Resistance inCucumis sativusL. toTetranychus urticaeKoch. 4. The genuineness of the resistance

✍ Scribed by O. M. B. Ponti

• Publisher: Springer
• Year: 1978
• Tongue: English
• Weight: 266 KB
• Volume: 27
• Category: Article
• ISSN: 0014-2336
• DOI: 10.1007/bf00043169

✦ Synopsis

For several generations subpopulations of the twosponed spider mite were reared on cucumber varieties previously selected as partially resistant. Subsequently resistance tests were carried out in the laboratory and the glasshouse with mites from these subpopulations and concurrently with mites from a basic population reared on a susceptible cucumber line. In these tests neither acceptance nor net reproduction or damage index on the partially resistant varieties depended on the kind of mite populations used as inoculum. Therefore it is concluded that the resistance is genuine. The stability of the resistance is discussed.