Physiological response of Parthenium hysterophorus to defoliation by the leaf-feeding beetle Zygogramma bicolorata

Parthenium hysterophorus Linn. is one of the most aggressive, invasive weeds threatening natural and agricultural ecosystems in Nepal. Leaf feeding beetle, Zygogramma bicolorata Pallister (Coleoptera: Chrysomelidae), is regarded as a potential candidate for biological control of Parthenium weed. Considering the fact effectiveness of Z. bicolorata against P. hysterophorus was evaluted in Nepal. Z. bicolorata caused 98.25 % defoliation of P. hysterophorus reducing 38.88 % plant height, 27.29 % plant width, 26.25 % root length, 12.33 % leaves, 40.58 % shoot biomass and 36.59 % root biomass in the period of 90 days. The flower production and soil seed bank were reduced by 50.22 % and 40.29 %, respectively. Z. bicolorata was an efficient bio-control agent with a significant negative effect on the vegetative and reproductive performance of the noxious weed P. hysterophorus.

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Stage specific feeding attributes and mobilization of nutrients in Mexican beetle, Zygogramma bicolorata Pallister on Parthenium hysterophorus L.

Journal of Asia-Pacific Entomology ◽

10.1016/j.aspen.2020.02.004 ◽

2020 ◽

Vol 23 (2) ◽

pp. 310-314

Author(s):

Priya Patel ◽

Shailesh Singh ◽

Arvind Kumar Patel ◽

Bhupendra Kumar ◽

Arvind Kumar Singh ◽

...

Keyword(s):

Parthenium Hysterophorus ◽

Zygogramma Bicolorata

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Biocontrol efficiency of Zygogramma bicolorata at different growth stages of Parthenium hysterophorus

Indian Journal of Weed Science ◽

10.5958/0974-8164.2016.00120.9 ◽

2016 ◽

Vol 48 (4) ◽

pp. 460 ◽

Cited By ~ 2

Author(s):

Asad Shabbir ◽

Sheema Sadia ◽

Iram Mujahid

Keyword(s):

Parthenium Hysterophorus ◽

Growth Stages ◽

Zygogramma Bicolorata ◽

Different Growth Stages

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Diapause behaviour of Zygogramma bicolorata (Coleoptera: Chrysomelidae), a biological control agent for Parthenium hysterophorus (Asteraceae), in Bangalore, India

Bulletin of Entomological Research ◽

10.1017/s000748530002928x ◽

1993 ◽

Vol 83 (3) ◽

pp. 383-388 ◽

Cited By ~ 14

Author(s):

K. P. Jayanth ◽

Geetha Bali

Keyword(s):

Biological Control ◽

Biological Control Agent ◽

Extended Period ◽

Control Agent ◽

Parthenium Hysterophorus ◽

Continuous Exposure ◽

Zygogramma Bicolorata ◽

Before And After ◽

Summer Temperatures ◽

Over Time

AbstractZygogramma bicolorata Pallister was introduced for biological control trials against the weed Parthenium hysterophorus (Asteraceae) in India. The insect entered diapause over an extended period of time between July and December in Bangalore. Diapausing adults burrowed into the soil, and emerged in May–June with the commencement of monsoon rains. Percentage diapause increased over time, peaking at 72% during November. Non-diapausing adults were capable of breeding, under laboratory conditions, during the winter. Some adults bred both before and after diapause, during two consecutive years. Soil moisture played an important role in providing the conditions for burrowing or emerging from the diapause chambers. The studies also showed that diapausing adults had to be exposed to the high summer temperatures, for termination of the diapause. It was possible to break diapause by continuous exposure to 30°C, 35°C and 40°C for 22 days, nine days and 10 hours, respectively, during February–March, about three months after its inception. This method can be used to initiate mass multiplication for carrying out releases early in the season.

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