Lablab was grown in two field experiments at Narrabri, NSW.

Has the introduction of Bt genes into the cotton plant affected its capacity for compensation after insect damage? This question is relevant for three reasons.

Heliothis armigera has been a growing problem for many years, While the cotton producers have borne the brunt of it, reports of increasing damage to crops such as pulses, sorghum an maize have become more frequent.

Organophosphate insecticides are valuable insecticides used to control Helicoverpa armigera on cotton in Australia. Organophosphates most commonly used for Helicoverpa spp.

Water use efficiency is a key issue for the Australian cotton industry. For the individual producer the focus is to maximise returns from a limited resource.