master's thesis
Seksualni indeks i fertilitet ženki proljetnih repičinih pipa

Ivana Puljan (2016)
Sveučilište u Zagrebu
Agronomski fakultet
Fitopatologija
Metadata
TitleSeksualni indeks i fertilitet ženki proljetnih repičinih pipa
AuthorIvana Puljan
Mentor(s)Tanja Gotlin Čuljak (thesis advisor)
Abstract
Velika repičina pipa (Ceutorhynchus napi Gyllenhal, 1837) i mala repičina pipa (Ceutorhynchus pallidactylus Marsham, 1802) postaju sve značajniji štetnici u usjevima uljane repice (Brassica napus L. ssp. oleifera). Biologija i ekologija velike i male repičine pipe vrlo su slične pa se često navode kao kompleks štetnika, ali njihovi životni ciklusi se ipak razlikuju što uvjetuje i različit pristup suzbijanju. Cilj ovog rada je odrediti seksualni indeks velike i male repičine pipe te utvrditi fertilitet ženki obje vrste, a temeljem dobivenih rezultata moći će se utvrditi trenutak u kojem ženke nose zrela jaja te na taj način odrediti optimalni rok primjene insekticida. Istraživanje je provodeno 2016. godine na lokalitetu Šašinovec u razdoblju od početka veljače do kraja svibnja. Dinamika populacije odraslih oblika pratila se pomoću žutih posuda, a uzorci su uzimani prosječno dva puta tjedno. Odrasli oblici velike repičine pipe javili su se u značajno većem broju u odnosu na odrasle oblike male repičine pipe, a prva pojava ženki kod obje vrste, zabilježena je tri tjedna nakon prve pojave mužjaka. Prve ženke sa zrelim jajima u trbušnoj šuPljini, kod obje vrste, javljaju se početkom travnja, u fenofazi početka cvatnje uljane repice (BBCH 60 62). Postotak mužjaka, kod obje vrste, bio je veći od ženki, ali bez značajne razlike. Populacija oba štetnika bila je vrlo niska te nije bilo potrebe za primjenom insekticida jer prag odluke nije prijeđen.
KeywordsCeutorhynchus napi Ceutorhynchus pallidactylus fertility sex ratio
Committee MembersTanja Gotlin Čuljak (committee chairperson)
Renata Bažok (committee member)
Dinka Grubišić (committee member)
Ivan Juran (committee member)
GranterSveučilište u Zagrebu
Agronomski fakultet
Lower level organizational unitsFitopatologija
PlaceZagreb
StateCroatia
Scientific field, discipline, subdisciplineBIOTECHNICAL SCIENCES
Agronomy
Study programme typeuniversity
Study levelgraduate
Study programmePhytomedicine
Academic title abbreviationmag. ing. agr.
Genremaster's thesis
Language Croatian
Defense date2016
Parallel abstract (English)
The rape stem weevil (Ceutorhynchus napi Gyllenhal, 1837) and the cabbage stem weevil (Ceutorhynchus pallidactylus Marsham, 1802) are becoming increasingly important pests in crops of oilseed rape (Brassica napus L. ssp. oleifera). Biology and ecology of rape stem weevil (C. napi) and cabbage stem weevil (C. pallidactylus) are very similar, so they often referred to as complex pests, but their life cycles are very different which causes different strategy in pest control. The aim of this study is to determine sex ratio of rape stem weevil and cabbage stem weevil and determine the fertility of females of both species, and results will give us the point at which females are carrying mature eggs and that will help us to get the optimal time for the application of insecticides. The research was conducted in 2016 on the site of Šašinovec in the period form beginning of February to the end of May. Population dynamics of adult forms was followed using yellow traps, and samples were taken twice a week on average. Adults form of rape stem weevil occurred in significantly higher numbers than adults form of cabbage stem weevil, and the first appearance of females in both species was observed three weeks after first appearance of mail. The first females with mature eggs in the abdominal, in both species occur in early April, when the oilseed rape was in the beginning of flowering the stage of development (BBCH 60 62) . The percentage of males, in both species, was higher than females, but with no significant difference. The population of both species was very low, there was no need for the application because the threshold is not exceeded.
Parallel keywords (Croatian)Ceutorhynchus napi Ceutorhynchus pallidactylus fertilitet seksualni indeks
Resource typetext
Access conditionOpen access
Terms of usehttp://rightsstatements.org/vocab/InC/1.0/
URN:NBNhttps://urn.nsk.hr/urn:nbn:hr:204:549872
CommitterValentina Bezek