Diseases 70

Diseases - 70
	þ SEED TREATMENT IS CHEAP INSURANCE FOR SEEDLING ESTABLISHMENT The fungi causing rice seedling disease and poor stands have been identified. Improved stands resulting from seed treatment create seed savings that alone will payback the entire costs of the 1970-71 rice research program. Seeding rates can be safely reduced to 125 pounds per acre from 150. Many sped-treatment chemicals have been tested. Three proved-best: Captan and Arasan® are now registered and available for use; Difolatan® is not yet registered. The search goes on for even more effective chemicals. In the meantime, Captan and Arasan® should give good stands even when conditions are bad, especially in early plantings. STEM ROT LOSSES ARE BEING ATTACKED BY NEW TECHNIQUES New knowledge is being developed on the stem rot fungus, its life cycle, and factors affecting disease severity. Chemicals and cultural practices for control are being sought. New techniques are being tried toward better evaluation of 5,000 varieties for resistance. In short: Advances are being made on three fronts against this increasing problem. No surefire solution yet, but things are looking up. þ If you have this problem, plowing or discing to completely cover all old rice crop residue is suggested. The rose varieties (Calrose, etc.) seem to have less stem rot resistance than Colusa.

Diseases - 70

þ SEED TREATMENT IS CHEAP INSURANCE FOR SEEDLING ESTABLISHMENT

The fungi causing rice seedling disease and poor stands have been identified. Improved stands resulting from seed treatment create seed savings that alone will payback the entire costs of the 1970-71 rice research program. Seeding rates can be safely reduced to 125 pounds per acre from 150.

Many sped-treatment chemicals have been tested. Three proved-best: Captan and Arasan® are now registered and available for use; Difolatan® is not yet registered. The search goes on for even more effective chemicals. In the meantime, Captan and Arasan® should give good stands even when conditions are bad, especially in early plantings.

STEM ROT LOSSES ARE BEING ATTACKED BY NEW TECHNIQUES

New knowledge is being developed on the stem rot fungus, its life cycle, and factors affecting disease severity. Chemicals and cultural practices for control are being sought. New techniques are being tried toward better evaluation of 5,000 varieties for resistance.

In short: Advances are being made on three fronts against this increasing problem. No surefire solution yet, but things are looking up.

þ If you have this problem, plowing or discing to completely cover all old rice crop residue is suggested. The rose varieties (Calrose, etc.) seem to have less stem rot resistance than Colusa.