Richmond times-dispatch. [volume] (Richmond, Va.) 1914-current, 1915-08-08

ooo'oOo damage IN our island OF ytsaya In m.
Philippines. - '"e
While the locust is prolific the cotton boil u.Aavu
beats him. Professor Ealand estimates that ono
"eeV laying her 139 eggs by the 10th Of June would
PROBABLY bring half that nunmber-say 75-to MAIN
rity by June 20. There are at Ieas, four eener,,,
III season, and the second generation woud numbor
ABOUT 1850; the third $3.50. and the last and final
generation l00l250. total Of 30S8 620 indviduais
as me progeny OF single pair OF wecviIs and Their
progeny IN single season That is to saw ono xeevI
field As over so per cent are desyovsI ~,
conditions 1t Is doubtful II the actual increase In one
aIarna rom single pair ever exceeds 1000 900
mologist i' 'ne emo
The gypsy moth which was introduced into this
country IN 1879 by French scientist is one Of orr
greatest insect dangers Brought here for the nr,o
Oh s.uoS me eggs OF one either blew out of the sci
entists window or of the caterpars escanad
AT any rate after few years the progeny ~ Tho CO.
capea ones descended upon Medford Mass, did enor
nous damage and began TO spread throughout the
EAST AS the female is unable to fly the onestion of
avs rapid distribution large areas was until re-
centiy puzzle to scientists. 1t has now been found
that the larvae caterpillar of the gypsy moth ia an
awen1s ~ is ct, EQUIPPED with hairs having globular
called make the caterpillar buoyant and experiments
nave SHOWN that they be by the wind for
a. enira OF mile from point less than six feet above
ule ground The most favorable time for their dis
peTsion when the temperature is above 66 degrees
and me velocity Of the wind fifteen miles hour
Ihi3 Is only one Of vast number of insects that
man has to fight against to keep his trees his orch
ARDS and his farms Next comes the host that carry
FIST IN eadlness is the mosquito. which infecs
man with malaria. yellow fever and flariasis Many
parts OF the tropics and localities otherwise most de-
slaoie are practically uninhabtabe to civilized man.
says PROFESSOR Ealand owing to the Of maa.
ria and this is especially the in West Africa and
parts or india Sir Ronald Ross says: "Malaria fever
Is Important not only because of the misery which It
nncts upon mankind. but because of the serious op.
position which It has always given to the march Of
civillza.ion In the tropics 1t is the principal and
gigantic ally of barbarian. No wild deserts, no savage
racea. no geographical difficulties have proven 40 in
lmical to civilization Unfortunately 1t haunta esnn
caily the fertile wellwatered and luxuriant
precisely those which of the greatest value to mon
We may say that 1t has withheld entire Continent
Africa" ''' "
Creighton in the Encyclopedia Britannica saws Tint
malaria has been estimated to produce half the entire
mortality of the human race" 80 ''e
In Italy in 1900 FIVE million acres Of italian arr,
cultural land remained practically uncutivatad he
cause Of malaria The depopuation the campsgna
ried by mosquitoes. which entered with tho oraa
naries of Sulla and Marius ~ o nneiee
Malaria has been held responsh,e -or D.. ,,
out OF the ancient Greeks ~ 'o "ipins
Not health alone. but mans very pockets ara a.