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http://dx.doi.org/10.5656/KSAE.2009.48.4.541

Effects of Temperature on the Development and Longevity of the Gray Field Slug, Deroceras reticulatum Müller (Stylommatophora: Limacidae)  

Kim, Hyun-Ju (Dept. of Functional Crop, Nat. Inst. of Crop Science, RDA)
Bae, Soon-Do (Dept. of Functional Crop, Nat. Inst. of Crop Science, RDA)
Lee, Geon-Hwi (Dept. of Rice and Winter Cereal Crop, Nat. Inst. of Crop Science, RDA)
Yoon, Young-Nam (Dept. of Functional Crop, Nat. Inst. of Crop Science, RDA)
Park, Sung-Tae (Dept. of Functional Crop, Nat. Inst. of Crop Science, RDA)
Choi, Byeong-Ryeol (Dept. of Functional Crop, Nat. Inst. of Crop Science, RDA)
Park, Chung-Gyoo (Research Institute of Life Science, Gyeongsang National University)
Publication Information
Korean journal of applied entomology / v.48, no.4, 2009 , pp. 541-546 More about this Journal
Abstract
The egg size and weight of the gray field slug, Deroceras reticulatum Muller, was $1.91{\times}2.19$ mm and 3.3 mg at $24^{\circ}C$, respectively. Its weight increased from newly laid eggs to adults for 17 weeks at four temperature regimes and was heaviest at $20^{\circ}C$, followed by 24, 16 and $28^{\circ}C$. Likewise, hatching rate of the egg batches was highest with 95% at $20^{\circ}C$, followed by 24, 16 and $28^{\circ}C$ with significant differences. The number of eggs in the batches was increased with 20 at $20^{\circ}C$ while it was only 10 at $28^{\circ}C$. The average accumulated egg-laying days was longest with 15 days at $20^{\circ}C$ while shortest with 9 days at $24^{\circ}C$. The range of egg-laying period was shortest with 84-134 days at $16^{\circ}C$ and longest at $20^{\circ}C$. Thus, the total number of eggs laid by adult D. reticulatum was highest with 217 at $20^{\circ}C$ and lowest with 105 at $16^{\circ}C$. The egg period was 12-19 days while the juvenile period and adult longevity were 51-68 days and 85-134 days, respectively. The life span of D. reticulatum from egg to adult was longest with 216 days at $20^{\circ}C$, followed by 193 days at $24^{\circ}C$, 170 days at $16^{\circ}C$ and 151 days at $28^{\circ}C$. Accordingly, the most favorable temperature for the oviposition, development and longevity of D. reticulatum is $20^{\circ}C$.
Keywords
Deroceras reticulatum; Temperature; Development; Oviposition; Longevity;
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