Utilizing the assassin bug, Pristhesancus plagipennis (Hemiptera: Reduviidae), as a biological control agent within an integrated pest management programme for Helicoverpa spp. (Lepidoptera: Noctuidae) and Creontiades spp. (Hemiptera: Miridae) in cotton

• Published in: Bulletin of entomological research Vol. 97; no. 3; pp. 281 - 290
• Main Author: Grundy, P.R.
• Format: Journal Article
• Language: English
• Published: Cambridge, UK Cambridge University Press 01.06.2007
• Subjects: Animals; Biological and medical sciences; biological control agents; Control; cotton; Creontiades; crop yield; Fundamental and applied biological sciences. Psychology; Gossypium; Gossypium - parasitology; Helicoverpa; Hemiptera; Heteroptera; insect control; insecticide compatibility; Insecticides; Integrated pest control; integrated pest management; inundative; inundative release; Larva; Lepidoptera; mass release; Miridae; mirids; Moths; Noctuidae; Nymph; Pest Control, Biological; pesticide use reduction; Phytopathology. Animal pests. Plant and forest protection; predators; predatory insects; Protozoa. Invertebrates; Reduviidae; toxicity; Queensland; inundative; predators; mass release; mirids; Malvaceae; Insecticide; Insecta; Biological control; Pesticides; Fiber crop; Heteroptera; Miridae; Pest; Entomophagous; Beneficial animal; Arthropoda; Dicotyledones; Angiospermae; Lepidoptera; Spermatophyta; Gossypium hirsutum; Noctuidae; Predator; Invertebrata; Compatibility; Integrated pest management; Reduviidae
• ISSN: 0007-4853; 1475-2670
• DOI: 10.1017/S0007485307004993

Helicoverpa spp. and mirids, Creontiades spp., have been difficult to control biologically in cotton due to their unpredictable temporal abundance combined with a cropping environment often made hostile by frequent usage of broad spectrum insecticides. To address this problem, a range of new generation insecticides registered for use in cotton were tested for compatibility with the assassin bug, Pristhesancus plagipennis (Walker), a potential biological control agent for Helicoverpa spp. and Creontiades spp. Indoxacarb, pyriproxifen, buprofezin, spinosad and fipronil were found to be of low to moderate toxicity on P. plagipennis whilst emamectin benzoate, abamectin, diafenthiuron, imidacloprid and omethaote were moderate to highly toxic. Inundative releases of P. plagipennis integrated with insecticides identified as being of low toxicity were then tested and compared with treatments of P. plagipennis and the compatible insecticides used alone, conventionally sprayed usage practice and an untreated control during two field experiments in cotton. The biological control provided by P. plagipennis nymphs when combined with compatible insecticides provided significant (P<0.001) reductions in Helicoverpa and Creontiades spp. on cotton and provided equivalent yields to conventionally sprayed cotton with half of the synthetic insecticide input. Despite this, the utilization of P. plagipennis in cotton as part of an integrated pest management programme remains unlikely due to high inundative release costs relative to other control technologies such as insecticides and transgenic (Bt) cotton varieties.