“Vas 

Attacked by 
Host plant Cyclamen:Broad 
mite : mite 
ee a ee EE EY ACTER 



Begonia ‘saundersi-. . 2 cs 5 « 5 # © © = 8.8 8 6 8M -- 2 
Castanea dentate (Chestnut) “s. s. ee es sees ae. fee x 
OotTinis: J 1HULGeO + sae ss cee. 6 5 se awe ws eu sean z -- 
Caren ss Sik enki a ¢ a 8 ae yes Nt eeee cs ee tee -= x 
CC ge iE a eer eer EPO peer eee al OT tr BO ee x -— 
Hedera helix gracilis fhoelish vy)". sees eee ee x 
Trefite indent (lehyrenthes) <= .« °c < = sss sae. s * — 
Plantago major (broad-leaf plantain) ....+.t:* x -- 
Portulaca oleraces. (gure lone). ~ 2 nas sass eee < =a 
Primilea, MALaCOlLGES 6. + se ee eee ne re ee ee a -- 
PYAN a OUCGU LCOS i 6) 6s oe a Sea eee ear aan ar er a Oa r,s = 
Primula versicolor elatior (hardy ren mrimrose) . x -- 
Quercus virginians (live oak} Ov. 8. ss os oes op x 
Séintpaulia lonantha (African-violet) <<, ... -« s.° x —— 
Solanum. carolinense (nightshade) . .» ..« +. sss... *—= x 
Thunbergia alata (black-eyed Susan) ....-....-+ = x 
Hosts include important commercial greenhouse crops, experi- 
nental plants in Prehan Neste and weeds. The occurrence of T. 
pallidus on a widespread nertenate 1 weed, such as plantain, has an 
:, 
important bearins on the »nossible jsersistenca of this mite in field- 
crop areas or about sreenhouses or crnamental nurseries. Such an- 
ne weeds as purslane, while interestins as hosts, are less in- 
t because they ariel Gees the mites through the winter." 
High temp manure are fatal to mushroon pests.——- 
In special tes hroom insects, conducted in a mushroon 
plant at Barberton, ohio, A. GO. Davis, of the Takoma Park, Md., Lab- 
oratory, reports that the heat generated by the manure in the mush- 
room beds was fatal to the mushroom vests contained therein. He con- 

co i@ 
1931 
Pa 
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cr 
a ood 
& 
or 
cludes that an exposure over & period of 12 hours or more to temper- 
atures between 100° and 110° F. will be fatal to nearly if not quite 
all of the pests attacking mushrooms and ating exposure for 7 hours 
to tem, sratures in excess of 115” F. will Jikewise be fatal. The 
forms included in these tests were Sciara spp. (eggs, larvae, and 
pupae); Histiostoma sp. (larvae, hypopi, and adults); Tyroglyphus 
lintneri Osb. CGarvee end adults); Lenidocyrtus lanusinosus (larvae 
and. adults), and Megeselia sp. Pcie oe 
