Table 1: Summary of studies on the evaluation of plant products for mosquito control in Zimbabwe from 1990 to 2022

Author [Reference]

Objectives

Study area

Plant species used

Plant part used

Mosquito species tested

Method

Result

Lukwa, et al.  [25]

To evaluate the effectiveness of Lippia javanica and Ocimum canum as larvicides

Kamhororo, Gokwe South district, Midlands Province

L. javanica and

O. canum

Leaves

 

An. gambiae s.s. larvae

 

WHO susceptibility tests

Plant larvicides were effective against An. gambiae s.s. mosquito larvae

Lukwa, et al. [26]

To determine the major constituents of Lippia javanica leaf extracts and their repellency against laboratory-reared Aedes aegypti mosquitoes

Musana Communal lands in Bindura district, Mashonaland Central Province

L. javanica

Leaves

Ae. aegypti adult mosquitoes

Arm-in-cage experiments

Leaf extracts of L. javanica were effective at repelling Ae. aegypti mosquitoes

Kazembe and Jere [22]

To investigate the effectiveness/efficacy of ethanolic extracts of Colophospermum mopane, Dicoma. anomala and Lippia javanica and their mixtures in repelling Aedes aegypti mosquitoes

Buhera district, Manicaland Province

C. mopane, D. anomala and L. javanica

Leaves

A. aegypti adult mosquitoes

Arm-in-cage experiments

Higher repellencies were observed for extract mixtures than for individual plant extracts.

 

Kazembe and
Nkomo [20]

To evaluate the repellency and mosquitocidal effects of extracts from plants Blumea alata, Bidens pilosa and Chenopodium ambrosioides against Aedes aegypti mosquitoes

Hurungwe District, Mashonaland West Province

B. alata, B. pilosa and C. ambrosioides

Leaves

Ae. aegypti adult mosquitoes

Arm-in-cage experiments

Individual extracts from O. americanum and B. alata had short protection periods (2 hrs and below). The protection period increased when using a mixture of extracts.

Kazembe, et al. [27]

To evaluate the potential of the extracts of Ocimum americanum and Blumea alata as sources of mosquito repellents

Mt Darwin district, Mashonaland Central Province, and Hurungwe district in Mashonaland West Province

O. americanum and B. alata

Leaves

Ae. aegypti adult mosquitoes

Arm-in-cage experiments

Individual extracts from O. americanum and B. alata had short protection periods (2 hrs and below). The protection period increased when using a mixture of extracts.

Lukwa, et al. [28]

To investigate the knockdown and insecticidal effect of the plants Tagetes minuta, Lippia javanica, Lantana camara, Tagetes erecta, and Eucalyptus grandis against Anopheles arabiensis mosquitoes

Mumurwi Village in Bindura district, Mashonaland Central Province

T. minuta, L. javanica, L. camara, T. erecta and E. grandis

Leaves

An. arabiensis adults

Burning (smoke) in field experiments

Smoke from burning dried leaves of all these plants had varying knockdown and insecticidal effects against An. arabiensis mosquitoes.

Kazembe and Makusha [29]

To evaluate mosquito repellencies of Capsicum frutescens,

Carica papaya and Cyanodon dactylon extracts and the effect of mixtures

Chiredzi district, Masvingo Province

C.  frutescens,

C. papaya and C. dactylon

Leaves and fruits of C. frutescens, leaves and seeds of C. papaya, and the leaves of

C.  dactylon

Ae. aegypti adult mosquitoes

Arm-in-cage experiments

Individual extracts from C.  frutescens,

C. papaya and C. dactylon had short protection periods (2.5 hrs and below). The protection period increased when using a mixture of extracts.

Kazembe and Chauruka [30]

To evaluate mosquito repellencies of the individual extracts and mixtures of Astrolochii hepii, Cymbopogon citratus, and Ocimum gratissimum

South of Harare

A. hepii, C. citratus and O. gratissimum

Whole plant

Ae. aegypti adult mosquitoes

Arm-in-cage experiments

Individual extracts from the plants had very short protection periods (1.5 hrs and below). The protection period increased when using a mixture of extracts.