Tuesday, May 24, 2016

Blacklands Update

Sugarcane and Yellow Sugarcane aphids are slowly increasing in population, and individuals and small colonies (3-4 aphids) can be seen on the mid-upper leaves. Populations remain well below thresholds.
The pictures below (taken today) show SCA on sorghum in Hill County. Only a few populations this large have been seen in the fields, and these were isolated colonies (surrounding plants were clean). You can see larvae of the Scymnas ladybug preying on the aphids. Beneficial activity has been high.

Monday, May 9, 2016

SCA found on sorghum in Hill County

A few sugarcane aphids (SCA) have been found feeding on sorghum around Itasca as of Friday, May 6. Aphid numbers are very small, on less than 1% of plants with only one or two aphids per colony. SCA were found last year as early as May 29th.

Winged SCA and two nymphs.

One SCA in a colony of Yellow SCA.

Tuesday, May 3, 2016

Sugarcane Aphid Found in Lubbock County

Dr. Pat Porter and I found several sugarcane aphids this morning on Johnson grass about 6 miles east of New Deal. We found adults, several nymphs and even one alatoid (a nymph that will soon become a winged adult). We confirmed that these are in fact sugarcane aphids using a microscope and identifying their characteristic dark-tipped antennae, cornicles and feet. This finding on May 3 is almost a full eight weeks before the first sighting of SCA in Lubbock Co on June 27 last year.

SCA on Johnson grass. Photo by Pat Porter.