Effects of leaf compounds, climate and natural enemies on the incidence of thrips in cassava

Leite, Germano Leão Demolin; Picanço, Marcelo Coutinho; Jham, Gulab N.; Gusmão, Marcos Rafael

doi:10.1590/s0100-204x2002001100018

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…and those of the subfamily Asopinae, Trybonia sp., and Chrysoperla sp. These predators are important in different ecosystems (Molina-Rugama et al 1998;Landis et al 2000;Almeida et al 2006;Mizell 2007;Oberg et al 2008;Venturino et al 2008;Leite et al 2002Leite et al , 2003Leite et al , 2005aLeite et al ,b, 2006bLeite et al , 2007.…”

Section: Discussionmentioning

confidence: 99%

Seasonal Abundance of Hemipterans onCaryocar brasiliense(Malpighiales: Caryocaraceae) Trees in the Cerrado

Leite

Veloso

Zanúncio

et al. 2012

Florida Entomologist

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Section: Discussionmentioning

confidence: 99%

Seasonal Abundance of Hemipterans onCaryocar brasiliense(Malpighiales: Caryocaraceae) Trees in the Cerrado

Leite

Veloso

Zanúncio

et al. 2012

Florida Entomologist

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“…In addition, this leaf region has better nutritional qual-ity than the adaxial one. and sucking phytophagous insects and mites prefer the abaxial surface of upper leaves (or growth points) (Miranda et al 1998;Silva et al 1998;Leite et al 1999Leite et al , 2002Leite et al , 2003. The resistance of the abaxial surface tissue to piercing is lower (due to the presence of lacunary parenchyma) than that of the adaxial side (with palisade parenchyma), which favors greater suction of the phloem sap on the abaxial surface (Chu et al 1995(Chu et al , 2007.…”

Section: (6)mentioning

confidence: 99%

Spatial Distribution of Phytophagous Insects, Natural Enemies, and Pollinators onLeucaena leucocephala(Fabaceae) Trees in the Cerrado

Damascena

Leite

Silva

et al. 2017

Florida Entomologist

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Leucaena leucocephala (Lam.) de Wit (Fabaceae) is widely used to regenerate degraded landscapes in tropical and subtropical regions and serves as a protein source for animals in agrosilvopastoral systems. Thus, our objective was to assess the spatial distribution of insects on the tree crown (vertical: upper, middle, and basal canopy; horizontal: north, south, east, and west) and leaf surfaces (adaxial and abaxial) of L. leucocephala. Phytophagous insects, natural enemies, and pollinators were quantified fortnightly in 20 trees for 2 yr. North-facing tree branches had the greatest numbers of phytophagous insects, natural enemies, and pollinators. Branches facing west had the most species-rich and biodiverse phytophagous and pollinator assemblages, whereas for natural enemies, species richness and biodiversity were greatest on branches facing north or south. The greatest numbers of individuals and highest levels of species richness of phytophagous insects, natural enemies, and pollinators were observed in the upper and middle parts of the L. leucocephala canopy. The most individuals and highest levels of species richness and biodiversity for phytophagous insects, natural enemies, and pollinators were observed on the abaxial face of L. leucocephala leaves. The species with the highest abundance and k-dominance (common or constant species) on L. leucocephala trees were the phytophagous insects Trigona spinipes F. (Hymenoptera: Apidae: Meliponinae) and Tropidacris collaris Stoll (Orthoptera: Romaleidae) and the natural enemies Camponotus sp.2 (Hymenoptera: Formicidae) and Brachymyrmex sp. (Hymenoptera: Formicidae). These results can inform strategies related to pest control and maintenance of natural enemies and pollinators in L. leucocephala plantations. Biopesticide application, for example, may be more effective at eliminating target organisms if directly applied on their preferred sites, and a targeted application can minimize negative effects for non-target organisms.

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Spatial and Temporal Variation in Chaetanaphothrips orchidii Moulton (Thysanoptera: Thripidae) Population and Its Damage on Lemon

et al. 2012

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Chaetanaphothrips orchidii Moulton has recently been detected in lemon (Citrus limon) orchards in northwest Argentina, causing high levels of damage on fruits. Severe damage results in the rejection of fruit for export, which must then be sold in the industry. However, the restrictions imposed by the citrus industry on insecticide residues sometimes also result in fruit rejection. Here, we studied the ecology and behavior of C. orchidii in order to propose a pest management strategy that could meet both export and industry demands. Seasonal occurrence and canopy distribution of C. orchidii in lemon orchards were evaluated, and field experimental manipulations of thrips populations were performed to analyze how the length (45, 100, 130, and 200 days) and timing (January, February, or March) of C. orchidii activity related with fruit damage. Lemons harvested during summer showed lower infestation levels (∼0.64 individual per fruit) than those harvested in winter (∼1.88 individuals per fruit). Higher proportions of damaged fruits were recorded in the lower part of the tree. Changes in the population levels of C. orchidii were closely associated with fruit phenology. The longer the lemon fruits were exposed to the thrips, the higher was the damage. However, the time of infestations did not affect fruit damage. Our data provide a first step towards understanding the factors that determine the severity of fruit damage caused by C. orchidii in northwest Argentina.

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Effects of leaf compounds, climate and natural enemies on the incidence of thrips in cassava

Cited by 4 publications

References 9 publications

Seasonal Abundance of Hemipterans onCaryocar brasiliense(Malpighiales: Caryocaraceae) Trees in the Cerrado

Seasonal Abundance of Hemipterans onCaryocar brasiliense(Malpighiales: Caryocaraceae) Trees in the Cerrado

Spatial Distribution of Phytophagous Insects, Natural Enemies, and Pollinators onLeucaena leucocephala(Fabaceae) Trees in the Cerrado

Spatial and Temporal Variation in Chaetanaphothrips orchidii Moulton (Thysanoptera: Thripidae) Population and Its Damage on Lemon

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