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42 results for “oviposition preference”
Figure 3 in Diceraeus melacanthus (Dallas) (Hemiptera: Pentatomidae) development, preference for feeding and oviposition related to different food sources
Figure 3 Number of stink bugs (means ± SE) per food source associated with the feeding preference (trial 2) of Diceraeus melacanthus adults. Bars represent the average of evaluations performed during 24 and 48 hours. Means followed by the same letter do not differ according to the Tukey test (p ≥ 0.05). Food: soybean seedlings (SS), Commelina benghalensis branches (CbB), maize seedlings (MS), moistened soybean grains (MSG), no food preference (NONE). Analysis performed on data transformed to x + 0.5. nsAnova not significant.
Figure 1 in Diceraeus melacanthus (Dallas) (Hemiptera: Pentatomidae) development, preference for feeding and oviposition related to different food sources
Figure 1 Scheme (not drawn to scale) of the cages used for the oviposition preference experiment (trial 3), depicting the circles inside each cage in which different plants were randomly offered to the stink bugs.
Figure 2 in Diceraeus melacanthus (Dallas) (Hemiptera: Pentatomidae) development, preference for feeding and oviposition related to different food sources
Figure 2 Arena (not drawn to scale) used for the feeding preference experiment (trial 2) of Diceraeus melacanthus between different food sources.
Fig. 3 in Do container size and predator presence affect Culex (Diptera: Culicidae) oviposition preferences?
Fig. 3. Predator abundance per liter as a function of sampling day and container size. The 100 and 200-L barrels are represented by the closed triangles and closed circles, respectively. The open circles represent the 15-L buckets, and asterisks represent the 1-L cups. The bars represent standard error. Different letters indicate different means among the treatments.
Fig. 2 in Do container size and predator presence affect Culex (Diptera: Culicidae) oviposition preferences?
Fig. 2. Numbers of Culex sp. 1 (left) and C. eduardoi (right) egg rafts as a function of sampling day and container size. The 100 and 200-L barrels are represented by closed triangles and closed circles, respectively. The open circles represent the 15-L buckets, and asterisks represent the 1-L cups. The bars represent standard error. Different letters indicate different means among the treatments.
Fig. 1 in Do container size and predator presence affect Culex (Diptera: Culicidae) oviposition preferences?
Fig. 1. Numbers of eggs rafts number as a function of sampling days and container size.The 100 and 200-L barrels are represented by closed triangles and closed circles, respectively. The open circles represent the 15-L buckets, and asterisks represent the 1-L cups. The bars represent standard error. Different letters indicate different means among the treatments.
Fig. 1 in Oviposition preference of rugose spiraling whitefly (Hemiptera: Aleyrodidae) on five host plant species
Fig. 1. Photo showing the cage arrangement. Six cages (1.83 × 1.83 × 1.83 m with 20 × 20 Mesh Lumite) were constructed in a shadehouse in a north-south row. Each cage had 5 potential host plants and a source plant containing adult whiteflies.
Fig. 2 in Oviposition preference of rugose spiraling whitefly (Hemiptera: Aleyrodidae) on five host plant species
Fig. 2. The cumulative number of eggs deposited on different plants during the experiment. The average cumulative number of eggs was always greatest on gumbo limbo.
Fig. 3 in Does prior feeding behavior by previous generations of the maize weevil (Coleoptera: Curculionidae) determine future descendants feeding preference and ovipositional suitability?
Fig. 3. Mean (SE) number of S. zeamais (n = 8,000) attracted to corn, barley, brown rice, and white rice, with a 200 µL Eppendorf tube containing the pheromone lure placed in barley. Means with the same letter are not significantly different.
Fig. 6 in Does prior feeding behavior by previous generations of the maize weevil (Coleoptera: Curculionidae) determine future descendants feeding preference and ovipositional suitability?
Fig. 6. Number (SE) of S. zeamais male and female (n = 200) emergence when reared on the individual host grains: corn, barley, brown rice, and white rice. Means with the same letter are not significantly different.
Fig. 5 in Does prior feeding behavior by previous generations of the maize weevil (Coleoptera: Curculionidae) determine future descendants feeding preference and ovipositional suitability?
Fig. 5. Mean (SE) number of S. zeamais (n = 8,000) attracted to corn, barley, brown rice, and white rice, with a 200 µL Eppendorf tube containing the pheromone lure placed in brown rice. Means with the same letter are not significantly different.
Fig. 2 in Does prior feeding behavior by previous generations of the maize weevil (Coleoptera: Curculionidae) determine future descendants feeding preference and ovipositional suitability?
Fig. 2. Mean (SE) number of S. zeamais (n = 8,000) attracted to corn, barley, brown rice, and white rice, with a 200 µL Eppendorf tube containing the pheromone lure placed in corn. Weevils were reared on corn, barley, brown rice, and white rice, then presented with a choice of 4 host grains. Means with the same letter are not significantly different.
Fig. 1 in Does prior feeding behavior by previous generations of the maize weevil (Coleoptera: Curculionidae) determine future descendants feeding preference and ovipositional suitability?
Fig. 1. Mean (SE) number of S. zeamais (n = 8,000) attracted to corn, barley, brown rice, and white rice. Weevils were reared on corn, barley, brown rice, and white rice, then presented with a choice of 4 host grains. Means with the same letter are not significantly different.
Fig. 4 in Does prior feeding behavior by previous generations of the maize weevil (Coleoptera: Curculionidae) determine future descendants feeding preference and ovipositional suitability?
Fig. 4. Mean (SE) number of S. zeamais (n = 8,000) attracted to corn, barley, brown rice, and white rice, with a 200 µL Eppendorf tube containing the pheromone lure placed in white rice. Means with the same letter are not significantly different.
Oviposition preference and performance of Plutella xylostella are modulated by natural enemies, larval odours and immune status
<p>Insect herbivores frequently must balance host plant quality and the risk of attack by their natural enemies when making oviposition decisions. Yet, which factor is more important remains unresolved in plant-insect ecology. Here, we report the oviposition preference and larval performance of the brassicaceous specialist <em>Plutella xylostella</em>, in the context of plant quality (cabbage <em>Brassica oleracea</em>, vs. mustard <em>B. juncea</em>) and associated natural enemies. <a name="_Hlk95552650"></a>Despite the greater larval weight and adult life-span on cabbage, ovipositing females strongly preferred mustard. Both the egg parasitoid <em>Trichogrammatoidea bactrae</em> and the larval ectoparasitoid <em>Bracon brevicornis</em> are more likely to attack <em>P. xylostella</em> that feed on cabbage; thus, mustard represents enemy-reduced space from these two parasitoids. However, larval diet had no impact on the parasitization rate of specialist <em>Cotesia vestalis</em>. Feeding on mustard improved larval immunity. The total hemocytes number, diversity and phenoloxidase activity was higher on mustard-fed larvae that increased their survival against the entomopathogen, <em>Bacillus thuringiensis. </em>Interestingly, host plants altered the larval body odour profile. Mustard fed larvae emitted allyl isothiocyanate (AITC) and butyl isothiocyanate (BITC) while cabbage fed larvae emitted dimethyl disulphide (DMDS) and dimethyl trisulphide (DMTS) that served as short-range cues for larval parasitoids. For <em>B. brevicornis</em>, host body odour guided oviposition choice was crucial as their fitness was affected by the host larval diet. Although, <em>C. vestalis</em> showed a clear preference towards volatiles emitted by mustard fed larvae, their fitness was unaltered. Taken together, our results illustrate that <em>P. xylostella</em> prefers to lay eggs on mustard plants providing enemy-reduced space from some, but not all, natural enemies.</p>
An advanced metabolomic approach untangles oviposition preference of grape skin by Drosophila suzukii
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Growth rate and oviposition preference of Oc. togoi & Ae. albopictus in salinity stress
<p><em><span>Ochlerotatus togoi</span></em><span><em> </em>is a salt-tolerant euryhaline mosquito that lays its eggs in rock pools. Although it is a pest that transmits flaviviruses and filarial worms to humans, ecological studies have not been actively conducted because of its limited habitat. Rising sea levels have created a favorable environment for <em>Oc. togoi</em> to survive; additionally, the incidence of <em>Oc. togoi</em>-borne diseases may increase with an increase in population of <em>Oc. togoi</em>. We examined oviposition and growth rates in the range of 0–35 psu to obtain ecological data for <em>Oc. togoi</em>. <em>Ochlerotatus togoi</em> exhibited the highest oviposition preference at 0 psu; however, the hatching rate was highest at 10 psu, the pupation rate was highest at 25 psu, and the emergence rate was highest at 5 psu. <em>Ochlerotatus togoi</em> showed the highest rate of growth into adults at 25 psu. The results were verified for statistical significance using Mann–Whitney U and Kruskal–Wallis H tests (post hoc test: Bonferroni), and a regression equation was generated for the incidence of adult <em>Oc. togoi</em> based on the change in salinity (y = −14.318 + 9.821x; y = adult incidence rate; x = salinity). The oviposition habits and developmental conditions of <em>Oc. togoi</em> were confirmed and the number of <em>Oc. togoi </em>was predicted based on the changes in sea level and ocean salinity. The results of this study are expected to be used for controlling salt-tolerant vectors and responding to vector-borne diseases.</span></p>
Plant water limitation and its impact on the oviposition preferences of the monarch butterfly, Danaus plexippus (Lepidoptera: Nymphalidae)
<p>Intensifying drought conditions across the western United States due to global climate change are altering plant-insect interactions. Specialist herbivores must find their host plants within a matrix of nonhosts, and thus often rely upon specific plant secondary chemistry for host location and oviposition cues. Climate-induced alterations to plant chemistry could thus affect female selection of larval food-plants. Here, we investigated whether host-plant water limitation influenced oviposition preference in a threatened invertebrate: the monarch butterfly (<em>Danaus plexippus</em>). We found that females deposited more eggs on reduced-water than on well-watered narrowleaf milkweed plants (<em>Asclepias fascicularis</em>), but we could not attribute this change to any specific change in plant chemistry. Specialist herbivores, such as the monarch butterfly, which are tightly linked to specific plant cues, may experience a shift in preferences under global-change conditions. Understanding oviposition preferences will be important to directing ongoing habitat restoration activities for this declining insect.</p>
Growth rate and oviposition preference of Oc. togoi & Ae. albopictus in salinity stress
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Plant oviposition preferences in a generalist herbivore: Tests of host plant selection and the Hopkins’ host selection principle
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