Mitigate Pesticide Resistance

Several questions come to the mind of crop protection professionals as they ready to transverse a given field and scout for potential threats to a crop. Whether it is a field of sweet corn, a block of crisp leafy greens, rows of seedlings just emerging or transplants flowering, the history of previous observations and actions are both considerations that should be made before setting foot in the field.

Knowing what the situation was during the most recent scouting excursion and the consequent decision made is essential to gauging how effective the action taken was and influences the next step to take. Once boots are on the ground and in the field, careful inspection of the crop is another critical component of the decision making process. Only thorough scouting methods like turning over leaves, inspecting blossoms with a hand lens, digging up roots, checking traps, soil moisture and the like can the severity of threats to the crop be determined. A pesticide application may not be needed and therefore can be conserved for future use when actually warranted.

Sometimes, however, a spray is justified and proper identification of pests, diseases and abiotic disorders becomes of the upmost importance to crop protection professionals so they can make the best management decision. Crop consultants and managers rely on scouts to confidently and accurately report what is found standing, crawling, creeping, hopping, flying or trying to hide within the crop. These decision makers depend on scouts to know whether what they find is friend or foe as well as the developmental stage of the crop and potential pest. Frequency of occurrence and spatial distribution within the field are also needed to access the threat to the crop. Consultants and managers can begin to determine the best action to take with such information in-hand.

How immediate the threat of damage to the crop may be plays a significant role in the consideration of a pesticide application or whether another means of management should be implemented. An accurate, complete and timely scouting report allows the examination of alternative measures and appropriate pesticides. Therefore critical inspection of the crop is essential so unnecessary sprays are avoided. This is especially true since there are cases where abnormal looking plants are the result of abiotic factors such as a nutrient deficiency, improper soil moisture, high winds, temperature extremes or herbicide damage. Other times symptoms of a sickly plant may be very similar in appearance but the result different biotic causal agents.

One case in point includes symptoms of distorted new growth commonly seen in peppers. New growers are delving into pepper production as the popularity of fresh farmers and green markets increases. Broad mite damage caused by Polyphagotarsonemus latus is commonly misdiagnosed as virus symptoms or herbicide damage.

Broad mites feed using piercing-sucking mouthparts, which inject a toxin causing leaf petioles to elongate and leaves to become twisted, hardened and shrunken. Their feeding can also result in vegetative and flower buds abscission. The new foliage should be examined thoroughly with a hand lense when such symptoms are discovered. Early detection and treatment will mitigate any impending damage and minimize the use of unnecessary pesticide applications due to an inaccurate identification.

Refer to EDIS publications EENY-183 and ENY-658 for more information on broad mites and thrips management respectively.

Topics:

Leave a Reply

Crop Protection Stories
Purple sage (Salvia dorrii) (Photo credit: Flickr user Five Acre Geographic)
Disease Control
May 19, 2016
Native Plants Reduce Need For Vineyard Water, Pesticide Usage
Scientists in eastern Washington are finding drought-tolerant alternatives to roses at the end of vineyard rows that not only save Read More
wine bottles
Citrus
May 17, 2016
Border Protection Intercepts New Leafhopper In Wine Shipment
First of its kind found in European shipment. Read More
A two-spotted spider mite. (Photo credit: www.bugwood.org)
Insect Control
May 16, 2016
Tips For Balancing Almond Mites And Predators
Almond growers need to do a delicate dance to keep spider mite populations down, but not so far that beneficial Read More
lettuce field 14_WR
Crop Protection
May 16, 2016
New Fungicide For Lettuce And Strawberry Growers
The product from Summit Agro USA is for use to control botrytis gray mold in strawberries and Sclerotinia drop in lettuce. Read More
weeds poking out of plastic beds
Citrus
May 16, 2016
3 New Herbicides For Florida Farmers To Consider
Trio of unique crop protection chemistries beckoning growers to whack weeds with these. Read More
Beekeeper shows off honey comb at Churchview Farm
Citrus
May 10, 2016
Survey: Beekeepers Lost 44% Of Bees Last Year
Responses indicate summer losses rival winter losses for second year in a row. Read More
Brown marmorated stink bug. (Photo credit: USDA)
Crop Protection
May 6, 2016
Scouting Tips For Growing Grape Pest Threat
Grape growers should be on the lookout this fall for two pests that are popping up in vineyards along the Read More
The Latest
Citrus
May 23, 2016
World Health Organization Experts: Glyph…
Risk unlikely when consuming crops treated with herbicide. Read More
Citrus
May 19, 2016
Bayer Makes Bid For Monsanto
Monsanto says proposal is being reviewed by board of directors as well as legal and financial advisors. Read More
Crop Protection
May 16, 2016
New Fungicide For Lettuce And Strawberry…
The product from Summit Agro USA is for use to control botrytis gray mold in strawberries and Sclerotinia drop in lettuce. Read More
Citrus
May 10, 2016
Survey: Beekeepers Lost 44% Of Bees Last…
Responses indicate summer losses rival winter losses for second year in a row. Read More
Crop Protection
May 6, 2016
Scouting Tips For Growing Grape Pest Thr…
Grape growers should be on the lookout this fall for two pests that are popping up in vineyards along the Read More
Crop Protection
May 6, 2016
Late Blight Hotlines For Potato Growers …
Offering management information for five key potato-growing regions, the hotlines provide data on weather threats, disease pressures, and scouting. Read More
Crop Protection
May 5, 2016
Michigan Researcher Leads $2.3-Million G…
Michigan State’s Mary Hausbeck along with a multistate research team will work to enhance and refine early detection methods, allowing growers to identify the pathogen’s presence in the air -- before it infects fields. Read More
Crop Protection
April 30, 2016
How To Elect The Right Fungicide For The…
Fungicide application is one tool of a successful IPM program for crop diseases. Used judiciously and appropriately, these chemicals are powerful allies in the fight against the fungi and bacteria that attack crops. Read More
Citrus
April 28, 2016
Brandt Acquires Majority Interest In Uta…
Baicor will operate as a subsidiary in Brandt’s specialty formulations division. Read More
Crop Protection
April 27, 2016
Vector Transmitting Red Blotch Virus Fou…
Researchers at the University of California, Davis (UC-Davis) have found the vector that seems to be spreading grapevine red blotch, a Read More
Berries
April 27, 2016
New Herbicide For Tomatoes, Strawberries
The product from Helm Agro US is registered to control more than 100 broadleaf, grass, and sedge species. Read More
Crop Protection
April 25, 2016
Ranman Fungicide Registered For Downy Mi…
Product features a zero-day pre-harvest interval, allowing application up to the day of harvest. Read More
Citrus
April 20, 2016
USDA Offers $4 Million For Pest Manageme…
Funding to be used to increase crop protection practices, tackle high-priority pests. Read More
Crop Protection
April 20, 2016
A Cool, Wet Spring Means Increased Pest …
Growers in the East seeing increasing pressure from green fruitworm and rosy apple aphid, need to start scouting for black stem borer. Read More
Crop Protection
April 18, 2016
Researchers From Clemson University Offe…
A new online spray guide is designed to help growers deal with three major diseases that affect watermelon leaves in the Southeastern U.S. Read More
Crop Protection
April 18, 2016
Valent BioSciences Announces Biorational…
Valent BioSciences Corporation has announced plans to construct a new state of the art Biorational Research Center as an expansion Read More
Crop Protection
April 7, 2016
6 Steps To Increase Efficiencies On The …
Embracing industry changes, New York’s Turek Farms looks to find better ways to get the job done. Read More
Crop Protection
April 6, 2016
Fungicide Receives Registration For Down…
With a zero-day pre-harvest interval, Ranman can be applied up to the day of harvest. Read More
[gravityform id="62" title="false" description="false"]