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- Author or Editor: Kenneth S. Rymal x
Abstract
Compounds active as feeding stimulants for cowpea curculio (Chalcodermus aeneus Boheman) were quantitatively determined by laboratory bioassays in pods of 5 cultivars of southernpeas (Vigna unguiculata (L.) Walpers). Feeding response was tested on intact sections of fresh pods and on filter paper wrapped plugs of agar and water-extracts of hulls with seeds removed. Water extracts were partitioned with ether and the tests of the activity of both fractions indicated that the active compounds were lipid in nature. Active compounds extracted from a susceptible cultivar were added to the extract of a resistant cultivar and feeding response was increased nearly 10 fold.
Quantitative and qualitative differences in fatty acid composition between resistant and susceptible cultivars were shown by gas chromatography. The amounts of eicosenoic acid were directly related to curculio feeding response to the cultivars.
Abstract
‘AU-Producer’ is a new plum cultivar (Fig 1) developed by the Department of Horticulture, Auburn University Agricultural Experiment Station for growing in central Alabama, where sufficient chilling of 750 hr of temperature below 7.2° C (45° F) occurs. ‘AU-Producer’ has proven its ability to produce high yields of high quality fruit where certain fruit and disease problems occur.
The cross was made in 1965 and the seedling was selected in 1967 and tested as Bruce 13-18 (Fig. 2).
Abstract
‘Auburn 76’ FMN, herein referred to as ‘AU 76’, is an indeterminate true breeding fresh market tomato cultivar named in honor of America’s Bicentennial and released by the Alabama Agricultural Experiment Station (Fig. 1). ‘AU 76’ possesses 3 dominant genes (I, Tm2a and Mi) conditioning, respectively, near-immunity to both Fusarium race 1 (F) and tobacco mosaic virus (M), and resistance to root knot nematodes (N).
Abstract
Volatile extracts were isolated from pods of southernpea by vapor-phase ether extraction. In bioassays conducted with freshly emerged adult curculios Chalcodermus aeneus (Boh.), the insects were significantly more attracted to extracts of the susceptible ‘California Blackeye No. 5’ than to air with no extracts. Extracts of the breeding lines Ala. 963.8 and CR 22-2-21 were repellent to the insects as evidenced by directed travel away from the extracts towards air alone. Gas chromatographic profiles of the 3 extracts showed obvious qualitative and quantitative differences.