29
Aug
Control Of Maize Rust. Common rust is most conspicuous when plants approach tasseling. Although the initial appearance is usually in early June in 1974 it did not appear until mid-August. Seed treatment with Metalaxyl at 4 gkg and foliar spray of Mancozeb 25 gl or Metalaxyl MZ at 2gl is recommended. Sorghi are available in maize.
This rust fungus appears in maize crops during summer but the time of the initial appearance has not been consistent over the years. Prune coffee plants properly. Pruning improves air circulation and promotes rapid drying of the foliage. Plant maize during the drier times of the year. Management Strategies The use of resistant hybrids is the primary management strategy for the control of common rust. Planting early can avoid periods of heavy disease pressure later in the season.
Chemical control In the absence of host resistance fungicides can be used to control Polysora rust in seasons where disease severity is expected to be high.
Pruning improves air circulation and promotes rapid drying of the foliage. Although the initial appearance is usually in early June in 1974 it did not appear until mid-August. Several hypotheses can be put forward to explain the appearance of rust diseases in cereals viz. This type is often referred to as partial resistance but has also been called general slow-rusting and rate-reducing resistance. Systemic and contact mode of action. Control weeds to facilitate air circulation and rapid drying of the plants canopy.