Title: Host range of Hemicycliophora poranga and its pathogenicity on tomato
Abstract: Summary- Hemicycliophoraporanga was extracted from soil around Musa sp. in California, USA. The nematode was cultured on tomato cv. Big Boy. After 31 days at 25 oC, final nematode populations and reproductive indices increased on cabbage, cowpea, bean and okra, and similar increases in final nematode populations were obtained on lettuce and tomato cv. VF 145-B 7879, after 72 days. Pepper, onion and cucumber sustained low to zero nematode populations and were considered non-hosts. Two-week-old tomato cv. Big Boy plants inoculated with 0, 100, 500, 1000, 5000, 10 000, and 20000 nematodes resulted in significantly lower shoot lengths and root weights at Pi 5000 and Pi 20 000 than at Pi 0 and Pi 10 000, 44 days after inoculation. After 28 days, with eight-week-old tomato cv. Big Boy plants, oruy root weights were lower at Pi 1000 than all other Pi levels, except Pi 5000. In both cases, nematode populations increased significantly at all Pi levels, except Pi 0 (P < 0.05). Hemicycliophora poranga fed primarily on lateral root primordia, and occasionally on primary root tips. Feeding resulted in the formation of small galls. During feeding, a polysaccharide plug and feeding tube were observed around the stylet and at the feeding site, respectively.
Publication Year: 1993
Publication Date: 1993-01-01
Language: en
Type: article
Access and Citation
Cited By Count: 6
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot