Life Sciences Commons^™

Nontarget Effects—The Achilles’ Heel Of Biological Control? Retrospective Analyses To Reduce Risk Associated With Biocontrol Introductions, Svata M. Louda, R. W. Pemberton, M. T. Johnson, P. A. Follett

Papers in Ecology

Controversy exists over ecological risks in classical biological control. We reviewed 10 projects with quantitative data on nontarget effects. Ten patterns emerged: (a) Relatives of the pest are most likely to be attacked; (b) host-specificity testing defines physiological host range, but not ecological range; (c) prediction of ecological consequences requires population data; (d) level of impact varied, often in relation to environmental conditions; (e) information on magnitude of nontarget impact is sparse; ( f ) attack on rare native species can accelerate their decline; (g) nontarget effects can be indirect; (h) agents disperse from agroecosystems; (i) whole assemblages of species …

Learning To Live With Spotted Alfalfa Aphid, M Grimm

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

The spotted alfalfa aphid which can devastate lucerne crops and perhaps also medic pastures, has been established in Western Australia since early 1978. However several methods of control are being developed, which could allow continued production of lucerne.

Grasshoppers And Locusts In Western Australia, Clee Francis Howard Jenkins

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

GRASSHOPPERS and locusts are among the most ancient enemies of the farmer, for they figured prominently in Biblical times, and periodically throughout the ages have devastated crops in all parts of the world.

Cockroaches And Their Control, Clee Francis Howard Jenkins

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

SEVERAL species of cockroaches are general household pests.

In this country some of the native varieties have become semi-domesticated and, in addition, two or three introduced forms are quite common.

Spraying For Grasshopper Control, T J. Tozer

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

A BIG increase in cereal growing in the "hopper" belt has brought a general improvement in the grasshopper situation over the past few years.

This highlights the emphasis entomologists have placed on cultivation as the best known way of controlling grasshoppers.

Ant Pests In Western Australia, Clee Francis Howard Jenkins

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

THERE are many different species of native ants in Western Australia, but few of these are of major economic importance.

Several introduced species however, have spread extensively and have proved troublesome both as agricultural and household pests.