scholarly journals Influence of Soil Texture, Moisture, and Surface Cracks on the Performance of a Root-Feeding Flea Beetle, Longitarsus bethae (Coleoptera: Chrysomelidae), a Biological Control Agent for Lantana camara (Verbenaceae)

2007 ◽  
Vol 36 (3) ◽  
pp. 512-517 ◽  
Author(s):  
David O. Simelane
Keyword(s):  
Biological Control ◽  
Soil Texture ◽  
Biological Control Agent ◽  
Flea Beetle ◽  
Control Agent ◽  
Lantana Camara ◽  
Surface Cracks ◽  
Root Feeding

Influence of temperature, photoperiod and humidity on oviposition and egg hatch of the root-feeding flea beetle Longitarsus bethae (Chrysomelidae: Alticinae), a natural enemy of the weed Lantana camara (Verbenaceae)

2007 ◽  
Vol 97 (2) ◽  
pp. 111-116 ◽  
Author(s):  
D.O. Simelane
Keyword(s):  
Relative Humidity ◽  
Biological Control Agent ◽  
Flea Beetle ◽  
Lantana Camara ◽  
Day Length ◽  
Threshold Temperature ◽  
Temperature Threshold ◽  
Continuous Exposure ◽  
Egg Hatch ◽  
Root Feeding

AbstractThe root-feeding flea beetle Longitarsus bethae Savini & Escalona, was introduced into South Africa as a candidate biological control agent for the noxious and invasive weed, Lantana camara L. As part of the study to predict the beetles' survival in its new range, the influence of climatic conditions on its egg development and reproductive performance were investigated in the laboratory. The threshold temperature (T°) and degree-days (DD) required for egg hatch were determined after exposing the eggs to various constant temperatures (12, 17, 22, 27 and 32°C) in separate growth chambers. The DD required for egg hatch was 178.6, and the temperature threshold required for egg hatch was 11.3°C. Survival of eggs varied from 27 to 56% at 32 and 17°C, respectively, and was optimum between 17 and 25°C. Oviposition was examined under high and low relative humidity (RH) regimes while egg hatch was determined at six RH levels, each maintained in a separate controlled growth chamber set at a constant temperature (25°C). Whilst RH had no influence on oviposition, eggs were highly susceptible to aridity, and continuous exposure to relative humidity below 63% for more than three days was wholly lethal at 25°C. Optimum egg hatch occurred at RH between 85 and 95% for up to 12 days. The effect of day length on oviposition and subsequent egg hatch was investigated under two photoperiod regimes. Neither oviposition nor subsequent egg hatch was influenced by photoperiod. The knowledge obtained will be useful for mass rearing as well as field release programmes for L. bethae.

scholarly journals Assessment of the microcyclic rust Puccinia lantanae as a classical biological control agent of the pantropical weed Lantana camara

2021 ◽  
pp. 104688
Author(s):  
Sarah E. Thomas ◽  
Harry C. Evans ◽  
Ghislaine Cortat ◽  
Christina Koutsidou ◽  
Michael D. Day ◽  
...  
Keyword(s):  
Biological Control ◽  
Biological Control Agent ◽  
Classical Biological Control ◽  
Control Agent ◽  
Lantana Camara

scholarly journals Lantana Lace Bug, Teleonemia scrupulosa Stål (Insecta: Hemiptera: Tingidae)

EDIS ◽  
1969 ◽  
Vol 2004 (9) ◽  
Author(s):  
Dale H. Habeck ◽  
Frank W. Mead ◽  
Thomas R. Fasulo
Keyword(s):  
Biological Control ◽  
Cooperative Extension ◽  
Biological Control Agent ◽  
Control Agent ◽  
Cooperative Extension Service ◽  
Lantana Camara ◽  
Extension Service ◽  
University Of Florida ◽  
Lace Bug ◽  
Extensive Damage

The lantana lace bug, Teleonemia scrupulosa Stål, often causes extensive damage to lantana, Lantana camara L. Although lantana is sometimes used as an ornamental, it is usually considered a weed. It often forms spiny, dense, impenetrable thickets covering large areas of valuable land. The lantana lace bug has been introduced into many countries as a biological control agent to combat lantana. This document is EENY-246 (originally published as DPI Entomology Circular 156), one of a series of Featured Creatures from the Entomology and Nematology Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Published: November 2001.  EENY-246/IN514: Lantana Lace Bug, Teleonemia scrupulosa Stål (Insecta: Hemiptera: Tingidae) (ufl.edu)

scholarly journals Variability in weed biological control : effects of foliar nitrogen on larval development and dispersal of the alligatorweed flea beetle, Agasicles hygrophila

2021 ◽  
Author(s):  
Harms Nathan ◽  
Cronin James
Keyword(s):  
Biological Control ◽  
Larval Development ◽  
Laboratory Experiments ◽  
Biological Control Agent ◽  
Flea Beetle ◽  
Field Measurements ◽  
Developmental Time ◽  
Control Agent ◽  
Weed Biological Control ◽  
Foliar Nitrogen

Host quality can have dramatic effects on performance of biological control agents but its importance is understudied. We used a combination of field measurements and laboratory experiments to determine the range of foliar nitrogen (FN) that larvae of the alligatorweed flea beetle (Agasicles hygrophila) are exposed to in the field and its importance to larval development and dispersal. Seasonal variability in FN was assessed at field sites spanning southern to northern Louisiana every 2–3 weeks during the growing season for four years. In a series of laboratory experiments, alligatorweed FN was manipulated to examine its influence on larval development and survival (under different temperature regimes), adult biomass, and dispersal of the biological control agent, A. hygrophila. Foliar nitrogen and rearing temperature had strong independent effects on larval development rate. We demonstrated that increasing nitrogen in leaf tissues shortens larval A. hygrophila developmental time and increases survival to adulthood, regardless of exposure temperature during development. It also suggests that foliar nitrogen may have important effects on biological control of alligatorweed, particularly as a result of seasonal variation in temperature and plant nutrition at field sites and could contribute to observed variation in A. hygrophila efficacy in the field.

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