-II 6- 
Feveffew and carnatiors have also suffered from the attacks 
of this insect, 
R3JD SPIDER ( Tetran ychus tclarius L») 
Indiana H« F» Diets (May IS): la a seri ous greenhouse pest at this 
time "because during- the dark weather that we have had since 
October, 1925* florists were unable tc use customary syringing 
under strong pressure. As a result heavy infestations of this 
pest are common on rosos, carnations, gladioli, and Sweet peas. 
Mississippi R. TC. Earned (Hay 22): Rod spider injury to rose has been 
reported from Natchez in Adams County, and from Carroll ton in 
Carroll County a complaint has "been received in regard to red 
spider injury to carnation. 
GREENHOUSE TCHITEFLY ( Trialeurodcs varorariorum TC estn„ ) 
Ohio E, W w Mendenhall (May k) : This is one of the greenhouse pests 
WAich have to be fought diligently in southwestern Ohio., It is 
not new to greenhouse men for it rill breed in nearly all hot- 
houses where its host plants such: au Xantasa , orange, lemon, 
and some others arc found. Calcium cyanide seems to be effectiv 
CH RYSaITTHIMIHS 
CHRYSANTHEMUM GALL MIDGE ( Diarthronomvia hypogac a F.Loew 
Indiana H„ F. Rietz (May IS): Light infestations of the chrysanthemum 
midge have been found during the past two months at Indianapolis 
Kokomo, la Fayette, Newcastle, North Manchester, and Richmond. 
The only heavy infestations of th is re st .-./ere at Kokomo and 
Newcastle in greenhouses where no control measures were taken. 
The method of shearing off the tops of the stock plants to the 
ground line or slightly below, keeping the plants rather dry 
until growth starts again, has proved an effective control of 
midge if all stock plants are thvis treated. Better plants than 
usual have been produced through this method. 
ONION THRIPS (Thrips. tabaci L. ) 
Indiana H« F. Diets (May IS); Thrips tabaci L. has been a very troubli 
pest on chrysanthemums throughout the State. Feverfew and carnati 
have also suffered from the attacks of this insect* 
BLACK CHRYSANTHEMUM APHID ( Macrosiphoniella sanborni Gill.) 
Mississippi R. Xj. Harned (May 20): Reported by a correspondent on chryj 
mum at Laurel on this date,' and r-as determined by A. L e H I 
GREEN; CHRYS.J'T iPHID (ph oral o f 1 nhnm ruf ^ t 1 a »um 7i 
Mississippi R, iv„ Named (May 20): Reported by a correspondent on chrysanthe- 
mum at Laurel on this date and ras determined by a. L. Hamner. 
