scholarly journals Türkiye’de Aphis craccivora Koch ve Brevicoryne brassicae (Linnaeus) (Hemiptera: Aphididae)’nin Yeni Konukçu Bitki Kaydı: Capsella rubella Reut. (Brassicaceae)

Author(s):  
Şahin KÖK ◽  
İsmail KASAP ◽  
Ersin KARABACAK
2019 ◽  
pp. 16-19
Author(s):  
César Guerra T. ◽  
Rosario Zegarra Zegarra ◽  
Enrique Deza Q.

Se presentan doce especies de áfidos agrupados en diez géneros, identificados para las condiciones del valle de Tacna, como resultado preliminar del trabajo de investigación, cuyo objetivo es la identificación de las diversas especies de áfidos, sus hospederos y enemigos naturales. En este estudio preliminar se dan datos de colección y se remarca la importancia y comentarios acerca de su presencia y distribución en el valle de Tacna, relacionados con sus hospederos y enemigos naturales. Las especies de áfidos tratados son: Aphis craccivora Koch; A. gassypii Glover; Brevicoryne brassicae Linnaeus; Cariviella aegopodii Scopoli; Cinara strofii Fitch; Hyperomysus lactucae Linnaues; Macrosiphum euphorbiae Thomas; Macrosiphum rosae Linnaeus; Metapolohium dirhodum Walker; Myzaphis rosarum Kaltb; Rhopalosiphum  maidis Fitch; Ureucon sonchi Linnaeus.


2021 ◽  
Vol 19 (1) ◽  
pp. 139-154
Author(s):  
MA Hossain ◽  
MS Yasmin ◽  
MAA Bachchu ◽  
MA Alim

Botanicals are promising and attractive alternatives for pest management. In the present study, three botanical oils namely neem (Azadirachta indica), karanja (Pongamia pinnata) and mehogony (Swietenia mahagoni) were tested against the nymphs of Aphis craccivora Koch to evaluate the toxic and repellent effects under laboratory conditions (25 ± 5oC, 65-75% RH). Four concentrations (0.5, 1.0, 1.5, and 2.0%) along with control were maintained with distilled water and tween-20 was used as emulsifier. Leaf dipped method were used for insect bioassay. Insect mortality was recorded at 24, 48 and 72 hours after intervals while repellency was carried out at 2 hours after intervals upto 10th hours and the collected data were analyzed through MSTAT-C program. Results indicated that all the tested oils had toxic and repellent effects against the A. craccivora nymphs. Among the tested botanical oils, no significant difference was observed in terms of mortality over treatment time. But significant difference was noticed over level of concentrations exerted by the botanical oils. The average highest mortality (28.62%) was recorded by the application of mehogony oil whereas neem oil showed the lowest mortality (27.21%) against the A. craccivora and the mortality was directly proportional to the level of concentrations and hour after treatment (HAT). Probit analysis showed the lowest LD50 values of mehogony oil which revealed the highest toxic effect against the nymph of bean aphid. The highest repellent effect (77.33%) was found in mehogony oil (repellent class IV) among all the botanical oils applied. On the contrary, neem (57.33%) and karanja (55.00%) oils belonged to the same repellent class that is repellent class II. Although all the tested botanical oils evaluated showed toxic and repellent effects but mehogony oil performed as the best potent oil against the nymphs. We therefore suggested using the mehogony oil for the management of bean aphid. SAARC J. Agric., 19(1): 139-154 (2021)


1976 ◽  
Vol 66 (2) ◽  
pp. 331-333 ◽  
Author(s):  
J. A. K. Farrell

AbstractIn two trials, at Chitedze, Malawi, in 1966–1967, the spread of rosette virus disease in groundnuts (Arachis hypogaea) intersown with field beans (Phaseolus vulgaris) was less than the spread in groundnut monocultures comprising plant populations equivalent to the number of groundnut plants and to the total number of plants in the intersown crop. In one trial, numbers of early rosette transmissions were related to numbers of alate Aphis craccivora Koch, the vector of the virus, found on groundnut plants. Immigrant alate A. craccivora settling on the intersown crop were trapped by the hooked epidermal hairs of the bean plants and the observed reduction of rosette infection in the intersown crop was attributed to this effect. Inter-sowing with beans is considered less effective than early-sown, high-density monoculture as a method of reducing groundnut rosette infections and yields of groundnuts from inter-sown crops may be lower than those obtained from high-density monoculture.


2019 ◽  
Vol 143 (6) ◽  
pp. 659-669
Author(s):  
Seydou Diabate ◽  
Emilie Deletre ◽  
Lucy Kananu Murungi ◽  
Komi K.M. Fiaboe ◽  
John Wesonga ◽  
...  

2015 ◽  
Vol 75 (4) ◽  
pp. 451-456 ◽  
Author(s):  
Lilian R Descamps ◽  
Carolina Sánchez-Chopa ◽  
Jorge Bizet-Turovsky

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