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Second International Symposium |
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Second International Symposium |
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Section I. Invitation papers
| Review of progress of biological control of weeds in Australia, including Lantana,
Croftonweed, Noogoora burr, and Baccharis K. L. S. Harley |
4 | |
| Discussion | 9 | |
| The biological control of weeds with insects in the United States L. A. Andres and C. J. Davis |
11 | |
| Discussion | 26 | |
| Selection of effective agents for the biological control of weeds | 29 | |
| Discussion | 34 | |
| Beneficial insect or plant pest? The regulatory agency’s dilemma M .J. Ramsay |
40 | |
| Discussion | 47 | |
| Conflict of interest J. J. Drea |
49 | |
| Discussion | 62 | |
| Some aspects on the biological control of aquatic weeds F. J. Bennet |
63 | |
| Discussion | 72 | |
| Competitive co-existence of phytophagous insects in the flower heads of Carduus
nutans H. Zwolfer |
74 | |
| Discussion | 81 |
Section II.
| Biological control of weeds in India; a review of introductions and
current investigations of natural enemies T. Sankarn |
82 | |
| Discussion | 87 | |
| Progress on the biological control of Lantan camara in East Africa
and discussion of problems raised by the unexpected reaction of some of the more promising insects to Sesamum indioum T. Sankaran |
89 | |
| Discussion | 93 | |
| Recent work on the assessment of the biological control potential of the Chondrilla
organisms A. J. Wapshere |
95 | |
| Discussion | 101 | |
| Insects associated with Halogeton and Salsola in Pakistan
with notes on the biology, ecology and host specificity of the important enemies G. M. Baloch |
103 | |
| The powdery mildews as potential biological control agents of Skeleton
weeds, Chondrilla juncea L S. Hasan |
114 | |
| Discussion | 120 | |
| Report on the status of the rust Uromyces rumicis introduced into
quarantine as a control agent for curly dock Rumex crispus P. Frank |
121 | |
| Discussion | 126 | |
| The specificity and host specialization of certain insects and a mite
living on Chondrilla juncea L K. Carescje |
127 | |
| Specialization of the Chondrilla fungi S. Hasan |
134 | |
| Discussion | 139 | |
| Seed production and dormancy on plants of weedy species which have been damaged by
mechanical or biological means P. B. Cavers |
140 | |
| Discussion | 144 | |
| Detection of sibling species by allozymes | 145 | |
| Discussion | 150 | |
| A comparison of strategies of screening biological control organisms A. J. Wapshere |
151 | |
| Discussion | 159 | |
| Metzneroa paucipunctella Sel. (Gelechiidae, Lepidoptera): A potential insect
for th ebiological control of Centaurea stoebe L. in Canada |
161 |
| Modern outlooks of biological control of weed plants in the U.S.S.R and
the international phytophagous Exchange O. V. Kovalev |
166 | |
| Distribution and natural enemies of Dalmation toadflax (Linaria dalmatica
Mill.) and Mediterranean sage (Salvia aethiopis L.) in Yugoslavia M. Bogavac, N. Mitic-Muzina and K. Mijatovic |
173 | |
| Preliminary studies of a strain of the waterhyacinth mite from Argentina B. D. Perkins |
179 | |
| Section III. Topical colloquium | 185 | |
| Section IV. Unstructured colloquium | 204 | |
| Section V. Business meeting | 211 |