scholarly journals Stemphylium Solani Stabilized the Physicochemical Characteristics of Host Plant Species During Stress

Author(s):  
Ismail Ismail ◽  
Muhammad Hamayun ◽  
Anwar Hussain ◽  
Amjad Iqbal ◽  
Sumera Khan ◽  
...  
Author(s):  
Marcin W. Zielonka ◽  
Tom W. Pope ◽  
Simon R. Leather

Abstract The carnation tortrix moth, Cacoecimorpha pronubana (Hübner, [1799]) (Lepidoptera: Tortricidae), is one of the most economically important insect species affecting the horticultural industry in the UK. The larvae consume foliage, flowers or fruits, and/or rolls leaves together with silken threads, negatively affecting the growth and/or aesthetics of the crop. In order to understand the polyphagous behaviour of this species within an ornamental crop habitat, we hypothesized that different host plant species affect its life history traits differently. This study investigated the effects of the host plant species on larval and pupal durations and sizes, and fecundity (the number of eggs and the number and size of egg clutches). At 20°C, 60% RH and a 16L:8D photoperiod larvae developed 10, 14, 20 and 36 days faster when reared on Christmas berry, Photinia (Rosaceae), than on cherry laurel, Prunus laurocerasus (Rosaceae), New Zealand broadleaf, Griselinia littoralis (Griseliniaceae), Mexican orange, Choisya ternata (Rutaceae), and firethorn, Pyracantha angustifolia (Rosaceae), respectively. Female pupae were 23.8 mg heavier than male pupae, and pupal weight was significantly correlated with the duration of larval development. The lowest and the highest mean numbers of eggs were produced by females reared on Pyracantha (41) and Photinia (202), respectively. Clutch size differed significantly among moths reared on different host plants, although the total number of eggs did not differ. This study showed that different ornamental host plants affect the development of C. pronubana differently. Improved understanding of the influence of host plant on the moth's life history parameters measured here will help in determining the economic impact that this species may have within the ornamental plant production environment, and may be used in developing more accurate crop protection methodologies within integrated pest management of this insect.


2020 ◽  
Vol 168 (12) ◽  
pp. 900-910
Author(s):  
Eduardo G. Virla ◽  
María B. Aguirre ◽  
Guido A. Van Nieuwenhove ◽  
Erica B. Luft Albarracin ◽  
Guillermo A. Logarzo

2008 ◽  
Vol 140 (2) ◽  
pp. 192-202 ◽  
Author(s):  
Gaylord A. Desurmont ◽  
Paul A. Weston

AbstractExperiments were conducted under laboratory conditions to determine the influence of the relative sizes of predator and prey, temperature, presence of refugia, size of the search area, and host-plant species on the predation performance of Podisus maculiventris (Say) nymphs against viburnum leaf beetle, Pyrrhalta viburni (Paykull), a new landscape pest in North America that feeds on the foliage of species of Viburnum L. (Caprifoliaceae). Predator handling time was positively correlated with body mass of the prey for all instars of P. maculiventris, but the rate of increase of handling time relative to prey mass decreased as predator age increased. Temperature was positively correlated with predation rates, but the presence of refugia did not have an impact on predation. The influence of host-plant species and size of the search area was tested on southern arrowwood (Viburnum dentatum L.) and American cranberrybush (Viburnum opulus L. var. americanum Aiton). There was a significant interaction between plant species and size of the search area, the species effect becoming significant as leaf surface area increased. In the case of southern arrowwood a negative correlation between size of the search area and predation rate was also detected. The identification of these factors adds valuable knowledge for using P. maculiventris as a biological-control agent against P. viburni.


2004 ◽  
Vol 164 (2) ◽  
pp. 337-346 ◽  
Author(s):  
Claudia G. León-Ramírez ◽  
José Luis Cabrera-Ponce ◽  
Alfredo D. Martínez-Espinoza ◽  
Luis Herrera-Estrella ◽  
Lucila Méndez ◽  
...  

2019 ◽  
Author(s):  
Ivan Andreevich Kerchev

Stridulatory signals are involved in conspecific interactions between bark beetles (Coleoptera: Curculionidae, Scolytinae). In this study, we compared the qualitative profiles of acoustic signals in three species from the genus Polygraphus Er. Sympatry can be periodically observed in two of them – P. proximus and P. subopacus. Sporadically they occur on the same plants. P. nigrielytris colonize distinctly different host plant species; however, on the island of Sakhalin it inhabits the same biotopes. The purpose of the study is to identify species-specific parameters and the extent of differences in stridulatory signals of these species. Airborne signals produced during the contact of males of the same species were experimentally recorded. Among tested parameters of stridulatory signals, as the most species-specific were noted: chirp duration, interchirp interval, number of tooth-strikes per chirp, and intertooth-strike interval.


Oecologia ◽  
2018 ◽  
Vol 186 (4) ◽  
pp. 995-1005 ◽  
Author(s):  
Ryosuke Nakadai ◽  
Koya Hashimoto ◽  
Takaya Iwasaki ◽  
Yasuhiro Sato

Zootaxa ◽  
2020 ◽  
Vol 4802 (2) ◽  
pp. 317-334
Author(s):  
GAMZE KARACA ◽  
YUSUF KATILMIŞ

Field surveys were carried out to determine the richness of the Cynipidae fauna of Kazdağı National Park, located on the border of Edremit county (Balıkesir province, Turkey). Gall samples of cynipids were collected or photographed on Quercus and Rosa host plants. As a result, 53 cynipid species belonging to 3 different tribes were found or observed in the surveyed area. 14 and 8 species were recorded as new for the Cynipidae fauna of Balıkesir and Çanakkale provinces respectively, including the first locality record of Andricus hystrix Trotter, 1897 for Turkey. In addition, color photos of reared cynipid wasps from their galls and the observed cynipid galls on their host plant species are presented. 


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