the sf • 
Tiphia and a ntly it prefers th'- heavier soils to the sandy ar- . 
New J' and some part viand. 
loniza " Tiphia should not be regarded as a substitute I 
e of miH cticide- The paras. :>s to lower 
general lev» he beetle population in an infested area ' : hia 
and other natural controls working tog» rave been known to beer 
so effective that other large-scale control measures are no longer 
necessary. 
How are Tiphia Colonies Distributed? 
The distribution, or colonization program, is accomplished 
large part through cooperation between the Bureau of Entomology and 
Plant Quarantine and the State experiment stations or departments of 
agriculture. These agencies determine the needs of their respective 
States, and the Tiphia material is provided for their distribution 
newly infested areas. Some parasite-colonization work in the area of 
general infestation is still carried on by the Bureau I mology and 
Plant Quarantine. This work supplements the Federal-State coopera: 
program, and attempts to maintain a more uniform coverage of neu 
infested areas that develop. Distribution of Tiphia parasite colonies 
is not made to individuals. 
Collection and Liberation of Tiphia 
After appraisal scouting has indicated the locations where Tiphia 
are most abundant, the process of collecting females is begun, 
attract these parasites in large numbers within reach the colh 
a 10-percent honey solution is sprayed onto the leaves of low shrubs 
and tree branches. Broad, smooth leaves, such as those 
maple, are best for this purpose, as the parasites are easier to see 
and to collect from large leaves than from very small ones. The fern.-. 
are picked from the foliage with the fingers, as this : i is fa 
cumber- 'nan using a net, although s usua 
CtOP is proficn 
illy adm: PS a slight sting * .•-. h 
ig to 
■ • 
laced 
100 
• 
i 
