Modern molecular genetic techniques are used to examine Helicove1pa armigera for variation amongst individuals from different geographical locations around Australia.

In July 1994 the International Society of Soil Science held its 15th Congress in Acapulco, Mexico. Approximately 1800 ISSS members from almost 90 nations attended.

This report arises from a scoping brief presented to the author on 19th May 1995.

Frontiers of Population Ecology Meeting program and abstracts

In March 1995 I attended two Keystone Symposia, "Frontiers of Plant Morphogenesis" and "Signal Transduction in Plants", held concurrently at Hilton Head Island, South Carolina, U.S.A.

The cotton plant has two main sets of traits that contribute to its resistance to pests: (1) chemical (e.g. gossypol) and morphological defences (e.g. okra-leaf) and (2) compensatory mechanisms for regrowth (e.g.

Cotton fibres are differentiated from single ovule epidermal cells and grow synchronously, initiating at about the time of anthesis.

Annual Report 1994-1995

This report summarises the findings from the CRDC funded project "Managing soils to avoid compaction problems in cotton growing". The project ran from 1989/90 to 1991192.

Project Objectives: Part A: (i) To study the effect of wet/dry cycles with drying by evaporation alone in ameliorating degraded furrows in retained hill cotton (at the Fressor site).

A growth disorder of cotton ( Gossypium hirsutum) occurs in irrigated cracking clay soils in cotton growing regions of northern New South Wales.

Vertosols are the main soil type on which cotton is grown in Australia. Eighty percent of irrigated cotton is grown in retained hill.

OBJECTIVES: 1. To study sampling and control practices for mirlds in irrigated and dryland cotton.

The conference was held on the 23 - 27th of August, 1994 in Silsoe, UK.

Agriculture can change the hydrologic balance of a landscape either through a change from native vegetation or the addition of water by irrigation or both.

Program

Compensation is the ability of the plant or crop to offset damage caused by pests or other factors such as hail. Compensation can act at the plant or crop levels.

The good news is that nutgrass can be controlled. The bad news is that successful control is a long-term venture.

Integrated pest management (IPM), or integrated pest control as it was originally known, is not a new concept.

Irrigation is used to negate the climatic irregularities of rainfall.