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Sugarcane Aphid

 

Look back at 2016 and outlook for 2017 - January Newsletter Article

Sorghum Hybrids with Resistance to Sugarcane Aphids - K-State Agronomy eUpdate article

 

General Information and Scouting Guidelines:

www.entomology.k-state.edu

 Sugarcane Aphid

Current Infestation Information in Kansas

 

Scouting Sugarcane Aphids

Click on the picture below to read more information.

SCA Scout card

                                End of Season 2016

Sugarcane aphid map 2016 

 

                                          As of August 14

 KS Sugarcane aphid map

US Sugarcane aphid map

 

Infestation as of August 4

Sugarcane aphid has been confirmed in the following counties in Kansas: Marion, Sedgwick, Sumner, Cowley, Labette, Meade, Haskell, and Ford. Populations first reported in Sumner and Cowley counties have reached threshold levels (30% of plants infested with visible signs of honeydew on leaves) and are being treated with insecticides. Scouting fields early will help determine the need for an insecticide application before losses occur. Treating too soon may increase the need for additional insecticide treatments later, as populations can rebound based on immigration events. Scout often, as densities can change quickly. Report any infestations in new counties to your local agent or using http://myFields.info.

sugarcane aphid map

Figure 1. Current counties in Kansas confirmed with sugarcane aphid in green.

Recommended treatment options for SCA control are either Transform (Dow AgroSciences) at 1 oz per acre, or Sivanto prime (Bayer CropScience) at 4 oz per acre, applied in 15 - 20 gal of water from a ground rig. Application from the air will be more costly and less effective, as it will not permit application of these materials in sufficient volume to obtain the coverage necessary for good efficacy. The cost per acre is lower for Transform, and this material is also the least toxic alternative for aphid natural enemies. If headworms are present in damaging numbers (1-2 per head or more, the majority still less than 1 inch long), Blackhawk (Dow AgroSciences), Prevathon (Dupont) or Belt (Bayer CropScience) are alternatives that can be considered for controlling them. Note that Belt registration has just been revoked by the EPA, but existing stores may be used. Of the materials labelled for headworm control, these are the ones likely to have the lowest impact on beneficial species assisting with aphid control. We have found Prevathon to be compatible with Transform in a tank mix; all other combinations should be tested first for compatibility by mixing small amounts in a jar to ensure no precipitate forms. Read the label carefully before you spray.


-KSRE Field Crop Extension Entomology Team

First Report in 2016-July 21, 2016