Evaluation of resistance in selected cocoa genotypes to the brown cocoa mirid, Sahlbergella singularis Haglund in Nigeria

Anikwe, J. C.; Omoloye, A. A.; Aikpokpodion, Peter O.; Okelana, F. A.; Eskes, Albertus

doi:10.1016/j.cropro.2008.11.014

Cited by 26 publications

(15 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The present study suggests the need for multilocational studies to ascertain regional differences in mirid numbers, damage trends and for location-specific control strategies to be put in place. More mirids were caught in traps, and greater tissue damage was observed on Amelonado compared to hybrid cocoa farms and is in agreement with reports suggesting that hybrid cocoa varieties are more resistant to mirid attack than the Amelonado varieties (Sounigo et al 2003;Anikwe et al 2009).…”

Section: Discussionsupporting

confidence: 90%

“…The broad pattern of mirid numbers across the season recorded by the visual hand‐height assessment method was broadly similar to other reports on mirid population dynamics on cocoa in West Africa (Anikwe et al. ; Babin et al. ).…”

Section: Discussionsupporting

confidence: 88%

“…Pest population monitoring is also a means for determining when pests enter a crop and when their numbers have built up sufficiently to warrant separate control measures or to predict correct timing for such measures (Van-Emden 1996). The broad pattern of mirid numbers across the season recorded by the visual hand-height assessment method was broadly similar to other reports on mirid population dynamics on cocoa in West Africa (Anikwe et al 2009;Babin et al 2010). However, the results from the hand-height method did not correlate with the observation of high mirid numbers in the first half of the year as seen using pheromone trapping.…”

Section: Discussionsupporting

confidence: 85%

See 2 more Smart Citations

Optimizing mirid control on cocoa farms through complementary monitoring systems

Awudzi

Cudjoe

Hadley

et al. 2016

J Applied Entomology

View full text Add to dashboard Cite

Mirids (Sahlbergella singularis and Distantiella theobroma) are the most important insect pests affecting cocoa production across West Africa. Understanding the population dynamics of mirids is key to their management; however, the current recommended hand‐height assessment method is labour intensive. The objective of the study was to compare recently developed mirid sex pheromone trapping and visual hand‐height assessment methods as monitoring tools on cocoa farms and to consider implications for a decision support system. Ten farms from the Eastern and Ashanti regions of Ghana were used for the study. Mirid numbers and damage were assessed fortnightly on twenty trees per farm, using both methods, from January 2012 to April 2013. The mirid population increased rapidly in June, reached a peak in September and began to decline in October. There was a significant linear relationship between numbers of mirids sampled to hand‐height and mirid damage. High numbers of male mirids were recorded in pheromone traps between January and April 2012 after which there was a gradual decline. There was a significant inverse relationship between numbers of trapped adult mirids and mirids sampled to hand‐height (predominantly nymphs). Higher temperatures and lower relative humidities in the first half of the year were associated with fewer mirids at hand‐height, but larger numbers of adult males were caught in pheromone traps. The study showed that relying solely on one method is not sufficient to provide accurate information on mirid population dynamics and a combination of the two methods is necessary.

show abstract

Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 88%

Section: Discussionsupporting

confidence: 85%

See 1 more Smart Citation

Optimizing mirid control on cocoa farms through complementary monitoring systems

Awudzi

Cudjoe

Hadley

et al. 2016

J Applied Entomology

View full text Add to dashboard Cite

show abstract

“…In 1887, the government sent seedlings from the old botanical garden at Ebute-meta (Lagos) up country (Ibadan) for trials. This explains why cacao cultivation gained its first impetus around Ibadan and the western states of Nigeria (Opeke, 1992;Anikwe et al, 2009). Nigeria reported her first cocoa export in 1900 (Opeke, 1992).…”

Section: Introductionmentioning

confidence: 99%

Laboratory bioassay of selected plant extracts for the control of brown cocoa mirid, Sahlbergella singularis Haglund (Hemiptera: Miridae)

Anikwe¹

2013

J. Entomol. Nematol.

View full text Add to dashboard Cite

Laboratory bioassays were conducted on five-selected aqueous plant extracts for contact toxicity and residual action on the brown cocoa mirid, Sahlbergella singularis. The extracts were Mangifera indica (leaf), Anacardium occidentale (leaf), Ocimiun gratissimun (leaf), Azadirachta indica (stem bark) and Acalypha wilkesiana (leaf). Leaf extracts of M. indica, A. wilkesiana and stem bark extract of A. indica applied at 1:5% w/v gave an effective kill of 100, 80 and 80%, respectively, for contact toxicity. M. indica aqueous extract recorded a 100% mirid mortality at the three concentrations tested for 24 h post treatment for residual action, while A. indica gave 89% mortality of mirids at 1:5% w/v. Neem extract was observed to be slow acting. Extracts of A. occidentale was not efficacious and treatment was not significantly different from that of control (water) at 5% probability level.

show abstract

“…Specifically, one of the major production risks in cocoa agriculture is the growing problem of pests and diseases (Edith, 2016). In Cameroon, among the most common and highly destructive cocoa pests are mirids (Bisseleua et al, 2011;Babin et al, 2010), which could be responsible for between 30 to 70% of cocoa yield losses (Anikwe et al, 2009). Another pest of significance in cocoa cultivation is pod borer, which could account for about 50% of cocoa yield losses in Cameroon (Fule, 2013) and 42 to 49% in Malaysia (Day, 1989).…”

Section: Introductionmentioning

confidence: 99%

Cocoa Farmers’ Safety Perception and Compliance With Precautions in the Use of Pesticides in Centre and Western Cameroon

Oyekale¹

2017

Appl Ecol Env Res

View full text Add to dashboard Cite

Abstract. Although pesticides are necessary inputs in cocoa production, inability of farmers to comply with safety precautions poses significant threat to their health and sustainable cocoa production in Cameroon. This paper analyzed the determinants of compliance with pesticide safety guideliness among cocoa farmers. Data were collected with structured questionnaires administered to 667 cocoa farmers and analyzed with descriptive statistics and Negative Binomial regression. The results showed that majority of the farmers were males, with more than 10 years of farming experience. Awareness of safety precautions in handling pesticides was high. Among the safety kits, boots were owned by 62.26% and 76.87% of the farmers from Ngoumou and Buea, respectively. Safety compliance in the use of insecticides increased significantly (p<0.05) with land areas, being married and compliance with manufacturers' instructions but reduced with farmers' age, practice of touching it with bare hand and residence in Nogoumou (region). However, compliance with safety while handling fungicides significantly increased with being married but reduced with practice of touching it with bare hands. It was concluded that addressing the health risks associated with inappropriate handling of pesticides by cocoa farmers is paramount, and educating them on the need to follow manufacturers' instruction is necessary.

show abstract

Evaluation of resistance in selected cocoa genotypes to the brown cocoa mirid, Sahlbergella singularis Haglund in Nigeria

Cited by 26 publications

References 2 publications

Optimizing mirid control on cocoa farms through complementary monitoring systems

Optimizing mirid control on cocoa farms through complementary monitoring systems

Laboratory bioassay of selected plant extracts for the control of brown cocoa mirid, Sahlbergella singularis Haglund (Hemiptera: Miridae)

Cocoa Farmers’ Safety Perception and Compliance With Precautions in the Use of Pesticides in Centre and Western Cameroon

Contact Info

Product

Resources

About