RESIDUAL EFFICACY OF FOLIAR INSECTICIDES AGAINST APHID POPULATIONS IN ALFALFA, 1999

Abstract Background The rapid spread of insecticide resistance in malaria vectors and the rebound in malaria cases observed recently in some endemic areas underscore the urgent need to evaluate and deploy new effective control interventions. A randomized control trial (RCT) was conducted with the aim to investigate the benefit of deploying complementary strategies, including indoor residual spraying (IRS) with pirimiphos-methyl in addition to long-lasting insecticidal nets (LLINs) in Diébougou, southwest Burkina Faso. Methods We measured the susceptibility of the Anopheles gambiae (s.l.) population from Diébougou to conventional insecticides. We further monitored the efficacy and residual activity of pirimiphos-methyl on both cement and mud walls using a laboratory susceptible strain (Kisumu) and the local An. gambiae (s.l.) population. Results An. gambiae (s.l.) from Diébougou was resistant to DDT, pyrethroids (deltamethrin, permethrin and alphacypermethrin) and bendiocarb but showed susceptibility to organophosphates (pirimiphos-methyl and chlorpyrimiphos-methyl). A mixed-effect generalized linear model predicted that pirimiphos-methyl applied on cement or mud walls was effective for 210 days against the laboratory susceptible strain and 247 days against the local population. The residual efficacy of pirimiphos-methyl against the local population on walls made of mud was similar to that of cement (OR = 0.792, [0.55–1.12], Tukey’s test p-value = 0.19). Conclusions If data on malaria transmission and malaria cases (as measured trough the RCT) are consistent with data on residual activity of pirimiphos-methyl regardless of the type of wall, one round of IRS with pirimiphos-methyl would have the potential to control malaria in a context of multi-resistant An. gambiae (s.l.) for at least 7 months.

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Effects of the Ant, Lasius niger (L.), on the Behaviour and Reproduction of the Black Bean Aphid, Aphis fabae Scop

Bulletin of Entomological Research ◽

10.1017/s0007485300053979 ◽

1958 ◽

Vol 49 (4) ◽

pp. 701-714 ◽

Cited By ~ 37

Author(s):

C. J. Banks

Keyword(s):

Natural Enemies ◽

Plant Tissue ◽

Food Supply ◽

Aphis Fabae ◽

Lasius Niger ◽

Average Difference ◽

Young Plant ◽

Black Bean ◽

Bean Plants ◽

Aphid Populations

SummaryCage experiments confirmed that, in the absence of natural enemies, populations of Aphis fabae Scop., attended on bean plants (Vicia faba) by the ant, Lasius niger (L.), multiply more rapidly than otherwise similar but ant-free populations. The average difference in numbers recorded, was about one-third, the maximum being 70 per cent. No doubling or trebling of aphid numbers as claimed by an earlier worker was ever recorded.When the Aphids are attended by ants, their excretion behaviour alters and the normal dispersal of the apterae from the young apical growth of bean plants is considerably delayed.No significant differences were found between the numbers of nymphs produced by individual Aphids from ant-visited and ant-free plants, respectively, living on leaves of the same age; but the numbers were significantly affected by the age of the leaf or part of the plant on which the Aphids had developed or were then feeding.It is suggested that ant-attended aphid populations multiply more rapidly because most of the Aphids feed for a much longer time on young plant tissue where, presumably, their food supply is more nutritious.

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Interactions among convergent lady beetle (Hippodamia convergens) releases, aphid populations, and rose cultivar

Biological Control ◽

10.1016/j.biocontrol.2005.03.019 ◽

2005 ◽

Vol 34 (1) ◽

pp. 38-46 ◽

Cited By ~ 13

Author(s):

Mary Louise Flint ◽

Steve H. Dreistadt

Keyword(s):

Lady Beetle ◽

Hippodamia Convergens ◽

Aphid Populations

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STUDY REGARDING THE APHIDOFAGOUS FAUNA STRUCTURE IN THE PEACH ORCHARDS FROM CONSTANTA COUNTY IN 2020

Romanian Journal for Plant Protection ◽

10.54574/rjpp.13.17 ◽

2020 ◽

Vol 13 ◽

pp. 110-114

Author(s):

Andrei Chiriloaie-Palade ◽

Mădălina Radulea ◽

Gheorghe Lămureanu ◽

Ștefan Ion Mocanu ◽

Maria Iamandei

Keyword(s):

Myzus Persicae ◽

Management System ◽

Green Peach Aphid ◽

Aphid Species ◽

Insect Species ◽

Essential Component ◽

Intensive Use ◽

Predatory Insect ◽

Predatory Insects ◽

Aphid Populations

"The cosmopolitan aphid species Myzus persicae is a key pest of peach orchards in south and southeastern Romania. The phenomenon of resistance induced by the intensive use of insecticides is a matter of concern for farmers and protectionists, making necessary integrated measure for the control of this pest. Conservation of natural enemy’s populations is an essential component of any management system proposed for pest aphids. The aim of the study was to determine the structure of predatory insects associated with Myzus persicae populations in peach orchards. The research was carried out in three orchards from two localities from Constanta County, in peach plantations with Springcrest variety aged 7, 11 and 12 years. As a result of this study, there were determined a total of 15 predatory insect species belonging to eight systematic families: Coccinellidae, Chrysopidae, Hemerobiidae, Syrphydae, Cecidomyiidae, Panorpidae, Nabidae and Forficulidae, which naturally contribute to the reduction of the green peach aphid populations. "

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