oalib
Search Results: 1 - 10 of 33 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /33
Display every page Item
Primer registro de parasitoides de la cochinilla rosada del hibisco, Maconellicoccus hirsutus (Hemiptera: Pseudococcidae), en Colombia First record of parasitoids of the pink hibiscus mealybug, Maconellicoccus hirsutus (Hemiptera: Pseudococcidae), in Colombia
JOSé MAURICIO MONTES RODRíGUEZ
Revista Colombiana de Entomología , 2012,
Abstract: Dos especies de parasitoides, Anagyrus kamali y Gyranusoidea indica (Hymenoptera: Encyrtidae), asociadas a la cochinilla rosada del hibisco Maconellicoccus hirsutus (Hemiptera: Pseudococcidae) son reportadas por primera vez, en la zona urbana de los municipios de Cúcuta y Los Patios, en el departamento de Norte de Santander. Two species of parasitoids, Anagyrus kamali and Gyranusoidea indica (Hymenoptera: Encyrtidae), associa-ted with the pink hibiscus mealybug Maconellicoccus hirsutus (Hemiptera: Pseudococcidae), are reported for the first time, in urban areas of the municipalities of Cucuta and Los Patios, in the department of Norte de Santander, Colombia.
Parasitismo natural e inducido de Anagyrus kamali sobre la cochinilla rosada en brotes de teca, en Bahía de Banderas, Nayarit
García-Valente, Félix;Ortega-Arenas, Laura D.;González-Hernández, Héctor;Villanueva-Jiménez, Juan A.;López-Collado, José;González-Hernández, Alejandro;Arredondo-Bernal, Hugo C.;
Agrociencia , 2009,
Abstract: the parasitoid anagyrus kamali moursi is used in biological control programs against pink hibiscus mealybug (phm) maconellicoccus hirsutus (green). however, detailed studies on its impact in field conditions are needed. this study evaluated natural and induced parasitism of a. kamali against phm on teak shoots covered with organza sleeves under field conditions in bahía de banderas, nayarit, méxico. the treatments were 1) exclusion of natural enemies, 2) natural parasitism, and 3) induced parasitism (a. kamali). the effect of the treatments was determined by recording the numbers of phm nymphs, adult females and ovisacs as well as the number of parasitoid mummies 15 and 30 d after treatments were established. the parasitoid a. kamali regulated the population growth of phm on the sprouts covered with organza sleeves under field conditions. the average reduction of the pest was 96.5 % in 30 d. natural parasitism was negligible in regulating the pest and did not prevent its increase; this was attributed to interference of ants and to the negative impact of hyperparasitoids.
Effect of Plant Characteristics and Within-Plant Distribution of Prey on Colonization Efficiency of Cryptolaemus montrouzieri (Coleoptera: Coccinellidae) Adults
Folukemi Adedipe,Yong-Lak Park
Psyche , 2012, DOI: 10.1155/2012/503543
Abstract: Cryptolaemus montrouzieri (Coleoptera: Coccinellidae) has been widely used in classical and inundative biological control of mealybugs, including the long-tailed mealybug, Pseudococcus longispinus (Hemiptera: Pseudococcidae). This study was conducted to investigate colonization and establishment efficiency of C. montrouzieri to manage P. longispinus on three different ornamental plant species (Ficus elastica, Lilium longiflorum, and Dieffenbachia seguine). Within-plant distribution pattern of P. longispinus and the colonization ecology of adult C. montrouzieri were investigated. Significantly more P. longispinus were found on the upper parts of the plants regardless of plant species, and C. montrouzieri adults discovered P. longispinus significantly faster when they were released on the top of the plants than on the bottom. Choice tests revealed that C. montrouzieri adults preferred smaller P. longispinus nymphs. The implications for utilization of C. montrouzieri for biological control of mealybugs on various ornamental plants are discussed.
Biological Control of Citrus Mealybug, Planococcus citri (Risso.) using Coccinellid Predator, Cryptolaemus montrouzieri Muls.  [PDF]
Amal I. Afifi,Said A. El Arnaouty,Angel R. Attia,Asmaa EL-Metwally Abd Alla
Pakistan Journal of Biological Sciences , 2010,
Abstract: The coccinellid predator, Cryptolaemus montrouzieri Mulsant (Coleoptera: Coccinellidae) was used to control the citrus mealybug, Planococcus citri (Risso.) (Homoptera: Pseudococcidae) on the croton ornamental shrubs, Codiaeum variegatum L. at Giza governorate, Egypt. Cryptolaemus montrouzieri Mulsant, 50 adults/Croton shrub, were released once on October 27, 2008 in the open field. Obtained results indicated that percentages of reduction among the egg masses, nymphs and adults of P. citri, one month after releasing the predator reached to 41.5, 42.3 and 57.5%, respectively. Two months later, the corresponding rates were 80.6, 86.5 and 91.5%. Finally, after three months of releasing the predator, reduction rates reached to 100% for all stages of the pest. The associated natural enemies in the field were consisted of three predaceous insects and one parasitic species. The insect predators secured were the hemerobiid predator, Sympherobius amicus Navas; the coccinellid predator, Scymnus syriacus (Mars.) and the chrysopid predator, Chrysoperla carnea (Stephens). The parasitic species was the encyrtid, Coccidoxenoides peregrinus (Timberlake). The aforementioned natural enemies were found feeding on the citrus mealybug, Planococcus citri infesting croton shrubs. In the second season, 2009 there is no mealybug, P. citri individuals were found on the croton shrubs.
Selectivity of phytosanitary products used in organic farming on adult of Cryptolaemus montrouzieri (Coleoptera, Coccinellidae) under laboratory conditions Seletividade de produtos fitossanitários, usados no sistema de produ o organica, sobre adultos de Cryptolaemus montrouzieri (Coleoptera, Coccinellidae), em laboratório  [cached]
Caio Fábio Stoffel Efrom,Luiza Rodrigues Redaelli,Rafael Narciso Meirelles,Cláudia Bernardes Ourique
Semina : Ciências Agrárias , 2011,
Abstract: The association of pesticides with biological control is possible only if they provide some selectivity to natural enemies. In the organic production system the effect of insecticides on beneficial insects has not been extensively studied. Thus, this study aimed to evaluate in laboratory conditions the effect of pesticides used in this system on the adults of the predator Cryptolaemus montrouzieri Mulsant (Coleoptera, Coccinellidae). We used four treatments, which corresponded to four multiple values (0.25x, 0.5x, 2x and 1x) of the concentration recommended by manufacturers of the following products: Rotenat CE , Pironat , Biopirol 7M , Organic Neem , Natuneem and lime sulfur, which were tested in C. montrouzieri by topical application and residual exposure. None of the products, at any concentrations tested, had a significant effect on the survival of adults of C. montrouzieri, what did not differ from the distilled water control, showing that the products tested are selective to the adults of this species. However, other forms of exposure and evaluation methods must be studied. A associa o do controle biológico com produtos fitossanitários só é possível se estes apresentarem alguma seletividade aos inimigos naturais. No sistema de produ o organica, o efeito de inseticidas sobre insetos benéficos n o tem sido extensivamente estudado. Assim, este trabalho objetivou avaliar em laboratório o efeito de produtos fitossanitários utilizados neste sistema, sobre adultos do predador Cryptolaemus montrouzieri Mulsant (Coleoptera, Coccinellidae). Foram utilizados quatro tratamentos, os quais corresponderam quatro múltiplos (0,25x, 0,5x, 1x e 2x) da concentra o recomendada pelos fabricantes dos seguintes produtos comerciais: Rotenat CE , Pironat , Biopirol 7M , Organic neem , Natuneem e calda sulfocálcica, que foram testados sobre C. montrouzieri por aplica o tópica e exposi o a resíduos. Nenhum dos produtos, em qualquer das concentra es testadas, apresentou efeito significativo sobre a sobrevivência de adultos de C. montrouzieri, n o diferindo da testemunha água destilada, demonstrando que os produtos testados s o seletivos aos adultos dessa espécie.
Seletividade de inseticidas utilizados em cultura cafeeira para larvas de Cryptolaemus montrouzieri Mulsant
Rocha, Luiz Carlos Dias;Carvalho, Geraldo Andrade;Moscardini, Valéria Fonseca;Rezende, Denise Tourino;
Ciência Rural , 2011, DOI: 10.1590/S0103-84782011000600004
Abstract: as well as most of the crops, in coffee crop, the association of selective compounds and natural enemies, composes an important tool for the integrated pest management (ipm). the objective of this study was to evaluate the selectivity of some pesticides used in coffee crops on larvae of cryptolaemus montrouzieri mulsant, 1853 (coleoptera: coccinellidae) under controlled laboratory conditions (climatic chamber) at 25±2°c, rh of 70±10% with a 12 h-photophase. the randomized experimental design was used, with six treatments and ten repetitions, being each composed for two larvae. for the comparisons of the averages of treatments, a factorial scheme was used with the products x number of instars for the different instars subsequent the application. the pesticides and doses in g of a.i. l-1 were: thiamethoxan (0.5), imidacloprid (0.7), mineral oil (13.3), endosulfan (2.63) and dimethoate (0.48). distilled water was used as control. the sprayings of the pesticides were accomplished using a potter's tower. the parameters evaluated were: specimens survival after the application of the compounds, and the compounds effects over the reproductive parameters of the predator. thiamethoxan (0.5), imidacloprid (0.7) and endosulfan (2.63) were the most harmful to the treated individuals and for the first two compounds it was observed 100% of larvae mortality of the first and second instars soon at 1 day after the application and reduction in the survival of the larvae of third and fourth instars. dimethoate (0.48) was harmful for the larvae of the first instar and slightly harmful for larvae of fourth instar. as a function of the selectivity presented by mineral oil (13.3), it can be recommended aiming its compatibilization with the c. montrouzieri natural enemy in programs of ipm in coffee crop.
Comparison of Biological Characteristics of Cryptolaemus montrouzieri Muls. (Col.: Coccinellidae) on Planococcus citri Risso (Hom.: Pseudococcidae) and Pulvinaria aurantii Cockerell (Hom.: Coccidae) in Laboratory  [cached]
E. Gharizadeh,B. Hatami,H. Seyedoleslami
Journal of Science and Technology of Agriculture and Natural Resources , 2004,
Abstract: The coccinellid Cryptolaemus montrouzieri Muls. is an oligophagous predator that is used to control mealy bugs in the orchards and greenhouses. Citrus soft scale, Pulvinaria aurantii, as an active pest on citrus plants in North of Iran is also attacked by this predator. This research was conducted to study biological characteristics of C. montrouzieri on citrus soft scale and mealy bug, Planococcus citri. Initially, Cryptolaemus eggs were collected from colonies of two preys and reared in laboratory (14 L: 10 D, 25±1 C, and RH 70 ±5%). The incubation period of eggs, 1st, 2nd, 3rd and, 4th larval instars, and total larval, prepupal, and pupal stages were studied on two preys. The developmental stages on two preys were not significantly different, except for the 4th larval instar at 1% and total larval stages at 5%. The sex ratio of male to female on two preys were not significantly different at 1% and was 1:1. Except for pre-oviposition period, other parameters including female longevity, average number of eggs laid per day, average total number of eggs laid per female and percentage of hatching were significantly different at 1% on the two preys. The average feeding of total larval period on eggs of mealy bug and citrus soft scale were 5715 and 7694, respectively that, the difference was significant at 1%. The results showed that some of the biological characteristics of Cryptolaemus on two preys were significantly different. Since the predator feeding on the eggs of citrus soft scale was higher than the mealy bug, it seems that this beneficial insect could be used for biological control of the citrus soft scale.
Effects of Transgenic Cry1Ac + CpTI Cotton on Non-Target Mealybug Pest Ferrisia virgata and Its Predator Cryptolaemus montrouzieri  [PDF]
Hongsheng Wu, Yuhong Zhang, Ping Liu, Jiaqin Xie, Yunyu He, Congshuang Deng, Patrick De Clercq, Hong Pang
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0095537
Abstract: Recently, several invasive mealybugs (Hemiptera: Pseudococcidae) have rapidly spread to Asia and have become a serious threat to the production of cotton including transgenic cotton. Thus far, studies have mainly focused on the effects of mealybugs on non-transgenic cotton, without fully considering their effects on transgenic cotton and trophic interactions. Therefore, investigating the potential effects of mealybugs on transgenic cotton and their key natural enemies is vitally important. A first study on the effects of transgenic cotton on a non-target mealybug, Ferrisia virgata (Cockerell) (Hemiptera: Pseudococcidae) was performed by comparing its development, survival and body weight on transgenic cotton leaves expressing Cry1Ac (Bt toxin) + CpTI (Cowpea Trypsin Inhibitor) with those on its near-isogenic non-transgenic line. Furthermore, the development, survival, body weight, fecundity, adult longevity and feeding preference of the mealybug predator Cryptolaemus montrouzieri Mulsant (Coleoptera: Coccinellidae) was assessed when fed F. virgata maintained on transgenic cotton. In order to investigate potential transfer of Cry1Ac and CpTI proteins via the food chain, protein levels in cotton leaves, mealybugs and ladybirds were quantified. Experimental results showed that F. virgata could infest this bivalent transgenic cotton. No significant differences were observed in the physiological parameters of the predator C. montrouzieri offered F. virgata reared on transgenic cotton or its near-isogenic line. Cry1Ac and CpTI proteins were detected in transgenic cotton leaves, but no detectable levels of both proteins were present in the mealybug or its predator when reared on transgenic cotton leaves. Our bioassays indicated that transgenic cotton poses a negligible risk to the predatory coccinellid C. montrouzieri via its prey, the mealybug F. virgata.
The effects of temperature on laboratory population of Cryptolaemus montrouzieri Mulsant
温度对孟氏隐唇瓢虫实验种群的影响

CHEN Xianfeng,REN Shunxiang,YING Xialing,PANG Hong,
陈先锋
,任顺祥,应霞玲,庞虹

生态学报 , 2000,
Abstract: 在14-34℃范围内研究了温度对孟氏隐唇瓢虫实验种群生长发育的影响,结果表明,在14-29℃范围内,温度愈低,发育历期愈长,当温度达到32℃后,发育历期又略有延长。孟氏隐唇瓢虫世代发育起点温度为11.9℃,有效积温为452.3日度。孟氏隐唇瓢虫世代存活率为26℃最高,以34℃最低。在20-32℃范围内,孟氏隐唇瓢虫内禀增长率(rm)、周限增长率(λ)和世代净增长率(R0)均以26℃为最高,分别为0
LA COCHINILLA ROSADA DEL HIBISCO, Maconellicoccus hirsutus (GREEN), UN PELIGRO POTENCIAL PARA LA AGRICULTURA CUBANA
Martínez Rivero,María de los ángeles;
Revista de Protecci?3n Vegetal , 2007,
Abstract: maconellicoccus hirsutus (green) (hemiptera: pseudococcidae), well-known as pink hibiscus mealybug, constitutes a new species in the neotropical region. it is associated to 73 plant families in more than 200 genera; thus it is considered as a highly polyphagous species. due to the increasing importance from the reports on the economic impact caused in the caribbean subregion, the damages and significant losses it has provoked, especially in grenade island and its quick dissemination in the area; a permanent surveillance should be established to prevent its possible introduction in our national territory. for such a reason, the present work constitutes another alternative in currently spreading the main characteristics of this exotic mealybug, which can be transformed into a potential danger for our agriculture. also, the methods for its control are approached, making emphasis in the biological control and in some of the actions made by the country to delay and/or diminish introduction risks.
Page 1 /33
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.