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Table 1 Documented releases, establishment and iNaturalist observations of Pareuchaetes pseudoinsulata in South and South-East Asia

From: Citizen science to monitor the establishment and spread of a biological control agent: the case of Pareuchaetes pseudoinsulata (Lepidoptera, Erebidae) for the control of Chromolaena odorata (Asteraceae) in South and South-East Asia

Release country and dates of release (Winston et al. 2023)

Reported result (Winston et al. 2023 and references therein)

iNaturalist Pareuchaetes observations/total Lepidoptera observations = percentage

Implications of iNaturalist observations (regions)

Countries with deliberate releases

 India, 1973, 1984

Established

163/448,347 = 0.04%

Establishment confirmed (Andhra Pradesh, Karnataka, Kerala, Tamil Nadu)

 Indonesia, 1992

Established in Sumatra, East Kalimantan and South Sulawesi; not established in Java, West Timor where released

0/58,823

Establishment not confirmed

 Malaysia, 1970

East Malaysia (Sabah): established

West Malaysia: not released, not present

East: 0/26,144

West: 3/181,920 ≤ 0.01%

East Malaysia: establishment not confirmed

West Malaysia: presence demonstrated in Penang

 Sri Lanka, 1973

Established

22/17,768 = 0.12%

Establishment confirmed (widespread)

 Thailand, 1987, 2006

Not established

72/88,942 = 0.08%

Establishment demonstrated (widespread)

 Vietnam, 1988

Not established

3/15,181 = 0.02%

Establishment demonstrated (Ho Chi Min City, Haiphong)

Countries with no official releases

 Brunei

No releases; established

0/1,207

Presence not confirmed

 Cambodia

No releases

1/12,876 = 0.01%

Presence demonstrated (Koh Kong)

 China

No releases

6/83,780 ≤ 0.01%

Presence demonstrated (Yunnan, Hainan provinces)

 Philippines

No releases; present on Palawan, Mindanao, Bohol and Leyte islands

9/23,880 = 0.04%

Presence confirmed (Cebu and Leyte islands in Visayas, Mindanao island)