting on the older leaf margins. The main veins remain green for some time.
As the yellowing progresses towards the leaf base, there appear brown necrotic spots in the marginal area.
Syyt
Potassium deficiency
Large amounts of K are necessary for adequate nutrition of soybeans.
Oireet
Already far advanced chlorosis. The leaf is almost completely bleached, only the midrib and the adjacent area are still green.
As the chlorosis progresses towards the leaf base, there appear brown necrotic spots in the marginal area.
Syyt
Potassium deficiency
Large amounts of K are necessary for adequate nutrition of soybeans.
Oireet
Already far advanced chlorosis. The leaf is almost completely bleached, only the leaf base, the midrib and its adjacent area are still green.
As the chlorosis progresses towards the leaf base, there appear brown necrotic spots in the marginal area.
Leaves are bent down.
Syyt
Potassium deficiency
Large amounts of K are necessary for adequate nutrition of soybeans.
Aasia ja Oseania