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Demographic comparison of sweetpotato weevil reared on a major host, Ipomoea batatas, and an alternative host, I. triloba.

Reddy GV, Chi H - Sci Rep (2015)

Bottom Line: We found that C. formicarius developed faster on I. batatas than on I. triloba.The fecundity of females was 90.0 eggs on I. batatas significantly higher than the mean fecundity of 68.5 eggs on I. triloba.Although this insect has a higher intrinsic rate of increase on I. batatas, the study indicated that C. formicarius can successfully survive and reproduce on both host plants.

View Article: PubMed Central - PubMed

Affiliation: Western Triangle Agricultural Research Center, Montana State University, 9546 Old Shelby Rd., P. O. Box 656, Conrad, MT 59425, USA.

ABSTRACT
In this study, we collected life table data for the sweetpotato weevil, Cylas formicarius, grown on Ipomoea batatas and Ipomoea triloba, and analyzed them using an age-stage, two-sex life table. We also demonstrated the growth potential of C. formicarius on these two host plants by using population projection. These data will be useful to the growers to the selection or eradication of host plants in an integrated control strategy for C. formicarius for the entire area of the targeted areas. We found that C. formicarius developed faster on I. batatas than on I. triloba. The developmental times of the larval and pupal stages on I. batatas than on I. triloba were 37.01 and 8.3 days. The adult females emerged before and began to produce eggs at 42 days earlier when reared on I. batatas. The fecundity of females was 90.0 eggs on I. batatas significantly higher than the mean fecundity of 68.5 eggs on I. triloba. Although this insect has a higher intrinsic rate of increase on I. batatas, the study indicated that C. formicarius can successfully survive and reproduce on both host plants.

No MeSH data available.


Reproductive value of Cylas formicarius on sweet potato Ipomoea batatas (A) and morning glory Ipomoea triloba (B).
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f4: Reproductive value of Cylas formicarius on sweet potato Ipomoea batatas (A) and morning glory Ipomoea triloba (B).

Mentions: The longevity of the C. formcarius at age zero (e01) was 135.63 d on I. batatas, which did not differ significantly from the longevity of 134.68 d on I. triloba (Fig. 3). These were exactly the mean longevity of all individuals used in the life table study. At age zero, the reproductive values (v01) were exactly the same as the finite rates on both host plants, i.e., 1.0663 d−1 on I. batatas and 1.0426 d−1 on I. triloba (Fig. 4). The value of vxj on I. batatas jumped to 45.5 d−1 at 42 d when female adults emerged; when reared on I. triloba, the vxj value jumped to 54.93 d−1 when female emerged later at 60 d.


Demographic comparison of sweetpotato weevil reared on a major host, Ipomoea batatas, and an alternative host, I. triloba.

Reddy GV, Chi H - Sci Rep (2015)

Reproductive value of Cylas formicarius on sweet potato Ipomoea batatas (A) and morning glory Ipomoea triloba (B).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4496664&req=5

f4: Reproductive value of Cylas formicarius on sweet potato Ipomoea batatas (A) and morning glory Ipomoea triloba (B).
Mentions: The longevity of the C. formcarius at age zero (e01) was 135.63 d on I. batatas, which did not differ significantly from the longevity of 134.68 d on I. triloba (Fig. 3). These were exactly the mean longevity of all individuals used in the life table study. At age zero, the reproductive values (v01) were exactly the same as the finite rates on both host plants, i.e., 1.0663 d−1 on I. batatas and 1.0426 d−1 on I. triloba (Fig. 4). The value of vxj on I. batatas jumped to 45.5 d−1 at 42 d when female adults emerged; when reared on I. triloba, the vxj value jumped to 54.93 d−1 when female emerged later at 60 d.

Bottom Line: We found that C. formicarius developed faster on I. batatas than on I. triloba.The fecundity of females was 90.0 eggs on I. batatas significantly higher than the mean fecundity of 68.5 eggs on I. triloba.Although this insect has a higher intrinsic rate of increase on I. batatas, the study indicated that C. formicarius can successfully survive and reproduce on both host plants.

View Article: PubMed Central - PubMed

Affiliation: Western Triangle Agricultural Research Center, Montana State University, 9546 Old Shelby Rd., P. O. Box 656, Conrad, MT 59425, USA.

ABSTRACT
In this study, we collected life table data for the sweetpotato weevil, Cylas formicarius, grown on Ipomoea batatas and Ipomoea triloba, and analyzed them using an age-stage, two-sex life table. We also demonstrated the growth potential of C. formicarius on these two host plants by using population projection. These data will be useful to the growers to the selection or eradication of host plants in an integrated control strategy for C. formicarius for the entire area of the targeted areas. We found that C. formicarius developed faster on I. batatas than on I. triloba. The developmental times of the larval and pupal stages on I. batatas than on I. triloba were 37.01 and 8.3 days. The adult females emerged before and began to produce eggs at 42 days earlier when reared on I. batatas. The fecundity of females was 90.0 eggs on I. batatas significantly higher than the mean fecundity of 68.5 eggs on I. triloba. Although this insect has a higher intrinsic rate of increase on I. batatas, the study indicated that C. formicarius can successfully survive and reproduce on both host plants.

No MeSH data available.