Soós Árpád szerk.: Rovartani Közlemények (Folia Entomologica Hungarica 7/1-13. Budapest, 1954)

In 1946 300 three-day old caterpillars hatched from eggs colleoted in a garden were infected with Bosema spores. Only 8 per bent of the larvae pupated,and on the 20th day of their life only 19 per cent living animals could he counted. Microscopical investigation of the pupae showed that they were all Infected with Ho

sema bombycis

. Ihese results show that with Nog

.em

s, bombycis Hägeli. the fall webworm can be successfully controlled. The efféot of this biological control method is of course not as quick as that of chemicals,but it is lasting longer: the pathogen is transferred to the next generation through the egg and there is a possibility that, once established among the fall webworm populations, it can maintain itself as a weakening and oontroling factor without further interference. Infeotive material in large quantities is easily obtained from infected silkworms,reared from those infected eggs to be found in great numbers in the silkworm industry every year, . . Irodalom - References. 1. Kudo.R.R

.

.1924.Illinois Biol.Monogr.

,9:268. - 2.Zud

o.R.R

. ,1946.Protozoology

,3d ed

.

Ch.

0.Thomas

,Springfield

,111

. pp.788. - 3. Rosicky.B

.

.1951.Vest.Cel.Zool.spol.,

15:219. -4. S

teinhaus.E

.A.

.1949.Principles of Insect Pathology.Mc GraveHill New-York,London pp. 786. - 5. Weiser,

J

.

,1951.Vest. Csl. Zool.spol.,lj>:209. - 6. Weiser.

J.

.1954.Zool.a.Bntomol.LiBty, 2.: 55. Pelelős: Dr.Machay László Magyar Rovartani Társaság, Budapest VIII. Baross-u. 13.