Plants that are infected must be destroyed as the disease can be transmitted from plant to plant by contaminated sap. Symptoms include dark green ink bleed marks in the veins of yellow-colored leaves, and/or tissue collapse between veins.
Exposure to EMF and cancer. Magnetic fields are classified by the International Agency for Research on Cancer (IARC) as a possible cause of cancer, particularly for childhood leukemia. However, experts agree that there may be other explanations for the potential link between exposure to EMF and childhood leukemia. Until scientific evidence can clarify the link between exposure to magnetic fields from high-voltage power lines and cancer risk, you may not want your children to play directly beneath them for long periods of time.
Studies using magnetic field strength as an exposure measure have found that exposures greater than the range of 0.3 to 0.4 ÂµT lead to a doubling risk of leukemia, with very little risk below this level. This exposure range is approximately equal to a distance of 60 m within a high-voltage power line of 500 kV.