Laboratory assays were conducted to determine the effect of temperature on head capsule width of L. botrana (Lepidoptera: Tortricidae). One nonconstant and six constant temperatures were assayed. Temperature significantly affected head capsule size. Head capsules were larger at low temperatures (15–21°C) and smaller at high temperatures (24 and 30°C). Nonconstant temperature and 27°C also produced insects with larger head capsules similar to those ones collected at low temperatures. Five instars were recorded at all temperatures, and no overlap was found between mean head capsule widths; however, an overlap of the ranges of head capsule widths was found between L2 and L3 in larvae reared at 24°C. Growth ratios were also relatively constant. Head capsule growth followed Dyar′s rule. Head capsule width–instar relationship was better described by a second-degree polynomial regression equation.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.