Orthoptera Austroicetes cruciata plague Defoliates (Gregg, 1997). grasshopper Acrididae Brachyexarna lobipennis Striped winged Defoliates (Gregg, 1997). meadow grasshopper Chortoicetes terminifera Australian Defoliates (Gregg, 1997). plague locust Locusta migratoria Migratory Defoliates (Gregg, 1997). locust Nomadacris guttulosa Spur throated Defoliates (Gregg, 1997). locust Phaulacridium vittatutum Wingless Defoliates 1997). grasshopper Gryllidae Teleogryllus commodus field selectively on young foliage of valuable cricket introduced species. Leads to change in pasture composition and weed invasion. Perennial pastures are less susceptible than annual. Crickets are also a major cause of seed removal (Gregg, 1997). Ants Problem is most severe for surface sowings. Ants have been reported to remove up to half the sown seed prior to emergence (Scott, 1997). Slugs May be a problem in protected drill rows in the slots from direct drilling (Scott, 1997; Burnett, 2006b). Weevils 7 – 2005; 2006). Common Name Scientific Name Environmental Factors Symptoms High surface moisture, Very primitive plant that is Algae Many algal species inadequate drainage and bluishblack in colour and
Orthoptera Acrididae Austroicetes cruciata plague grasshopper Defoliates (Gregg, 1997). Brachyexarna lobipennis Striped winged meadow grasshopper Defoliates (Gregg, 1997). Chortoicetes terminifera Australian plague locust Defoliates (Gregg, 1997). Locusta migratoria Migratory locust Defoliates (Gregg, 1997). Nomadacris guttulosa Spur throated locust Defoliates (Gregg, 1997). Phaulacridium vittatutum Wingless grasshopper Defoliates 1997). Gryllidae Teleogryllus commodus field cricket selectively on young foliage of valuable introduced species. Leads to change in pasture composition and weed invasion. Perennial pastures are less susceptible than annual. Crickets are also a major cause of seed removal (Gregg, 1997). Ants Problem is most severe for surface sowings. Ants have been reported to remove up to half the sown seed prior to emergence (Scott, 1997). Slugs May be a problem in protected drill rows in the slots from direct drilling (Scott, 1997; Burnett, 2006b). Weevils 7 – 2005; 2006). Common Name Scientific Name Environmental Factors Symptoms Algae Many algal species High surface moisture, inadequate drainage and Very primitive plant that is bluishblack in colour and