Remain Vigilant and Respond Immediately to Increases in Brown Marmorated Stink Bug

While the nymphal feeding during the summer was reduced by effective and well-timed insecticide treatments, the feeding by continuously wandering BMSB adults is very difficult to control. With one more month of the harvest to go, it is extremely important that growers continue to stay vigilant and respond immediately when the pressure from incoming BMSB adults start to increase. Although it varies for each cultivar, it is still the time for the use of remaining effective options, with the shortest PHI. Unfortunately, although the pressure from BMSB at this time is the highest, the use of insecticides is the most difficult and the choices are limited.

The following list includes insecticides with significant activity against BMSB adults, as well as the pre-harvest (PHI) information for each product (organized by the shortest PHI):

Dinotefuran (IRAC Group 4A) (Scorpion, Venom, Special Section 18 emergency registration until Oct 15, 2012) – 3 days PHI on pome fruit, no more than 2 applications of this active ingredient per season, BMSB adult direct contact mortality at 72 hours – about 98%

Acetamiprid (IRAC Group 4A) (Assail 30 SG)– 7 day PHI on pome fruit, no more than 32.0 oz of formulated product per acre per season, BMSB adult direct contact mortality at 72 hours - about 87%

Clothianidin (IRAC Group 4A)(Belay) – 7 days PHI on apples; no more than 0.2 lb AI per acre/per season is allowed, BMSB adult direct contact mortality at 72 hours - 100%

Imidacloprid (IRAC Group 4A) (Admire Pro, Leverage (imidacloprid mix with beta- cyfluthrin)) – Admire Pro has 7 day PHI on pome fruit, no more than 0.5 lb AI per season; Leverage SC 360 has 7 day PHI on pome fruit, no more than 0.044 lb AI per acre of beta cyfluthrin and/or 0.088 lb AI per acre of imidacloprid. Admire Pro BMSB adult direct contact mortality at 72 hours – about 87%; while for Leverage the BMSB adult direct contact mortality at 72 hours – about 93%

Bifenthrin (IRAC Group 3, Special Section 18 emergency registration until Oct 15, 2015) (Brigade WSB, Bifenture EC and Bifenture 10DF): 14 days PHI, two applications per season at least 30 days apart, direct contact efficacy: 100 percent

Fenpropathrin (IRAC Group 3)(Danitol) – 14 day PHI on apples; no more than 0.8 pound of AI is allowed per acre/season, BMSB adult direct contact mortality at 72 hours – about 82%

Methomyl (IRAC Group 1A)(Lannate) – 14 day PHI on apples; on apples no more than 4.5 pounds of AI/acre is allowed, BMSB adult direct contact mortality at 72 hours – about 90%

Lambda-cyhalothrin (IRAC Group3) (Warrior II with Zeon Technology, Taiga Z) – 21 day PHI on pome fruit, BMSB adult direct contact mortality at 72 hours – about 72%

The insect pest control update presented is for the south-central part of Pennsylvania based on observations in Adams County, PA.

DEGREE-DAY TABLE

Accumulated degree-days base 43 degrees F from Jan 01 for each reported year (courtesy of SkyBit, Inc.). The accumulated degree-days for the last date of the current year (Sept 28) mentioned in the table are based on the weather forecast.

SEASONAL ACTIVITY OF FRUIT PESTS

2012 season weekly captures of adult moths in pheromone traps located at Penn State FREC Biglerville, PA (Adams County).