Pest Of The Month: Broad Mite

Pest Of The Month: Broad Mite

Identification

The broad mite pest attacks terminal leaves and flower buds and causes them to become malformed. Broad mite feeding distorts plant tissue, causing leaves to become hardened, thickened, and narrow, giving them a “strappy” appearance. The blooms abort and plant growth is stunted when heavy pressure is present. Fruits may develop a russeted appearance.

Crops Affected
The broad mite can be a major problem on pepper in Florida.
This species has a worldwide distribution and can affect a
large number of hosts, including vegetables such as basil,
eggplant, green beans, potatoes, and tomatoes, as well as
a variety of fruits and ornamental plants.

Mites are usually seen on the newest leaves and small fruit. Leaves turn downward and turn coppery or purplish. Internodes shorten and the lateral buds break more than normal.

Malformed terminal buds and stunted growth often is a telltale sign that broad mites are present. Broad mites are extremely tiny and are difficult to see without a 10X or stronger hand lens. The mites may crowd into crevices and buds. Mites prefer the shaded side of fruit and the underside of leaves, which usually faces the plant, so scouts must carefully inspect affected plants.

Survival And Spread

The broad mite has four stages in its life cycle: egg, larva, nymph, and adult. Adult females lay about five eggs per day over an eight- to 13-day period and then die. Adult males may live five to nine days.

The eggs are about 0.08 mm long and are colorless, translucent, and elliptical in shape. Eggs hatch in two or three days and the larvae emerge to feed. Larvae are slow moving and do not disperse far.

After two or three days, the larvae develop into a quiescent larval stage. Quiescent female larvae become attractive to the males, which pick them up and carry them to the new foliage.

Female mites are about 0.2 mm long and oval in outline. Their bodies are swollen in profile and a light yellow to amber or green in color. Males are smaller and faster moving than the female.

Males and females are very active, but the males apparently account for much of the dispersal of a broad mite population in their frenzy to carry the quiescent female larvae to new leaves. When females emerge from the quiescent stage, males immediately mate with them
Broad mites also are known to use insect hosts, including bees and whiteflies, to move from plant to plant.

Management

While a number of insecticides are labeled for control of this pest, sulfur, insecticidal oils, or soaps might be just as effective and less toxic to the environment. Due to short life cycles, frequent repeated sprays may be necessary to obtain control.

Biological control agents including several species of predatory mites have been used successfully to control broad mites in the field and in greenhouse situations.

Leave a Reply

Featured Stories
CitrusShopping For UAVs? Here Are 2 To Consider
January 25, 2015
Check out a couple of high-flying options from Altavian. Read More
OrangesScientists Center On Sweet Spot For Processed Oranges
January 24, 2015
Unique approaches and techniques being employed to sustain and squeeze more out of critical research. Read More
BerriesBerry, Berry Good [Opinion]
January 23, 2015
If you could plant any type of fruit, consider a caneberry such as a raspberry or a blackberry. Read More
NutsNew Nut Industry Equipment
January 23, 2015
These new products are designed to make a nut grower's life easier. Read More
FruitsJiffy Pumped To Introduce New Produce Propagation System
January 23, 2015
PreGro concept to make its debut at Fruit Logistica. Read More
Apples & PearsSurvey: Positive Indicators For Biocontrols In U.S. Horticulture, Agriculture
January 22, 2015
Preliminary results of a survey conducted in December 2014 of more than 850 readers across six Meister Media Worldwide titles Read More
CitrusAsian Citrus Psyllid Marches North In California Citrus Belt
January 22, 2015
Part of one of the richest agricultural areas in the U.S., Fresno County, has been quarantined. Read More
Apples & PearsReal-World Solutions Highlight First Biocontrols 2015 Conference & Tradeshow
January 22, 2015
Topping the inaugural event's marquee are presentations on “Driving Crop Quality and Productivity Using Biocontrols” by representatives from two of the largest produce growing organizations in the country. Read More
Food SafetyStill Plenty On The Plate Regarding Food Safety Modernization Act [Opinion]
January 22, 2015
Almost two years after originally being proposed, four revised rules are still being picked over. Read More
MarketingFlorida Citrus Commission Probes Federal Marketing Order For Orange Juice
January 21, 2015
Meeting to be scheduled for March to vet possibilities. Read More
The Latest
CitrusShopping For UAVs? Here Are 2 To Consider
January 25, 2015
Check out a couple of high-flying options from Altavian. Read More
OrangesScientists Center On Sweet Spot For Processed Oranges
January 24, 2015
Unique approaches and techniques being employed to sustain and squeeze more out of critical research. Read More
BerriesBerry, Berry Good [Opinion]
January 23, 2015
If you could plant any type of fruit, consider a caneberry such as a raspberry or a blackberry. Read More
NutsNew Nut Industry Equipment
January 23, 2015
These new products are designed to make a nut grower's life easier. Read More
FruitsJiffy Pumped To Introduce New Produce Propagation Syste…
January 23, 2015
PreGro concept to make its debut at Fruit Logistica. Read More
Apples & PearsSurvey: Positive Indicators For Biocontrols In U.S. Hor…
January 22, 2015
Preliminary results of a survey conducted in December 2014 of more than 850 readers across six Meister Media Worldwide titles Read More
CitrusAsian Citrus Psyllid Marches North In California Citrus…
January 22, 2015
Part of one of the richest agricultural areas in the U.S., Fresno County, has been quarantined. Read More
Apples & PearsReal-World Solutions Highlight First Biocontrols 2015 C…
January 22, 2015
Topping the inaugural event's marquee are presentations on “Driving Crop Quality and Productivity Using Biocontrols” by representatives from two of the largest produce growing organizations in the country. Read More
Food SafetyStill Plenty On The Plate Regarding Food Safety Moderni…
January 22, 2015
Almost two years after originally being proposed, four revised rules are still being picked over. Read More
MarketingFlorida Citrus Commission Probes Federal Marketing Orde…
January 21, 2015
Meeting to be scheduled for March to vet possibilities. Read More
Insect ControlExceptional Care Needed When Taking On Common Blossom T…
January 21, 2015
Learn how to identify, the survival and spread, as well as management methods for this insect pest of vegetables. Read More
VegetablesTakeaways From The 2015 Empire State Producers Expo
January 20, 2015
From crop protection pointers to potato breeding, there was no shortage of learning opportunities at the New York show. Read More
NutsNo More California Walnuts For China
January 20, 2015
Although China stopped buying California walnuts, exports to India are on the rise. Read More
NutsMeet The IPM Expert: Emily J. Symmes, UC Cooperative Ex…
January 20, 2015
Area IPM Advisor Emily Symmes helps growers preserve profits, quality and environmental stewardship through sound IPM practices. Read More
NutsSustainability Seminars Planned
January 20, 2015
Almond Board of California hosts modules on grower/huller management practices. Read More
CitrusBayer CropScience Launches Latest Insecticide, Sivanto
January 20, 2015
New product delivers precision pest control to preserve the health of plants and protect fruit and vegetable crops. Read More
Food SafetyFood Safety Recall Survival Tips
January 20, 2015
Preparation is critical to ensure a smooth process. Read More
CitrusGrowers Should Stay Grounded When Reaching For Lofty Go…
January 20, 2015
Unmanned aerial vehicles are all the rage. Can and will this technology become a standard tool for farmers? Read More