scholarly journals Ecological Aspects of Pear Psyllid, Cacopsylla pyricola (Hemiptera: Psyllidae), and Its Associated Natural Enemies, as A new Pest on Pear Trees in Egypt

Author(s):  
Youssef S. ◽  
Nadia, Aly ◽  
Shaaban Abd-Rabou
2010 ◽  
Vol 45 (5) ◽  
pp. 442-449 ◽  
Author(s):  
Raúl Alberto Laumann ◽  
Maria Carolina Blassioli Moraes ◽  
Joseane Padilha da Silva ◽  
Afrânio Márcio Corrêa Vieira ◽  
Samantha da Silveira ◽  
...  

The objective of this work was to determine the potential of five species of Scelionidae wasps - Telenomus podisi, Trissolcus basalis, Trissolcus urichi, Trissolcus teretis and Trissolcus brochymenae - as natural enemies of the neotropical stink bug Dichelops melacanthus, and to determine if the presence of eggs of other stink bug species influences the parasitism and development of the parasitoids. Two kinds of experiments were done in laboratory: without choice of hosts (eggs of D. melacanthus) and with choice (eggs of D. melacanthus and of Euschistus heros). Biological parameters, including proportion of parasitism, immature survivorship, progeny sex ratio, immature stage development period, and host preference were recorded. All the evaluated parasitoids can parasitize and develop on D. melacanthus eggs. The first choice of eggs did not influence the proportion of D. melacanthus eggs parasitized by Tr. basalis, Tr. teretis or Tr. brochymenae. However, D. melacanthus eggs as the first choice of Te. podisi and Tr. urichi increased, respectively, 9 and 14 times the chance for parasitism on eggs of this species. Behavioral and ecological aspects of parasitoids should be considered prior to their use in biological control programs.


2021 ◽  
Vol 2 ◽  
pp. 44-49
Author(s):  
Agus Suroto ◽  
Loekas Soesanto ◽  
Ni Wayan Anik L ◽  
Muhamad Bahrudin

The survey of the distribution and damage of the new pest Spodoptera frugiperda is an important activity to determine appropriate control measures. In addition, the search for natural enemies is also needed as an alternative to controlling these pests. The purpose of this study was to determine the level of damage and the types of natural enemies found in several locations in Banyumas Regency. The method used is perposive random sampling in Banyumas Regency in five sub-districts, namely Ajibarang, Baturaden, Gumelar, Kedungbanteng, and Sumpiuh. Observations were made at 08.00-11.00 WIB from March to June 2021. The results showed that the attack rate of Spodoptera frugiperda larvae varied at each observation location. The highest attack rate was in Sumpiuh and Gumelar Districts, followed by Ajibarang, Kedungbanteng and Baturaden Districts. One species of parasitoid was found, namely Apanteles sp. and 9 predators, namely Oxyopes salticus, Dermaptera, Holcocephala sp., Rainieria sp., Orius insidiosus, Dolichoderus sp., Paratrechina sp., Oecophylla sp. and Conocephalus longipennis. At the individual paraistoid level, Apanteles sp. became the most common, followed by the predatory fly Holcocephala sp. and ants Dolichoderus sp., fly Rainieria sp., ladybug Orius insidiosus, Dermaptera, ant Paratrechina sp., ant Oecophylla sp. and the grasshopper Conocephalus longipennis. 


2018 ◽  
Vol 18 (1) ◽  
pp. 65
Author(s):  
I Gede Swibawa ◽  
Franciscus Xaverius Susilo ◽  
Agus Muhammad Hariri ◽  
Solikhin .

The Population of White-Bellied Planthoppers and their Natural Enemies: the New Pest of Corn in Lampung. The white-bellied planthoppers (Stenocranus pasificus), hereinafter referred to as WBP, as new exotic pests in Lampung have the poten-tial to reduce corn production and threaten national food sovereignty. Therefore, population of the pest needs to be managed to prevent the outbreaks. However, there is still limited information on the bio-ecology of WBP. Thus, this research was conducted to: 1) study the population growth pattern of WBP on various corn cultivars and 2) document the natural enemies of WBP. This research was carried out from May to December 2017with a survey method on several corn fields in South Lampung and planting trial on an experimental field of Faculty of Agriculture, Universitas Lampung planted with 3 corn cultivars, i.e. Madura, P-27 and NK which were arranged in randomized complete block design with three replications. The results of the research showed: 1) there were two peaks of population density observed during plant growth. The peak of adult stage of macroptera population density occurred at 17 and 53 days after planting (dap), the highest number of leaves with oviposition mass was observed at 24 and 65 dap, while the peak of population density of nymph stage and adult stage of brachiptera occurred at 31 and 75 dap; 2) Natural enemies of WBP included 9 orders, classified as specialist predators of mirid bugs (Cyrtorhynus) and rove beetles (Paederus), and generalist predators of spiders (Araneae) and lady beetles (Coccinellidae). The population of specialist predators was fluctuated depending on WBP population, while the population of generalist predators was varied.


2002 ◽  
Vol 20 (2) ◽  
pp. 82-85
Author(s):  
Paul A. Weston ◽  
Brian Eshenaur ◽  
Joel M. Baird ◽  
Jana S. Lamboy

Abstract Pyrrhalta viburni (Paykull), a newly introduced pest of viburnums in the United States, causes extensive defoliation, and eventually death, of a number of species of Viburnum commonly used in managed landscapes and occurring in native habitats. We evaluated several foliar and systemic insecticides for their ability to control the larvae of this leaf-feeding pest. Several foliar insecticides (Conserve SC, Dursban, and Pyronyl Crop Spray) significantly reduced defoliation by larvae, but the most effective products were two systemic insecticides (Merit and Meridian) that were applied before egg hatch. The ability of the soil-applied systemic products to be translocated throughout the plant, to remain active for very long durations (a year or longer), and to have minimal impact on foliar-dwelling natural enemies make them well suited for managing this pest until more sustainable forms of control can be developed.


EDIS ◽  
2017 ◽  
Vol 2017 (6) ◽  
Author(s):  
James P. Cuda ◽  
Patricia Prade ◽  
Carey R. Minteer-Killian

In the late 1970s, Brazilian peppertree, Schinus terebinthifolia Raddi (Sapindales: Anacardiaceae), was targeted for classical biological control in Florida because its invasive properties (see Host Plants) are consistent with escape from natural enemies (Williams 1954), and there are no native Schinus spp. in North America. The lack of native close relatives should minimize the risk of damage to non-target plants from introduced biological control agents (Pemberton 2000). [...]


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