First International Symposium on Biological Control of Weeds -- March 1969

First International Symposium

Part I. Current projects in biocontrol of weeds

	On the possibility of biological control of North American Golden rods in Europe M.Capek	1
	The biological control of Skeleton weed, Chondrilla juncea L. Entomological aspects L. Caresche	5
	The possible control of Skeleton weed, Chondrilla juncea L., using Puccinia chondrillina Bubak & Syd Sirajul Hasan	11
	Phytophasgous insects observed on water-milfoil, Myriophyllum spicatum L., in Yugoslavia in 1967-1968 M. B. Lekic	15
	Current research on biological weed control in Southern California R. D. Goeden	25
	Current research on biocontrol of weeds in Canada P. Harris	29
	Current projects at the Rome Entomology Laboratory of the USDA Paul J. Dunn	33
	Control of Rumex crispus L. with the Rust Fungus, Uromyces rumicis (Schum.) Wint.: Preliminary investigations R. E. Inman	39
	Host resistance and biological weed control R. E. Inman	41
	Studies on European Sawfly species associated with Rosa G. Scheibelreiter	47
	Studies on phytophagous insects of Euphorbia spp.: Chamaesphecia empiformis (Esp.) D. Schröder	49
	Studies on insects associated with grose, Ulex europaeus L. D. Schröder and H. Zwölfer	55
	Investigations on insects attacking European Rhamnaceae H. Malicky, R. Sobian & H. Zwölfer	59
	Current investigations on phytophagous insects associated with thistles and knapweeds H. Zwölfer	63

Part II. Problems involved in host-specificity and screening tests

	Introduction on the subject H. Zwölfer	69
	Discussion	73

Part III. The assessment of the biological control potential of organisms for controlling weeds

	Introduction to subject A. J. Wapshere	79
	The assessment of biological control potential of the organisms attacking Chondrilla juncea L. A. J. Wapshere	81
	A method to measure the percentage attack of organisms in the field W. K. Wahba	91
	Discussion	95

Part IV. Problems in searching for and collecting control organisms

	Introduction to the subject R. E. Inman	105
	Discussion	107

Part V. Possibilities of co-operation

	Introduction to the subject S. Hasan	109
	Discussion	110