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 …

Green Lemons Safe From Fruit Fly, A N. Sproul

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

Importers' demands for fruit imports to be free of local pests places great restrictions on the movement of fruit between States, between countries, and sometimes within a State.

In Western Australia a Fresh Fruit Disinfestation Committee was formed in 1969 to direct State research aimed at developing techniques for post-harvest fruit sterilsation Programmes are supported by State and Federal funds and, in W.A., have provided staff and facilities to work on Mediterranean fruit fly. Parallel work with Queensland fruit fly and codlin moth is being done in New South Wales and Victoria.

Comparison Of Phototactic Behavior Of Three Populations Of Dropsophila Melanogaster, Ross S. Anderson

Journal of the Minnesota Academy of Science

Phototactic response of three distinct breeding populations of Drosophila melanogaster are compared through experimental maze runs and under differing light stimuli. While it is suggested that more meaningful results may depend on intensified selection pressure and studies of a greater number of generations, evidence from these observations indicates a clear difference in photo tactic behavior between the fly population drawn from laboratory stock subject to in-breeding and the positive responses of the two populations captured "wild" and thus reflecting the selection process of nature.

Update Of Arkansas Odonata (Anisoptera), John D. Rickett

Journal of the Arkansas Academy of Science

Seventy-five species of dragonflies have been reported in Arkansas. The present study provides 43 species; records of the other 32 are drawn from the literature and personal communication with individuals. A new species, Gomphus ozarkensis, described from western Arkansas in 1975 on the basis of minimal data emphasizes the need for extensive work in this area. Opportunities to collect and identify additional species are discussed.

Checklist Of The Coccinellidae Of Arkansas, E. Phil Rouse, Joan B. Chapin

Journal of the Arkansas Academy of Science

A checklist of 49 species of Coccinellidae in Arkansas is updated by the inclusion of species from the reference collection of the University of Arkansas and the collection in the Louisiana State University. This list extends the range of eight species. Distribution, ecological data if known, and references for their identification are included.

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.