Results 101 to 110 of about 399 (135)

Efficacy of biorational insecticides against aphids, Aphis craccivora in amaranthus

Pest Management in Horticultural Ecosystems, 2022
A field experiment was conducted to study the bioefficacy of biorationals against cowpea aphid, Aphis craccivora infesting amaranthus during rabi 2019–20 at the Zonal Agricultural and Horticultural Research Station (ZAHRS), Shivamogga. Out of six biorationals evaluated, the highest per cent reduction of aphid population was recorded in Lecanicillium ...
B. J. Manjushree, Jayalaxmi Narayan Hegde, K. Rajashekarappa, B. Gangadhara Naik, Nagarajappa Adivappar   +4 more
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Resistance in lima bean to Aphis craccivora (Hemiptera: Aphididae)

Phytoparasitica, 2019
The cowpea aphid (Aphis craccivora) can be an important pest on lima bean (Phaseolus lunatus L.). The objective of this work was to evaluate the effect of different genotypes of lima bean on the biology of A. craccivora and to identify possible sources of resistance to aphids under laboratory conditions. Two trials were set up, an antibiosis and a free-
Luiz Carlos de Melo Júnior, Paulo Roberto Ramalho Silva, Antonio Vieira Gomes Neto, Silvino Intra Moreira, Mayara Fernandes dos Santos, Solange Maria de França   +5 more
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Effects of pyriproxyfen on development and hormone of the aphis, Aphis craccivora (Hemiptera: Aphididae)

Journal of Economic Entomology
Abstract Pyriproxyfen (PPF) has been shown to affect the pupal stage and ecdysone levels in holometabolous insects, such as silkworms and mealworms. It remains unknown whether it affects hemimetabolous insects with their hormone levels in insects lacking a pupal stage. In this laboratory study, bioassays were conducted to investigate the
Haolin Li, Wenjie Zhang, Yongheng Zhang, Xiaxia Guo, Jiangan Hou, Honghong Li, Jiguang Wei, Xuesheng Li   +7 more
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Spread of Groundnut Rosette Virus by Aphis craccivora (Koch)

Nature, 1964
IT has been known for many years1 that close spacing of groundnuts, Arachis hypogaea L., reduces the incidence of groundnut rosette in a crop. Storey and Ryland2 pointed out that there was a reduction in the number of rosette virus-infected plants per unit area of land, as well as the reduction in percentage infection that would be expected with larger
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Aphis craccivora . [Distribution map].

Distribution Maps of Plant Pests, 2005
Abstract A new distribution map is provided for Aphis craccivora Koch ( A. medicaginis auctt. nec Koch) (Hem., Aphididae) (Black legume aphid). Host Plants: Groundnut, many other legumes, Capsicum, Citrus .A vector of Black Locust Mosaic disease.
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Varietal Resistance of Cowpea to Cowpea Aphid, Aphis Craccivora Koch.

International Journal of Tropical Insect Science, 1992
As part of an extensive and systematic programme to find genetic sources of resistance to Aphis craccivora, a major pest of cowpea, Vigna unguiculata, a total of 181 accessions from the germpiasm collection at the International Institute of Tropical Agriculture were screened in glasshouse tests using a simple visual damage scale. Twenty-four accessions
A. K. Ansari, H. F. Van Emden, S. R. Singh   +2 more
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Structural analysis of the corpus allatum of an aphid, Aphis craccivora

Journal of Insect Physiology, 1976
Abstract The structure of the corpus allatum of Aphis craccivora was examined when the gland was in both the active and inactive state. Active glands contained large rounded nuclei around the periphery and a central nervous section with many neurosecretory axons.
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MicroRNA-mediated detoxification network conferring afidopyropen tolerance in Aphis craccivora

Pesticide Biochemistry and Physiology
Afidopyropen, distinguished by its unique propylene-based chemical structure, demonstrates high efficacy against leaf-sucking pests. Nevertheless, there are relatively few studies on the mechanism of metabolic resistance to afidopyropen. MicroRNA (miRNA), a crucial post-transcriptional regulator, has been implicated in insecticide tolerance by ...
Yuanxue, Yang, Aiyu, Wang, Xiaochen, Fu, Huahua, Sun, Jianhua, Zhang   +4 more
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Susceptibility of Aphis craccivora (Hemiptera: Aphididae) to three entomopathogenic Fusarium species

Microbial Pathogenesis
The black aphid (Aphis craccivora) is an insect pest that can cause significant losses to different agricultural crops. Entomopathogenic fungi can be good options for controlling this insect. Fusarium species have shown promising results in the biological control of several agricultural pests, mainly of the order Hemiptera.
Athaline Gonçalves Diniz, Roberta de Freitas Grasse, Ana Gabriela Gomes de Lima, Thayza Karine de Oliveira Ribeiro, Antonio Félix da Costa, Patricia Vieira Tiago   +5 more
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Precocene II-Induced Effects in the Aphid Aphis Craccivora Koch.

International Journal of Tropical Insect Science, 1989
Adult (2–20 hr old) viviparous Aphis Craccivora were treated with 0.5 to 4.0 jig of precocene II. Treatment led to dose-related reduction in the progeny number, survival and life span of the aphid, but wing development was not affected. With 2.0 (μg/aphid or more of precocene II, all surviving offsprings shared precocious metamorphosis, but even with 0.
U. S. Srivastava, A. K. Jaiswal
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