Small-plot Trials of Surround™ and 

 Actara™ for Control of Common 

 Insect Pests of Apples 



Starker Wright, Russell Fleury, Robin Mittenthal, and Ronald Prokopy 

 Department of Entomology, University of Massachusetts 



Given the likelihood of removal or restriction of some 

 current chemical tools for management of key pests of apple 

 m the Northeast, pursuit of miproved chemically or biologi- 

 cally based alternatives to standard materials has gained 

 emphasis. In the 2001 growing season, we will begin a 

 project designed to evaluate and improve efficacy of multi- 

 tactic approaches to management of major arthropod pests. 

 Under this project, our research goals for the 2001-2002 

 growing seasons rely on the availability of potentially effec- 

 tive new chemicals to substitute for current standards, par- 

 ticularly Guthion and Imidan. Of recently (or soon-to-be) 

 labeled materials, a few may fill potential gaps in arthropod 



management in the absence or restriction of organophos- 

 phate and carbamate insecticides. As a lead-in for the 2001- 

 2002 project phase, we conducted small-plot tests of two 

 new insecticides: Actara (thiamethoxam) and Surround (ka- 

 olin clay). 



In this study, our objectives were to (a) evaluate two 

 rates of Actara for control of early-season fruit-injuring pests 

 (principally European apple sawfly and plum curculio) and 

 (b) evaluate Surround for control of all insect pests of fruit 

 active after pink (European apple sawfly, plum curculio, 

 apple maggot, leafrollers, codling moth, oriental fiiiit moth, 

 San Jose scale, and stink bugs). 



PRISCILLA 



NEW YORK #s 















LIBERTY 



RED FREE 



OOC = 3-trce treatment plot 



= central (sampled) tree of each plot 



Figure 1 Plot design. University of Massachusetts Horticultural Research Center. Treatments were applied to 

 three-tree plots, with each treatment randomly distributed within a variety/row. Each treatment was replicated 12 

 times. Fruit samples were drawn from the central tree in each plot. 



22 



Fruit Notes, Volume 65, 2000 



