This study is summarised as evidence for the following.

Action Category

Water primrose: Biological control using co-evolved, host specific herbivores

Action Link
Control of Freshwater Invasive Species
  1. Water primrose: Biological control using co-evolved, host specific herbivores

    A controlled, replicated field study carried out in 1985 in Jiangxi Agricultural University, China (Xiao-Shui 1990) found the flea beetle Altica cyanea caused heavy feeding destruction to the prostrate water primrose Ludwigia prostrata and was specific to the prostrate water primrose and Indian toothcup Rotala indica. In field cage experiments, flea beetles decimated prostrate water primrose plants within a month.  Wooden frame field cages were covered with nylon mesh on the sides and a mesh window on the top.  One hundred prostrate water primrose seedlings were planted per cage.  Flea beetle adults were collected from the field and zero, two, four, and eight pairs of them were released at random into each cage when young caged plants had at least nine leaves.  There were three replicates of each population size on the plants.  Observations were made at 10 day intervals.  To test food specificity, laboratory-based larval starvation tests were carried out on 24 different plant species at temperatures of 20-30OC.

Output references
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