Territory Stories

Technical annual report 2000-01

Details:

Title

Technical annual report 2000-01

Collection

Dept. of Regional Development, Primary Industry, Fisheries and Resources technical annual report; Department of Regional Development, Primary Industry, Fisheries and Resources technical and annual report; Reports; PublicationNT; Technical bulletin (Northern Territory. Dept. of Primary Industry and Fisheries) ; no. 295

Date

2001-10

Description

Made available via the Publications (Legal Deposit) Act 2004 (NT).

Notes

Date:2001-10

Language

English

Subject

Agriculture -- Northern Territory -- Periodicals; Fisheries -- Northern Territory -- Periodicals

Publisher name

Dept. of Primary Industry and Fisheries

Place of publication

Darwin

Series

Technical bulletin (Northern Territory. Dept. of Primary Industry and Fisheries) ; no. 295

ISSN

0158-2763

Copyright owner

Check within Publication or with content Publisher.

Parent handle

https://hdl.handle.net/10070/223369

Citation address

https://hdl.handle.net/10070/687151

Page content

Department of Primary Industry and Fisheries 28 PROJECT: Insect Dynamics of the Cotton Ecosystem in the NT Project Officers: A. Ward, K. Shrimp and M. Connolly Location: Katherine Research Station Objective: To benchmark the ecology of the key pest and beneficial insects that are likely to impact on a future cotton industry in the Katherine area before assessing preliminary integrated pest management systems. Background: An essential component of any cotton production system in the Northern Territory is a sustainable insect management package based on an understanding of the ecology of both pest and beneficial insects. To complete this research, funding has been obtained from the Australian Cotton Cooperative Research Centre. Research commenced in April 2001 with the planting of the 2001 cotton crop. Progress: To meet the project objectives studies are being undertaken in three key areas. These are population dynamics, resistance management and the assessment of preliminary components of potential IPM systems for NT cotton. The following activities are being undertaken to complete these tasks: Population dynamics Twice weekly monitoring of crops grown using both permanent trickle tape and overhead irrigation to assess the abundance and bio-diversity of the pest and beneficial insects in each system. Included in the overhead irrigation area are small blocks of Twingard cotton and unsprayed conventional cotton. Weekly monitoring of the seasonal abundance of Lepidopterous pests at eight sites including both bush and established cropping areas using pheromone traps. Species being examined are Helicoverpa armigera (8) H. punctigera (8) Spodoptera litura (5) Pectinophora gossypiella (5) and Spodoptera exigua (2). Two weekly monitoring of egg and larval parasitism in Helicoverpa and how this changes over time. Andrew Davies (University of Queensland) will identify Trichogramma sp. Two weekly monitoring of Helicoverpa populations using Lepton test kits to identify how the species mix changes throughout the season. Regular monitoring of the broader environment to determine the sources of both pest and beneficial insects outside the cotton ecosystem. Resistance monitoring Baseline susceptibility of H. armigera and H. punctigera to BT at Katherine is being assessed in collaboration with Dr Hoe Dang at ACRI. Helicoverpa spp. resistance to other insecticides is being assessed in collaboration with Dr Robin Gunning from NSW Agriculture in Tamworth. Assessment of components of potential IPM systems for NT cotton Assessment of the suitability of various trap crops for both sucking insects (green vegetable bugs and brown mirids) and Helicoverpa. The crops being assessed are niger, chickpea, sesame, lablab, kenaf and pigeon pea. Preliminary assessment of the insecticides applied both at planting and as a side dressing at first square to control early-season sucking insects.