Life Sciences Commons^™

Armyworm Control In Coarse Grain Crops, G D. Rimes

Journal of the Department of Agriculture, Western Australia, Series 4

Investigations of armyworm infestations carried out in Western Australia during 976 have shown that a complex of three species is involved in the spasmodic outbreaks that may cause damage to course grain crops.

This article looks at the economics of control methods.

New Control For Esperance Armyworms, G R. Strickland, G. D. Rimes

Journal of the Department of Agriculture, Western Australia, Series 4

Armyworms are periodically responsible for serious cereal crop damage in Australia, often causing up to 80 per cent crop loss.

Amajor outbreak at Esperance in 1975 resulted in some 14,200 ha requiring treatment.

This was the first serious outbreak of armyworm for nine years in Western Australia.

A major new problem in the control of armyworm outbreaks is that use of DDT has been restricted by residue and withholding period problems, especially with a crop such as barley in which the grain is unprotected by glumes.

The trial results suggest that trichlorfon is a suitable material to eradicate armyworms and …

Cattle Fertility Not Harmed By Pour-On Insecticides, D J. Barker

Journal of the Department of Agriculture, Western Australia, Series 4

Pour-on insecticides have been a feature of lice and fly control on cattle for many years and in many countries, but it seems that only in Western Australia have they been suspected of lowering fertility.

Frequent reports of this effect have been received by the Department of Agriculture since the first pour-on insecticide was marketed in W.A. in the late 1960's, culminating in the research work reported below.

The work clears pour-ons as a cause of reduced fertility in herds.