There are currently no thresholds for Gray leaf spot although some researchers have developed general estimates of the disease on corn yield (Table 1). Table 1.

A typical gray leaf spot lesion can produce up to 5,000 conidia per square millimeter of leaf tissue. Consequently, the more leaf area affected and the larger ... Yield Impacts · Disease Symptoms · Infection Cycle

21 июл. 2009 г. · Gray leaf spot (GLS) has reached threshold levels in some corn fields in southwestern Iowa and a fungicide application should be considered for these fields.

There is good evidence that as a group, shorter maturity corn hybrids (95 to 105 days) will develop higher levels of gray leaf spot than will fuller season ...

Another threshold considers fungicide application when 50 percent of the plants have GLS lesions 3/8 inches or longer on the third leaf below the ear by ...

Gray leaf spot (GLS) has the potential to limit corn yields if severity is high around the tasseling to silking stage. Warmer temperatures and rains we have ...

Gray leaf spot on corn, caused by the fungus Cercospora zeae-maydis, is a peren- nial and economically damaging disease in the United States.

The threshold is when at least 50 percent of plants sampled before tasseling show lesions from the disease on or above the third leaf beneath the ear leaf.

Gray leaf spot is favored by high relative humidity and prolonged leaf wetness, but can be managed with corn product selection, fungicides, residue management, ...

11 июл. 2023 г. · Gray leaf spot (GLS) is caused by the fungus Cercospora zeae-maydis. GLS can occur in corn almost every growing season. Не найдено: threshold | Нужно включить: threshold