Cotton pests and their natural enemies in Madagascar

Kuklinski, F.; Borgemeister, Christian

doi:10.1046/j.1439-0418.2002.00622.x

Cited by 7 publications

(3 citation statements)

References 11 publications

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“…If these compounds are to realize their potential in applied entomology, more studies need to be conducted using HIPVs that study the response of natural enemies under Þeld conditions. A rich diversity of parasitoid and arthropod predator species is known to inhabit cotton Þelds (Kuklinski andBorgemeister 2002, Boyd et al 2005), and it is generally recognized that natural enemies play an important role in regulating pest herbivore populations (King et al 1985, Hopper et al1991. In particular, the predator community in cotton Þelds was found to be shaped chießy by species that were abundant in these regions, including Orius similes Zheng and Propylaea japonica Thunberg (Li et al 2003).…”

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confidence: 99%

Field-Testing of Synthetic Herbivore-Induced Plant Volatiles as Attractants for Beneficial Insects

Zhang

et al. 2008

116

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Seven synthetic herbivore-induced plant volatiles (HIPVs) and a mixture of nonanal + (Z)-3-hexen-1-ol were field tested for their ability to attract beneficial insects in an open cotton field. Eleven species of the main natural enemies of insect pests in cotton fields were studied. Significantly greater numbers of the ladybird beetle Coccinella septempunctata were trapped on (Z)-3-hexenyl acetate-baited cards than on others that were HIPV baited or the control cards. Erigonidium graminicolum was attracted to traps baited with nonanal, (Z)-3-hexenyl acetate, and methyl salicylate (MeSA). The predatory bug Deraeocoris punctulatus was only attracted to traps baited with octanal. The predatory bug Orius similis responded to traps baited with 3,7-dimethyl,1,3,6-octatriene, nonanal, (Z)-3-hexenyl acetate, nonanal + (Z)-3-hexen-1-ol, and MeSA. Dimethyl octatriene, nonanal + (Z)-3-hexen-1-ol, and octanal significantly attracted the syrphid fly Paragus quadrifasciatus. The ladybird beetle Propylaea japonica, the green lacewing Chrysopa sinica, the bigeyed bug Geocoris pallidipennis, the syrphid fly Epistrophe balteata, and the parasitic wasp Campoletis chlorideae did not respond to any of the HIPVs tested. These results are discussed with regard to the potential of HIPVs as tools for recruiting natural enemies into cotton fields.

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confidence: 99%

Field-Testing of Synthetic Herbivore-Induced Plant Volatiles as Attractants for Beneficial Insects

Zhang

et al. 2008

116

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“…In the diet, we found Noctuid pest species of major agricultural importance such as Earias cupreoviridis, which damaged cotton fields in Tanzania and Uganda [84]. Anomis flava is another Noctuid pest that we detected in this study and has been reported to damage cotton in Australia, the Philippines, India, and Madagascar [85][86][87]. Sphingomorpha chlorea (a widespread noctuid) was found to cause considerable damage to fruits in Southeast Asia and Africa [88].…”

Section: Pest Arthropods In the Diet Of Batsmentioning

confidence: 93%

Our good neighbors: Understanding ecosystem services provided by insectivorous bats in Rwanda

Nsengimana,

Walker,

Webala

et al. 2023

PLoS ONE

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Bats are prodigious consumers of agricultural and forest pests, and are, therefore, a natural asset for agricultural productivity, suppressing populations of such pests. This study provides baseline information of diet of 143 bats belonging to eight insectivorous bat species from agricultural areas of Rwanda while evaluating the effectiveness of bats as pest suppressors. Using DNA metabarcoding to analyze bat fecal pellets, 85 different insect species were detected, with 60% (n = 65), 64% (n = 11) and 78% (n = 9) found to be agricultural pests from eastern, northern and western regions, respectively. Given the high percentages of agricultural pests detected, we submit that Rwandan insectivorous bats have the capacity for biocontrol of agricultural pests. Rwandan bat populations should be protected and promoted since they may foster higher crop yields and sustainable livelihoods.

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“…A broad complex of natural enemies act against H. armigera in various agro-ecosystems worldwide (Stam and Elmosa 1990;Kuklinski and Borgemeister 2002). Parasitoids seem to be especially efficient natural enemies, and have been reported to cause mortality levels up to 50% of Heliothis spp.…”

Section: Introductionmentioning

confidence: 99%

Flight potential of Microplitis mediator, a parasitoid of various lepidopteran pests

Zhang

et al. 2008

BioControl

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The efficacy of using natural enemies to control pests under field conditions largely depends on their mobility and, more specifically, on their capacity to quickly locate pest infestation. For many natural enemies, for example parasitoids, mobility is directly related to flight aptitude, which is determined by the capacity and inclination of a species to engage in flight. In this study, we determined the various factors that affected flight performance of Microplitis mediator (Haliday) (Hymenoptera: Braconidae), using a computer-monitored flight mill. No differences were found in flight performance (i.e., flight distance, duration, speed) between both sexes of M. mediator, and flight capacity increased up to an age of 5-7 days followed by a gradual decline afterwards. For one-day-old female parasitoids, mean (±SE) flight distance and duration were 6.23 ± 0.88 km and 85.15 ± 14.44 min, respectively, with a maximum flight distance of 18.0 km. For male parasitoids, mean flight distance and duration were 5.27 ± 0.51 km and 85.74 ± 7.63 min, respectively. Mating status did not affect flight performance of males, while flight distance of four-day-old ovipositing M. mediator females was much lower than that of un-mated females of the same age. Un-mated adults flew most actively at 22-24°C and inclination to fly gradually declined with decreasing temperature. Temperatures above 26°C considerably reduced flight activity of M. mediator. Wasps engaged in normal flight under a broad range of relative humidity (RH) conditions, with an optimum RH range identified as 75-90%. Our research shows that M. mediator is a highly active parasitoid, because both sexes show great inclination to fly under a range of environmental conditions and flight capacity at different ages. Our results can help explain parasitoid performance in the field and provide baseline information to help guide augmentative releases.

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Cotton pests and their natural enemies in Madagascar

Cited by 7 publications

References 11 publications

Field-Testing of Synthetic Herbivore-Induced Plant Volatiles as Attractants for Beneficial Insects

Field-Testing of Synthetic Herbivore-Induced Plant Volatiles as Attractants for Beneficial Insects

Our good neighbors: Understanding ecosystem services provided by insectivorous bats in Rwanda

Flight potential of Microplitis mediator, a parasitoid of various lepidopteran pests

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