Portal, a miticide/insecticide from Nichino America, is now registered for use in citrus, apples, and pecans, officials at the company have announced.
The product is registered in all states east of the Mississippi River for control of mites, leafhoppers, mealybugs, and psylla.
Crops that are registered for Portal include citrus, apples, and pecans, said Mike Ames, general manager of marketing and sales for Nichino America.
Portal is expected to be especially useful against European red mite and two-spotted spider mites, two major pests on apples in the Midwest and Northeast.
In Florida, Portal has demonstrated very good control of citrus rust mite and can also be used for control of Asian citrus psyllid.
Portal also is registered for pecans to control pecan leaf scorch mite in Georgia, said Ames.
“Mites are an economic pest throughout the country, and Portal will be a useful tool in controlling mites and will provide another option for growers in a rotational pest control program,” said Ames.
“Resistance management experts say that rotating between chemistries is the single-most-effective method of avoiding resistance to insecticides,” explained Ames.
“Portal has good efficacy against the insects it's labeled for, and growers are always looking for another tool in their arsenal.”
The miticide also fits the profile for integrated pest management systems, said Ames.
“Besides its usefulness in avoiding resistance, Portal allows growers to scout for mites before treating, it is less harmful to beneficial insects than some other miticides, and it is practically non-toxic to bees,” said Ames. “Those are all important IPM principles.”
Portal is a 5 percent emulsifiable concentrate with 0.4 pound of fenpyroximate per gallon. It is a contact material, and it has a 14-day pre-harvest interval and an application rate of 2 pints per acre in 100 to 400 gallons of water per acre to control most mite species or 4 pints per acre for citrus rust mites, said Ames.
The miticide stops mites from feeding immediately after application and also stops mites from laying additional eggs. Mortality occurs within three to seven days, said Ames.
In Georgia, pecan leaf scorch mites damage pecan trees by feeding, giving leaves a scorched appearance. Severely injured leaves turn entirely brown and drop.
The mites are tiny and are found early in the season on lower branches. To scout for pecan leaf scorch mite, look on the midribs and veins on the underside of leaves. Mite populations often build as the season progresses, making late-season treatment necessary.
In the Northeast and Midwest, European red mite and two-spotted spider mites are established in just about all deciduous tree fruit areas. Injury is caused by feeding on the leaves of apple trees. Severely damaged leaves can become bronzed. Counts of the two species should be combined in determining whether economic thresholds have been exceeded.
In Florida, Portal can be used to control citrus rust mite and suppress Asian citrus psyllid, said Paul Hudson, region sales manager for Nichino America. Portal is suited for citrus because the product is compatible with oil should growers like to use the product in a summer oil application.
Portal also offers the flexibility of being used in the fall or post-bloom applications, explained Hudson.
Asian citrus psyllid is a new threat to Florida citrus because it is a vector for greening disease.
To scout for citrus rust mite, the University of Florida recommends sampling mature leaves that immediately follow flush leaves. Fruit should also be inspected for the presence of mites.
For information on Portal and other Nichino products, call (888) 740-7700 toll-free or go to www.nichino.net.