Abstract
The Diabrotica speciosa (Germar) (Coleoptera: Chrysomelidae) is an important pest for several crops. The purpose of this work was to improve the method of rearing corn rootworm in lab conditions. Four systems were compared for rearing larvae, two with transference and two without transferring the larvae, constituted by maize seedling kept in peat and vermiculite. The following biological parameters were assessed: duration and feasibility in the adult-larva period, pre-oviposition and oviposition periods, males and females longevity, fertility and feasibility, net reproduction rate (Ro), average duration of a generation in weeks (T), innate capacity to increase in number (rm) and increase finite rate (λ) of D. speciosa adults. Based on the results obtained, it could be noticed that there was no influence of the substrates and rearing techniques used in the pre-oviposition and oviposition periods, males and females longevity and also in the whole fertility. However, there was effect on larval feasibility, where a higher feasibility was obtained in the treatment without transferring and with transference when peat and vermiculite were used as substrates, respectively; a bigger duration of the adult-larva period when the insects were reared in vermiculite substrate, regardless the transference; and in the feasibility of the eggs, which was higher in the treatment without transference for the two substrates. The results of the fertility table indicated that the reproduction potential of the D. speciosa significantly increases when the larvae are reared in peat without transference and vermiculite with transference.
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Claims 8
Claim · model-written summary
Substrate and transfer technique did not influence pre-oviposition and oviposition periods.
- Treatment
- substrates and rearing techniquese0
- Outcome
- pre-oviposition and oviposition periodse0
- Direction
- no influencee0
- Comparator
- substrates and rearing techniquese0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no influence of the substrates and rearing techniques used in the pre-oviposition and oviposition periods”
e1“maize seedling kept in peat and vermiculite”
Claim · model-written summary
Substrate and transfer technique did not influence adult longevity or overall fertility.
- Treatment
- substrates and rearing techniquese0
- Outcome
- males and females longevity and also in the whole fertilitye0
- Direction
- no influencee0
- Comparator
- substrates and rearing techniquese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no influence of the substrates and rearing techniques used in the pre-oviposition and oviposition periods, males and females longevity and also in the whole fertility.”
e1“maize seedling kept in peat and vermiculite”
Claim · model-written summary
Without transfer, peat yielded higher larval feasibility.
- Treatment
- treatment without transferringe0
- Outcome
- larval feasibilitye0
- Direction
- highere0
- Qualifier
- peate0
- Comparator
- with transferencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was effect on larval feasibility, where a higher feasibility was obtained in the treatment without transferring and with transference when peat and vermiculite were used as substrates, respectively”
e1“maize seedling kept in peat and vermiculite”
Claim · model-written summary
With transfer, vermiculite yielded higher larval feasibility.
- Treatment
- with transferencee0
- Outcome
- larval feasibilitye0
- Direction
- highere0
- Qualifier
- vermiculitee0
- Comparator
- treatment without transferringe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was effect on larval feasibility, where a higher feasibility was obtained in the treatment without transferring and with transference when peat and vermiculite were used as substrates, respectively”
e1“maize seedling kept in peat and vermiculite”
Claim · model-written summary
Vermiculite lengthened the adult to larva period regardless of transfer.
- Treatment
- vermiculite substratee0
- Outcome
- duration of the adult-larva periode0
- Direction
- biggere0
- Qualifier
- regardless the transferencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a bigger duration of the adult-larva period when the insects were reared in vermiculite substrate, regardless the transference”
e1“maize seedling kept in peat and vermiculite”
Claim · model-written summary
Without transfer, egg feasibility was higher for both substrates.
- Treatment
- treatment without transferencee0
- Outcome
- feasibility of the eggse0
- Direction
- highere0
- Qualifier
- for the two substratese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“feasibility of the eggs, which was higher in the treatment without transference for the two substrates.”
e1“maize seedling kept in peat and vermiculite”
Claim · model-written summary
Larval rearing in peat without transfer significantly increased D. speciosa reproduction potential.
- Treatment
- peat without transferencee0
- Interactor
- D. speciosa
Diabrotica speciosae0pest - Outcome
- reproduction potential of the D. speciosae0
- Direction
- increasese0
- Comparator
- vermiculite with transferencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reproduction potential of the D. speciosa significantly increases when the larvae are reared in peat without transference and vermiculite with transference.”
e1“maize seedling kept in peat and vermiculite”
Claim · model-written summary
Larval rearing in vermiculite with transfer significantly increased D. speciosa reproduction potential.
- Treatment
- vermiculite with transferencee0
- Interactor
- D. speciosaDiabrotica speciosae0pest
- Outcome
- reproduction potential of the D. speciosae0
- Direction
- increasese0
- Comparator
- peat without transferencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reproduction potential of the D. speciosa significantly increases when the larvae are reared in peat without transference and vermiculite with transference.”
e1“maize seedling kept in peat and vermiculite”
The same questions in other papers
growing medium · pest · Zea mays (maize)Positive and negative results
1 paper in the same direction as this paper · 5 reporting no difference from an alternative
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.