Corn
Relative Toxicities of Insecticides and Miticides Used in Corn to Natural Enemies and Honey Bees (1/02) ... [... more]
University of California IPM |
Charcoal Rot
Charcoal rot first becomes noticeable when corn is in the tassel stage or later. Infected stalks become shredded; the pith is completely rotted, leaving stringy vascular strands more or less intact. Small, black, ... [... more]
University of California IPM |
Aphids
Transmission of virus disease is the primary damage caused by aphids and the potential for this varies significantly from year-to-year and area-to-area. Insecticide sprays will not prevent virus transmission, but can ... [... more]
University of California IPM |
Bacterial Soft Rot
The disease is most commonly encountered in sprinkler-irrigated fields or when unseasonal rains occur. The bacteria are probably soilborne, and are carried into the whorl on soil particles. The mode of entry of the ... [... more]
University of California IPM |
Herbicide Treatment Table
COMMENTS: Do not use on corn grown for seed, sweet corn, popcorn, or white corn. Use postemergence as a tank mix with nicosulfuron (Accent), atrazine (AAtrex, etc.), dicamba (Banvel), bromoxynil (Buctril), or 2,4-D ... [... more]
University of California IPM |
Cutworms
Adults are moths approximately 1 inch long with a wing span of 1.25 to 2 inches and vary widely in coloration. Eggs are somewhat flattened on top, white to dull or off-white in color, and ribbed. They are generally ... [... more]
University of California IPM |
Common Rust
Mild temperatures (60° to 73°F) and high relative humidity (near 100%) favor rust development. Initial inoculum is probably windblown spores from subtropical and tropical areas where the pathogen persists on living ... [... more]
University of California IPM |
Cucumber Beetles
The western spotted cucumber beetle and the western striped cucumber beetle occur throughout California. The other two species occur primarily in southern California. Cucumber beetles (also called corn rootworm ... [... more]
University of California IPM |
Seed Rots And Damping-Off
Seeds or seedlings may be predisposed to disease by several factors, including planting depth, soil temperature, soil type, seed quality, and mechanical injury to the seed pericarp. These diseases are more common in ... [... more]
University of California IPM |
Relative Toxicities Of Insecticides And Miticides Used ...
4 Ratings are as follows: 1-Do not apply to blooming plants; 2-Apply in evening after bees have stopped foraging; 3-Apply in late evening after bees have stopped foraging until early morning before they begin to ... [... more]
University of California IPM |
Special Weed Problems
Nicosulfuron (Accent) as a postemergence banded treatment is very effective at controlling johnsongrass up to 1 foot tall and stopping the growth of johnsongrass up to 3 feet. Best corn yields are obtained by early ... [... more]
University of California IPM |
Susceptibility Of Weeds To Herbicide Control
** Only for transgenic varieties of corn that contain specific herbicide-resistant genes. ... [... more]
University of California IPM |
