10 



little influence on the cooling rate of the strawberries, although 

 those in clear polystyrene quart baskets cooled slightly slower 

 than those in paper pulp or veneer (wood) baskets. The authors 

 mentioned that the excellent visibility afforded by the polystyrene 

 baskets, and the relatively small storage space needed for empty 

 baskets, are additional assets of the clear polystyrene containers. 



*************** 



PROBLEM WEEDS IN APPLE ORCHARDS AND THEIR CONTROL 



William J. Lord 

 Department of Plant and Soil Sciences 



Although we have several good herbicides available fo 

 apple orchards, certain perennial broadleaf weeds such as 

 poison ivy, milkweed, trailing blackberries and morning gl 

 become a problem where chemical weed control is practiced, 

 weeds may have been present before the use of herbicides, 

 chemical control of the more susceptible weeds has made co 

 more favorable for their growth and allowed them to become 

 serious problems. Because of herbicide usage for the cont 

 perennial grasses, we also have encountered an increasing 

 with some annual grasses, namely, crabgrass, foxtail, fall 

 and barnyard grass, which invade the weed-free areas in mi 

 late-summer. For those of you concerned with one or more 

 problem weeds mentioned above, we have prepared below our 

 tions for their control. 



r use m 

 dandelions , 

 ory have 



These 

 but the 

 nditions 



more 

 rol of 

 problem 



panicum 

 d- and 

 of the 

 sugges- 



Problem Weed 



Brambles 



Poison ivy 



Herbicide to Use 



Remarks 



Perennial Broadleaf Weeds 



Ammate X* Contrary to some re- 



ports, we have found 

 that 2 applications 

 of a 2,4-D formulation 

 in the same season 

 failed to control bram- 

 bles. 



Ammate X* 



Weedone 638*, Dacamine* 

 or Dacamine 4D* would 

 be a second choice. 



Dandelions, Dock, 

 Bindweed, Plantain, 

 and Sorrel 



2,4-D formulations: Optimum time of appli- 

 Dacamine* or Dacamine cation will vary with 

 4D* weed species. 



