Contact Toxicity of Insecticides Applied to Fall Cankerworm Reared on Artificial Diet1

Lyon, Robert L.; Brown, Sylvia J.

doi:10.1093/jee/63.6.1970

Cited by 8 publications

(1 citation statement)

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“…The diet for H. talaca was formulated following Lyon & Brown (1970) who developed a successful diet for fall cankerworm, Alsophila pometaria (Lepidoptera: Geometridae). Diet preparation mainly followed the method recommended by Cohen (2004).…”

Section: Diet Managementmentioning

confidence: 99%

Fitness traits of the tea defoliator,Hyposidra talaca(Walker 1860) (Lepidoptera: Geometridae) on natural and artificial diets in relation to gut enzymes and nutritional efficiencies

Prasad

Mukhopadhyay

2015

Annales de la Société entomologique de France (N.S.)

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The looper pest Hyposidra talaca (Walker 1860) is known to cause heavy damage to tea plantations in NorthEast India, including Darjeeling Terai-Dooars, by defoliating the bushes. Laboratory rearing of this looper species resulted in production of a healthy population under controlled conditions (aseptic) for three consecutive generations on a newly formulated artificial diet. The performance and fitness traits of the looper species were compared on natural (tea-leaf) and artificial diets along with the quantity of its hydrolytic (amylase, protease, lipase) and detoxifying enzymes [general esterase (GE), glutathione S-transferase (GST)] when reared on these two diets. Activity of protease on the artificial diet was significantly higher than that on the natural diet; however, lipase showed only marginally increased activity on the former diet. When detoxifying enzymes such as general esterase (GE) and glutathione S-transferase (GST) were observed, they were found to be significantly higher on the natural diet. Such variations in the hydrolytic enzymes and detoxifying enzymes indicated a better capacity of the looper to utilize the artificial diet than the tea-leaf diet. The finding was further corroborated by the higher efficiencies (ECI and ECD) and production index (PI) that were recorded on the artificial diet, compared to higher maintenance cost on the tea-leaf diet. The artificial diet also supported a high survival rate of H. talaca in all generations along with higher adult emergence and fecundity. The newly designed artificial diet is a viable alternative for mass rearing and efficient production of control populations of H. talaca under sterile conditions. Résumé. Traits de l'aptitude de la défoliatrice du thé Hyposidra talaca (Walker 1860) (Lepidoptera : Geometridae) sur diètes naturelles et artificielles en relation avec les enzymes digestives et l'efficacité alimentaire. La chenille arpenteuse Hyposidra talaca (Walker 1860) est connue pour cause de gros dégâts par défoliation aux plantations de thé du nord-est de l'Inde, y compris la région du Darjeeling Terai-Dooars. L'élevage de cette chenille arpenteuse a résulté dans la production d'une population saine en conditions contrôlées (aseptique) durant trois générations successives, grâce à une nouvelle formule de diète. Les traits d'aptitude et de performance de la chenille ont été comparées sur diètes naturelle (feuilles de thé) et artificielles. Durant cette expérience, on a mesuré les concentrations en enzymes hydrolytiques (amylase, protéase, lipase) et détoxifiantes (general esterase, GE; glutathione S-transferase, GST) en comparant les deux diètes. L'activité de protéase sur la diète artificielle a été significativement plus haute que sur la diète naturelle. Toutefois, la lipase n'a montré qu'une activité marginalement augmentée dans la même situation. EN ce qui concerne les enzymes de détoxification comme la general esterase (GE) et la glutathione S-transferase (GST), elles ont été plus significativement plus actives sur la diète naturelle. De tel...

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Section: Diet Managementmentioning

confidence: 99%