only physically beat you up. but their incessant 

 noise wore you down by the end of the day. 



We. as an industry, were much more lax on per- 

 sonal safety protection then than we are now Its 

 sad at tree gatherings to see how many of the "old 

 guys" just don't catch the end of your sentence like 

 they used to Ear protection, leg chaps, and hard 

 hats are mandatory use now and back belts are 

 close to being required 



Years ago. our chain saws were heavy and bulky 

 Today, they're such a pleasure to use Weight reduc- 

 tion, increased r p m s. slick design, many foreign 

 models makes it sound like the automotive industry, 

 doesn't it^ Instead, this is the state of the chain saw we 

 use today Romanticized in the 'TOs along with wood 

 stoves and solar power as the necessities for living in 

 New England, the chain saw has revolutionized the 

 work ot arborists like no other tool Small saws with 

 tremendous power for last cutting enable a tree 

 worker to dismantle the largest tree in short order 



There is a downside to new technology that is 

 disturbing Modern tools make the various iobs 

 easier to do. requiring a less skilled worker to do it 

 This translates to a possible drop in quality of the 

 finished product Hand skills require more thought 

 and time to accomplish a technical solution to a 

 problem Less experience people can do passable 

 work, oblivious to tradition and ethics of the trade 



It often seems that some appreciation of the tree 

 itself has been lost Good tree companies have bal- 

 ance and offer many services to preserve our urban 

 forest It is clear that the new sophisticated equip- 

 ment is exciting Cabling and bracing gear is much im- 

 proved, hence more apt to be used New fertilization 

 methods and tools have increased efficiency, enabling 

 the soil to be replenished with the elements the tree 

 needs in a more direct manner Spraying equipment 

 and new products are so refined that spray applica- 

 tions are safer and more effective 



Change, of course, is necessary and good, but it must 

 be tempered by respect lor the past Arboriculture has 

 been very rewarding tor me It has continually stimu- 

 lated interest and enthusiasm for what the next day 

 might bring 



\effreii Garland is the General Manager of Keene Tree Service 

 in Keene. New Hampshire He is also the Vice President of the 

 New Hampshire Arborisl ^sso(ialion and a career arborisl 



W^ 



The Green Spot 



Diapause Zool.--(i period oi ral during the development of 

 insects and other arthropods characterized by a cessation of 

 growth in immature stages 



Diapause Is a term we have to understand If we 

 use biological pest control, as some of the agents 

 we purchase may undergo diapause. Aphidoletes 

 aphidimyza and Or/us insidiosis (an aphid predator 

 and a thrlps predator, respectively! are two common 

 examples. In the case of these two predators, dia- 

 pause Is Induced by photoperlod: both need a 14-16 

 hour day. 



When day length falls below acceptable levels, 

 these Insects will stop reproducing; any existing off- 

 spring will lie In wait and consequently, the adults 

 will slow their feeding because they no longer need 

 the energy required for reproduction However, 

 they can often be tricked into staying active by sim- 

 ply providing supplemental lighting. A. aphidimyza. 

 for example, will not undergo diapause within a 

 60-foot radius around a simple 60-watt Incandescent 

 light, assuming temperatures average over 40F. 

 (Low temperatures— and other factors— can also 

 cause diapause! 



Experiments are now being conducted at the 

 University of Maine, Orono, with Onus insidiosis on 

 short-day crops, namely mums. UM is using a blue 

 light to prevent diapause while not inhibiting 

 flower development. If successful, this experiment 

 will open a door previously thought inaccessible. 



Other arthropods may similarly undergo periods 

 of slowed activity caused by photoperlod. tempera- 

 ture, etc. Though not a true diapause, this period 

 may result in decreased efficacy. However. In win- 

 ter, most pests slow down too. 



Being growers. I'm sure you re all familiar with 

 photoperlod After all, you wouldn t have early 

 flower bracts on polnsettlas without manipulating 

 the photoperlod. Well, sometimes the same rules 

 apply to biological pest control agents — just in re- 

 verse. 



Mifte Cherim. owner of the Green Spot — a company supply- 

 ing biological pes! control agents and associated products — 

 can be reached at 603-942-8Q25 



The Mors You Qdw, The More You Know. 



We've been in ihis business a long time. We know our (f^ f^^OfthCClSt NlirS€ty, lUC. 



.versu^^^i^ "^ 



'ill — .J_^__^ 



fe've been in ihis business a long time. We know our 

 cusiomer's needs and demands. It dosen'i make a difference of the 

 lime of year or the size of ihe project. Northeast Nursery covere 

 all. With the widest selection in wholesale plant materials and 

 landscape supplies in all of New England it's no wonder many 

 consider Norlkeasi Nursery the best One-Stop shopping for 

 your landscape and green supplies. 



Supplying Fine Plant Mcuerial <6 Landscape Supplies 



234 Newbury Street, Rt. 1 South 



Peabody, MA 01960 



Tel. (508) 535-6550 Fax (508) 535-5247 



OCTOBER NOVEMBER IW4 



