Lesser Corn Stalker
Lesser Corn Stalker

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The Peanut IPM Slide Chart is a critical tool for peanut producers, crop consultants, ag retailers, and pesticide dealers in Alabama. This slide chart provides information about pest identification and scouting methods, insecticide choices and application rates, and much more for a quick-reference. To order the slide chart by mail, please contact Dr. Ayanava Majumdar by email at azm0024@aces.edu or by contacting an Agronomic Crops Regional Extension Agent near you.

 

 

*This is an excerpt from Scouting Techniques for Soil Insect Pests of Peanuts, ANR-1364

Wireworms have become the major insect pest of peanuts under certain cropping conditions. Several species of wireworms occur in peanut fields, so an independent description for all species is not provided in this publication. Wireworms can cause significant late-season loss of peanut pods. Overwintering stage: Larvae overwinter in soil and move deep into it to prevent dehydration and reduce threat from natural enemies. Wireworms have an extended life cycle (2 to 9 years), depending on the species. Behavioral clues: Good mobility of larvae makes management of the insect very difficult. Larvae prefer soil moisture in the range of 6 to 16 percent and become immobile at low soil temperatures. Wireworms are also infamous for their behavioral resistance (i.e., many species have the ability to avoid insecticide-treated areas resulting in control failure).

Scouting Techniques

• Sampling. Wireworm larvae make a large entry hole on the distal end of pods. Pod injury could be highly clumped (nonuniform), so draw a large number of pod samples from different parts of the field for high sampling accuracy.

• Germinating seed baits. Fields with a history of infestations should be intensively scouted before planting. The most reliable sampling method is with germinating seed baits placed in soil. Wireworms are attracted to the carbon dioxide and heat released by germinating seeds in ground baits. Note that the attractiveness of seed baits varies with wireworm species (e.g., corn/wheat seed bait are attractive to Agriotes and Melanotus sp., and sorghum seed baits are attractive to Conoderus sp.).

• Pitfall traps. These have been very effective for catching surface-dwelling click beetles (i.e., adult wireworms). Several pitfall traps (plastic cups filled one-third with soapy water) should be deployed in suspected fields, especially between the peanut rows, and traps should be marked with tall flags to increase visibility. Action threshold: One or more wireworms from each bait station indicate a need for treatment.

Read here to learn more about Scouting Techniques for Soil Insect Pests of Peanuts.

 

*This is an excerpt from Citrus Pest Identification and Management Guide, ANR- 2270.

The most characteristic symptom of HLB is blotchy mottling that appears asymmetrically on the leaf blade. Green islands may also occur; these are small, circular, dark green dots that contrast with the light yellow/green background. Foliar symptoms that resemble nutrient deficiencies may be present. A tree may exhibit yellow shoots or other nutrient deficiency symptoms on one or more branches randomly in the canopy. Fruit may be small and lopsided or ripen backward, with the stylar end remaining green as the fruit colors.

Management tips: Citrus greening has not been found in Alabama to date. If citrus greening is suspected, contact your local diagnostic lab.

 

Read more about Citrus Pest Identification and Management Guide.

Download a PDF of Citrus Pest Identification and Management Guide, ANR- 2270.

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