Studies of pigeonpea insect pests and their management in farmers' fields in Kenya, Malawi, Tanzania, and Uganda

Minja, E. M.; Shanower, Thomas G.; Songa, J. M.; Ong'aro, J. M.; Kawonga, W T; Mviha, P.J.Z.; Myaka, F A; Slumpa, S.; Okurut-Akol, H.; Opiyo, C

doi:10.4314/acsj.v7i1.27778

Cited by 14 publications

(17 citation statements)

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“…In eastern Africa reports indicate that losses in farmers fields during two seasons in four countries were 14-22% (Minja et al 1999), and storage losses can also be considerable (Silim-Nahdy and Agona 2001). Important losses due to fusarium wilt have been reported.…”

Section: Discussionmentioning

confidence: 98%

Cropping Systems, Uses, and Primary in situ Characterization of Tanzanian Pigeonpea (Cajanus cajan (L.) Millsp.) Landraces

Silim

Bramel

Akonaay³

et al. 2005

Genet Resour Crop Evol

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Landraces of pigeonpea (Cajanus cajan (L.) Millsp.) were collected from farmer's fields in its major cropping areas in Tanzania. Passport data, including descriptors, information on cultural practices and uses were recorded. Pigeonpea intercropping with maize, sorghum and cassava were found to be the dominating cropping systems, with characteristic differences between regions. In the northern part of the country pigeonpea has been developed into a relatively high yielding cash crop. Also in part of the Coastal Zone and Eastern Plain a market, particularly for green pods, have been developed. It is also in these areas near Dar es Salam that pigeonpea is most frequently found as a garden crop.The study showed that farmers mainly relay on self-saved seed, but seed is also quite often provided from other sources. About one third of the farmers selected sowing seed in the field at harvest. Seed storage was considered a great problem, and a variety of indigenous storage techniques were recorded. Chemical seed dressing was only common in the Northern Highlands, where the crop plays an important role as a cash crop. In all areas pigeonpea was consumed green as well as dry. Dry pigeonpea was most often consumed as whole grains, but dehulling was common especially in the Southern Plain. Most landraces identified were long-duration types, medium-duration types only being common in the Coastal Zone. The recorded plant and seed traits varied considerably, but the frequency of landraces with relatively large white or cream seeds and large pods was high in all regions. A number of accessions with potential resistance to fusarium wilt, bruchids and pod borer were identified.

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Section: Discussionmentioning

confidence: 98%

Cropping Systems, Uses, and Primary in situ Characterization of Tanzanian Pigeonpea (Cajanus cajan (L.) Millsp.) Landraces

Silim

Bramel

Akonaay³

et al. 2005

Genet Resour Crop Evol

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“…Affected seeds often do not germinate and are unfit for human consumption. Minja et al (1999) recorded that insect pests caused considerable seed damage from 14% to 69% in the humid regions of Kenya. Ajayi et al (1995) indicated that there are relatively few published accounts of insect damage to pigeon pea in Africa.…”

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confidence: 99%

Field Insect Pests and Crop Damage Assessment of Pigeon Pea (Cajanus cajan [L.] Huth) grown under Ratoon and in Mixture with Maize

Dasbak

Echezona

Asiegbu

2012

Chilean J. Agric. Res.

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The widespread adoption of cropping systems that are sustainable and environmentally friendly is vital for the macroeconomic survival of civilization. Intercropping could ensure stability of insect populations in a system. , and variegated grasshoppers (Zonocerus variegatus) were the crop's seedling pests and caused minimal damage. Clavigralla spp. infestations were high at the reproductive stage causing 24% and 29% seed damage in regular and ratoon pigeon pea crops, respectively. Maize slightly suppressed insect pest incidence and damage to pigeon pea pods and seeds but significantly (P < 0.01) reduced grain yield in the regular pigeon pea crops in 2005 and 2006, although not in the 2007 ratoon. The pigeon pea genotypes differed significantly (P < 0.05) in pest incidence at the podding stage in both the regular and ratoon crops and in grain yield (P < 0.01) for the regular crop. Grain yield of the pigeon pea ratoon crops was about 60% of the regular crop. Farmers were recommended to adopt the ICPL 161 and ICPL 87 genotypes based on pest tolerance and high grain yield or as idiotypes in pigeon pea hybridization programs.

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“…In Bénin, samples were collected during the long rainy season (May to June 2016) in ten villages from four regions: Southern Bénin (Abomey‐Calavi), Eastern Bénin (Ketou, Pobe), Western Bénin (Klouekanme) and Central Bénin (Dassa‐Zounme, Djidja). These counties and regions are considered as the main grain legume production areas in both countries (Minja et al, ; Gbaguidi, Dansi, Loko, Dansi, & Sanni, ; Ayenan, Ofori, Ahoton, & Danquah, ). The geographical coordinates were recorded at each site (Table ).…”

Section: Methodsmentioning

confidence: 99%

“…Commonly referred to as pod sucking bugs or brown spiny bugs, Clavigralla tomentosicollis Stål, C. shadabi Dolling and C. elongata Signoret (Hemiptera: Coreidae) all belong to the species complex that attack grain legume crops in Africa. These species occur widely in Nigeria, Burkina‐Faso, Niger, Bénin, Tanzania and Kenya where they are the major pests of cowpea and French bean (Minja et al, ; Agunbiade et al, ; Chalam et al, ). Clavigralla tomentosicollis and C. shadabi were previously recorded in some regions of Bénin (Dreyer, Baumgärtner, & Tamó, ; Shanower, Romeis, & Minja, ; Egho, ; Agboton et al, ).…”

Section: Introductionmentioning

confidence: 99%

Exploring levels of egg parasitism and variation in egg cuticular chemistry in different Clavigralla spp.

Kpongbe

Berg

Khamis

et al. 2019

J Applied Entomology

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Clavigralla spp. (Hemiptera: Coreidae) are major pests of cowpea (Vigna unguiculata (L.) Walp, Fabacae), common bean (Phaseolus vulgaris L., Fabacae) and pigeon pea (Cajanus cajan L., Fabacae) in Africa. Clavigralla spp. egg parasitoids, Gryon spp. (Hymenoptera: Scelionidae), have previously been reported as potential biological control candidates. Little is known about the parasitism levels and their potential relationship with cuticular chemistry of Clavigralla spp. The aims of this study were to determine parasitism levels of Clavigralla tomentosicollis Stål (Hemiptera: Coreidae) and C. elongata Signoret (Hemiptera: Coreidae) eggs, and to explore the relationship between egg parasitism and egg cuticular chemistry. High parasitism levels were determined for C. tomentosicollis by collecting eggs from plants in mono‐cropping and multi‐cropping systems in farmers’ fields in Bénin and Kenya between April and June 2016. Three species of Clavigralla were recorded: C. tomentosicollis, C. shadabi and C. elongata. Clavigralla tomentosicollis was the most common in both countries, while C. shadabi and C. elongata were only collected in Bénin and Kenya, respectively. An egg parasitoid (Gryon sp.) was recovered from egg batches collected from both countries. In parasitism assays using Gryon sp., the incidence of parasitism was higher in C. tomentosicollis eggs than that of C. elongata. Chemical analysis by coupled gas chromatography/mass spectrometry (GC/MS) of cuticular extracts obtained from C. tomentosicollis and C. elongata eggs identified fifteen compounds including ten alkanes of which the amounts varied between the two species. We speculate that Clavigralla spp. cuticular chemistry may serve as potential host location cues for Gryon sp.

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Studies of pigeonpea insect pests and their management in farmers' fields in Kenya, Malawi, Tanzania, and Uganda

Cited by 14 publications

References 0 publications

Cropping Systems, Uses, and Primary in situ Characterization of Tanzanian Pigeonpea (Cajanus cajan (L.) Millsp.) Landraces

Cropping Systems, Uses, and Primary in situ Characterization of Tanzanian Pigeonpea (Cajanus cajan (L.) Millsp.) Landraces

Field Insect Pests and Crop Damage Assessment of Pigeon Pea (Cajanus cajan [L.] Huth) grown under Ratoon and in Mixture with Maize

Exploring levels of egg parasitism and variation in egg cuticular chemistry in different Clavigralla spp.

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