Lovuistana—Crrcuuar No. 12. 7 
West InpIAN PreacH SCALE. 
This is a white scale insect, which sometimes does a great 
ceal of damage to peach and plum trees, and which as yet is 
restricted in Louisiana to a few localities. It was first introduced 
into this country from the West Indies, as may be judged from 
its name. When it is found in or near a nursery, its eradication 
is insisted on before a certificate of inspection is granted the 
nurseryman. 
Woo.tiy APHIS. 
The woolly aphis is a soft-bodied plant louse, which lives on 
apple trees. It lives both above and below the ground, but the 
form on the roots is the most dangerous, because harder to treat. 
It exeretes a white, fluffy substance, looking very much like wool, 
which substance gives it its common name. It causes galls on 
the roots of the trees very much like those of the nematode 
root worms. When these insects are found in a nursery, the 
same measures are enforced as against the nematode root knot. 
WHITE Fy. 
White flies are among our most common and most injurious 
insects on citrus trees, cape jasmine, Ligustrum, etc. In the 
younger stages they look very much like scale insects, but belong 
to an allied family. The larve are found on the under side of 
the leaves as small, oval, whitish, scale-like bodies, which have 
the faculty of exuding a sweet substance called honey-dew. Cer- 
tain plant organisms, known as fungi, grow in this honey-dew, 
and give rise to the black or smutty appearance so common on 
oranges and cape jasmine in this State. To prevent the spread- 
ing of this insect to the portions of the State not yet infested, 
the regulations of the Commission require all citrus nursery 
stock to be defoliated before shipment is made. 
A comprehensive article upon the habits of the white fly, 
and its eontrol, has been prepared and copies may be had on 
application to the Secretary of the Commission at Baton Rouge. 
