pdf, 57.71Mb - Entomological Society of Canada
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Table 54<br />
Biological control <strong>of</strong> forest insect pests 221<br />
Evaluation <strong>of</strong> biological control attempts against forest insect pests using entomopathogens·<br />
Entomopathogens<br />
Pest Type Degree <strong>of</strong> success··<br />
Chorisloneura fumiferana NPV-CPV-GV-EV·" slight<br />
Chorisloneura occidenraiis<br />
GiJpinia herr:yniae<br />
Lyl11lJlJJria dispar<br />
Maiacosoma disstria<br />
Neodiprion abietis<br />
Neodiprion Iecontei<br />
Neodiprion sertifer<br />
Neodiprion swainei<br />
Operophtera bruceala<br />
Orgyitl Jeucostigma<br />
Orgyitl pseudotsugata<br />
••<br />
...<br />
••••<br />
8.1.<br />
NPV<br />
8.1.<br />
NPV<br />
NPV<br />
8.1.<br />
NPV<br />
8.1.<br />
NPV<br />
NPV<br />
NPV<br />
NPV<br />
NPV<br />
NPV<br />
NPV<br />
B.t.<br />
good<br />
none<br />
none<br />
exceUent· .. •<br />
slight<br />
slight<br />
none<br />
good<br />
unknown<br />
excellent<br />
excellent<br />
good<br />
unknown<br />
good<br />
good<br />
slight<br />
Covering the period 1969-80, except for N. Ieconrei and G. herc:yniae where work<br />
was undertaken before 1969.<br />
The rating system is as follows:<br />
slight - decreased pest population but little damage prevented.<br />
good - decreased pest population and damage reduced to economically acceptable<br />
levels<br />
excellent - pest populations and damage reduced to almost zero.<br />
NPV<br />
CPV<br />
GV<br />
EV<br />
B.t.<br />
nuclear polyhedrosis virus<br />
cytoplasmic polyhedrosis virus<br />
granulosis virus<br />
entomopox virus<br />
Bacillus thuringiensis<br />
Acting in conjunction with parasitoids .<br />
regulated by using biological control agents and that success was equally divided<br />
between parasitoids and entomopathogens. A number <strong>of</strong> evaluations cannot yet be<br />
made due to lack <strong>of</strong> data, although in some cases, as mentioned later, prospects for<br />
success are promising. Brief details <strong>of</strong> control evaluations with parasitoids and predators,<br />
and with entomopathogens are as follows.<br />
Parasitoids and predators<br />
Many <strong>of</strong> the following chapters report work continued from the previous review period.<br />
Most evaluations have been directed to technical success in control and little further can<br />
be added to the earlier tentative economic assessments <strong>of</strong> Reeks & Cameron (1971). C.
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