Feeding characteristics of Calliptamus italicus L.of different instars and genders in the Yamalik Mountain,Xinjiang,China
This study aims to elucidate the feeding habits of Calliptamus italicus L.at all instars under natural conditions.The feeding tendencies of C.italicus nymphs in Yamalike Mountain were studied through crop microanalysis in 2021,and the feeding selectivity was calculated using Ivlev's selection index.The differences in instars and feeding habits between genders were clarified,and the potential for intraspecific competition was revealed through niche analysis.The results showed that the nymphs of C.italicus exhibited the capacity to feed on 9 types of plants belonging to 5 families under natural conditions.The 1st to 3rd instar nymphs feed on a maximum of seven species,and the number of plant species fed on by nymphs of the 4th to 6th instars decreased gradually.The nymphs exhibited a preference for dicotyledons,with a particular inclination for plants belonging to the Asteraceae and Chenopodiaceae families.The majority of locust nymphs were observed to feed actively on Artemisia sieversiana Ehrh.ex Willd.,Seriphidium kaschgaricum(Krasch.)Poljak.,and Bassia prostrata(L.)Beck.Furthermore,the 1st to 5th instar nymphs will randomly feed on Krascheninnikovia ceratoides(L.)Gueldenst..Some of the nymphs were observed to feed passively on Arctium lappa L.,Nanophyton erinaceum(Pall.)Bunge,Psathyrostachys juncea(Fisch.)Nevski,and Galium spurium L..The 1st and 3rd instar locusts exhibited a clear preference for S.kaschgaricum,while the 2nd and 5th instar locusts favored B.prostrata,and 4th and 6th instar locusts displayed a marked predilection for A.sieversiana.No significant differences were observed in the feeding behavior of the 9 plant species between male and female nymphs of the 1st and 2nd instars.However,a significant gender difference was evident in the feeding behavior of the 3rd,4th,and 5th instar nymphs,with males and females showing distinct preferences for A.sieversiana,S.kaschgaricum,and K.ceratoides.There was a potential competition between the sexes in the 1st and 5th instars.A potential competition was identified between the 5th instar nymphs and the other instar nymphs.
XinjiangCalliptamus italicus L.locust nymphscrop microanalysisfeeding habits
NETL
NSTL
万方数据
