Cotton pests in the NT incl. Bicoloured Weevils

Cotton pests in the NT incl. Bicoloured Weevils
  • Cotton Grains Cattle program
  • Agriculture
  • Broadacre cropping

Summary

Cotton pests in the NT – This practical field guide provides an overview of the major insect pests affecting cotton production in the Northern Territory and promotes the use of integrated pest management (IPM) to minimise crop losses while reducing reliance on insecticides. The publication includes identification information, life cycle descriptions and damage symptoms for a range of key pests including aphids, mirids, green vegetable bugs, cotton stainers, cotton coreids, mealybugs, bicoloured boll weevils, pumpkin beetles, Helicoverpa species, cluster caterpillars, pink bollworm, rough bollworm and cotton loopers. The guide supports growers, agronomists and industry stakeholders to accurately identify pest threats and implement effective management strategies that protect crop productivity and preserve beneficial insect populations in northern Australian cotton systems.

Bicoloured weevils – a novel pest of Territory cotton
This factsheet provides the first detailed overview of the bicoloured weevil (Eudelodes bicolor), an emerging native pest affecting cotton production in northern Australia. First observed in commercial cotton crops in the Northern Territory in 2021, the pest has increased in abundance and impact, with adults feeding on cotton flowers and larvae causing premature boll shedding and yield losses. The publication describes the insect’s life cycle, identification characteristics, monitoring methods and current management options. It also compares the bicoloured weevil with related cotton boll weevil species found internationally and highlights the need for further research into environmentally responsible control measures. The factsheet provides practical guidance for growers and advisers, supporting early detection and integrated pest management strategies as cotton production expands across northern Australia.

Projects

Cotton Grains Cattle program: Addressing the fundamentals of cropping-systems in the Northern Territory

Cotton Grains Cattle program: Addressing the fundamentals of cropping-systems in the Northern Territory

Improving the productivity and profitability of the Northern Territory’s cropping system is crucial for the sustainable growth of the regions agriculture sector. Current research and development efforts, along with major infrastructure investments, are supporting the establishment of a self-sustaining cotton industry in the Top End. However, significant knowledge gaps remain in areas such as crop establishment, agronomy, biosecurity, technical skills, and the social factors that present barriers to the growth of broadacre cropping in the Northern Territory. These gaps must be addressed for the sector to fully realise its potential. This project will integrate cropping trials with efforts to characterise and map soil types and water-holding capacity at participating trial sites, as well as in new potential cotton-growing areas across the Northern Territory. Scenario planning will also be conducted to better understand the economic and environmental impacts of the project’s recommendations. Practice change, guided by the knowledge co-generated throughout the life of the project, will lead to sustainable social, environmental, and economical impacts. Specific outcomes include: Growers confidently adopting crop establishment recommendations for reliable production. Growers making informed decisions on crop rotation and cover crops to maximise production and profitability. Growers making informed and conscious decisions regarding nutrition application and the selection of  integrated pest management (IPM) strategies for insect and disease control. Current growers and potential investors in the Northern Territory having access to adequate information for selecting suitable crops for new establishments. Growers having access to a decision-making toolkit that supports investment in the industry, including risk management planning. Aboriginal land councils, Aboriginal development corporations, and Indigenous communities being supported through access to information that informs investment in broadacre cropping, capacity building, and other identified needs. The scientific and commercial communities accessing trusted information from the project’s trials. The Northern Territory cotton industry having access to tailored training materials for ongoing reference and capacity building. Publications Scoping mushroom cultivation in the Northern Territory: Applying a circular economy approach https://www.sciencedirect.com/science/article/pii/S294975072500104X Challenges and prospects of cotton farming in the tropics: lessons for northern Australia https://link.springer.com/article/10.1186/s42397-025-00249-7

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