INSECTS ATTACKING GREENHOUSE 
AND ORNAMENTAL PLANTS 
ASTERS 
ROOT APHID (not determined) 
Maryland C. A, Vifeigel (June 13): Root aphids are reported from northeastern 
Maryland. 
Ohio C. A. V/eigel (July 9): Root aphids are reported from Chillicothe. 
DANDELION ROOT APHID ( Trama erigeronensis Thos.) 
Indiana H. F. Dietz (June 22): This species is very abundant on the roots 
of aster. 
CHRYSANTHEMUM 
CHRYSANTHEMUM GALL-MIDGE (Di arthronoinvia hypogaea F. Lcew) 
Indiana K. F« Dietz (June 22): Among the greenhouse insects this midge is 
perhaps the most important. The ccol weather in May was very favor- 
able to the development of this insect, and where florists were not 
on their guard during this month heavy infestations took place where 
the insect had previously been under control but not entirely erad- 
icated. 
BLACK CHRYSANTHEMUM APHID ( l.acrcsiahoniella sanborni Gill.) 
Nebraska li.% H. Swenk (June 15-July l) : The last two weeks in June were 
characterized by an. unusual aoundance of aphids of several kinds. 
The black chrysanthemum aphid was frequently found doing much injury 
to chrysanthemums. 
GREEN CHRYSANTHEMUM APHID ( Aohis ruf cmaculata \7ils on) 
Indiana H. F. Dietz (June 22): This insect has been very abundant on 
chrysanthemums this year, a condition that is unusual in Indiana 
greenhouses . 
ROSE 
ROSE APHID ( Macrosiohum rosae L.) 
Indiana H. F. Dietz (June 22): This species is very abundant on roses. 
ROSE LEAF- ROLLER ( Archips rosaceana Harr.) 
New York R. E. Horsey (June 27): This species was first noted May 29. It 
is rather common on hybrid perpetual as well as our rose species — 
about the same as during the last two years but perhaps more 
scattered in all our plantings of roses, both hybrids and species. 
It is kept under control by dusting with powdered hellebore, at 
Highland Park, Rochester. 
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