Population fluctuations of Dacus ciliatus (Diptera: Tephritidae) on cucumber
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عنوان دوره: سومین کنگره بین المللی حشره شناسی ایران
نویسندگان
1Department of Plant Protection, College of Agriculture and Natural Resources, Razi University, Kermanshah, Iran
2Department of Plant Protection, College of Agriculture and Natural Resources, Razi University, Kermanshah, Iran,
3Department of Plant Protection, Agricultural and Natural Resources Research and Education Center of Kermanshah, Kermanshah, Iran,
چکیده
The cucurbit crops are important vegetables in Iran. Several pests and diseases reduce the yield of these summer crops. Dacus ciliatus Loew (Diptera: Tephritidae) is one of the most important pests in cucurbitacae family and damages fruits directly. Population dynamics and spatial distribution of this pest were studied using Mcphail traps baited with sugar beet molasses and hydrolyzed protein (3%) to catch adult flies in a cucumber field in Kermanshah during summer and fall, 2018. Trap catches were recorded weekly and data collected in different treatments at various sampling dates was used to draw population fluctuations. The Iwao's regression index and Taylor’s Power law were employed to evaluate spatial distribution of the pest adult stage. Analyses of variance followed by least significant difference (LSD) tests were computed to test for differences in numbers of flies captured. A probability level of 0.01 was used as the significance criterion for all statistical tests. Results revealed that the adult population fluctuations did not follow the same pattern in different treatments and sampling dates. The highest and the lowest populations were observed in October and July with records of 36.3 and 0.5 adult flies / trap / week, respectively. Both sexes were active in the field and the sex ratio was 0.63 female and 0.37 male. Both Iwao's regression index and Taylor's Power law proved that the D. ciliatus adult spatial distribution was cumulative; however, the data was fitted by Iwao's regression index with higher accuracy compared with that of Taylor's Power. Results could be used in integrated management of this pest.
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