A network that helps people worldwide obtain rapid advice and information on crop protection, including the identification and management of plant pests.
PestNet is a network that helps people worldwide obtain rapid advice and information on crop protection, including the identification and management of plant pests. It started in 1999. Anyone with an interest in plant protection is welcome to join. PestNet is free and is moderated, ensuring that messages are confined to plant protection.
June 2003. Photos of a locust were sent from Bolivia, and, later (September), a member wrote that there are 30-plus possible species occurring in Bolivia, including some which were reported from neighboring countries.
It is possible that the photos are Chromacris peruviana (Pictet & Saussure 1887) or a closely related Chromacris species. These species are generally of gregarious behaviour, and are herbivorous (preferred host plants are among Solanaceae, but also Compositae, Leguminosae); C. peruviana has caused much damage on several crops in Peru in the past years.
Later, and unconnected with the messages on Chromacris, a member mentioned that the Australian Plague Locust Commission has been using the fungus Metarhizium anisopliae var. acridum against a range of locusts and grasshoppers with very good results. Two Metarhizium products for oil and water-based applications will be registered . The strain of Metarhizium used selectively infects acridids and so is relatively ecologically friendly. The Commission has also been developing “barrier” treatments with conventional insecticides that allow a dramatic reduction in the amount of insecticide needed to control grasshoppers.