Journal of Pest Science (2009) 82, 95-99

Mehmet Kubilay Er, Ayhan Gökçe and Mark Edward Whalon (2009)
Contact and ingestion toxicities of plant extracts to Thaumetopoea solitaria Frey. (Lepidoptera: Thaumetopoeidae)
Journal of Pest Science 82 (1), 95-99
Abstract: Thaumetopoea solitaria is a serious pest of pistachio throughout the Mediterranean and the surrounding region. In this study, contact and ingestion toxicities of Bifora radians, Fumaria officinalis, Humulus lupulus and Rhododendron ponticum extracts against T. solitaria larvae were examined under laboratory conditions. Dimethoate was used as a positive control. In the contact toxicity bioassays B. radians extract was the most toxic, causing 32% mortality. In the ingestion toxicity bioassays H. lupulus extract was the most active, causing 83% mortality after 48 h. This shows that H. lupulus is acting as a stomach poison. The LC₅₀ and LC₉₀ values for H. lupulus ingestion toxicity bioassays were 1.7 and 8.7%, respectively. The LT₅₀ value was 29.3 h. Since H. lupulus extract caused >50% mortality even 6 days after application, its long lasting residual effect promises fewer applications. These results imply that H. lupulus has potential for use as a crop protectant against T. solitaria.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Mehmet Kubilay Er, Mark E. Whalon, Ayhan Gökçe

Research topic(s) for pests/diseases/weeds:
control - general

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Thaumetopoea solitaria	Pistachio nut and relatives (Pistacia)	Turkey