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      Effect of caffeic acid on feeding, α-amylase and protease activities and allatostatin—A content of Egyptian cotton leafworm, Spodoptera littoralis (Lepidoptera: Noctuidae)—

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          Abstract

          Efficiency of caffeic acid (CA) on Spodoptera littoralis was investigated. CA was mixed with artificial diet, and feeding indices and allatostatin-A (AST-A) content of the midgut were measured 10 days later. α-Amylase and protease activities were evaluated for 10 days. CA significantly decreased feeding indices. Feeding on an artificial diet containing CA decreased protease and α-amylase activities in the midgut. The incubation of the dissected midgut with AST-A increased α-amylase and protease activities. The injection of AST-A into the hemolymph of larvae also increased protease and α-amylase activities. Competitive ELISA and immunohistochemistry results showed that starvation decreased the AST-A titer and AST-A immunoreactivity (AST-A-ir) cells in the midgut whereas refeeding increased it. Here, for the first time we showed that feeding on an artificial diet containing CA also caused the AST-A level to decrease in the midgut, which itself caused α-amylase and protease activities to decrease.

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          Author and article information

          Journal
          J Pestic Sci
          J Pestic Sci
          jps
          Journal of Pesticide Science
          Pesticide Science Society of Japan (2-28-10 Nakazato, Kita-ku, Tokyo 114-0015, Japan )
          1348-589X
          1349-0923
          20 May 2018
          : 43
          : 2
          : 73-78
          Affiliations
          [1 ]Department of Entomology, Faculty of Agriculture, Tarbiat Modares University
          Author notes
          [*]To whom correspondence should be addressed. E-mail: a.mikani@ 123456modares.ac.ir
          Article
          PMC6140692 PMC6140692 6140692
          10.1584/jpestics.D17-086
          6140692
          30363153
          238fe9e8-0471-4475-a61c-2bb516f6d364
          © 2018 Pesticide Science Society of Japan
          History
          : 29 November 2017
          : 8 January 2018
          Categories
          Original Article

          allatostatin-A,digestive enzymes,Egyptian cotton leafworm,caffeic acid

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