ANNOTATED BIBLIOGRAPHY PLANT HAIRS AND INSECT RESISTANCE 15 



(78) Smith, W. T. and Cooper, B. P. 1966. alkaloid secretion of tri- 



CHOMES OF "mCOTIA.Na" SPECIES AND RESISTANCE TO APHIDS. Ent. Exp. 



Appl. 9: 428-432. 

 Nicotine, anabasine, and probably nornicotine were identified in the tri- 

 chome secretions of various Xicotiana spp. 



(79) Parr. J. C. and Smith. W. T. 1966. the phylogeny of "nicotiana" 



and resistance to insects. Fourth Int. Tobacco Sci. Congr. Proc. The 

 Natl. Tobacco Board of Greece. Athens, pp. 424-430. 



Adults and nymphs of Myzus persicae were killed by contact with such al- 

 kaloids as nicotine and anabasine, which are secreted by certain plant tri- 

 chomes of Xicotiana. Small larvae of Manduca sexta were also killed by top- 

 ical applications of these secretions. 



(80) and Webster. J. A. 1962. toxicity of "nicotiana gossei" domin to 



"myzus persicae'" (sulzer). Ent. Exp. Appl. 5: 233-238. 



Materials exuded from the leaf hairs of Xicotiana spp. were toxic to Myzus 

 persicae, Rhopalosiphum padi (L.), and Acyrthosiphon pisum (Harris). The 

 symptoms of such poisoning resemble those of nicotine poisoning. 



SORGHUM 



(81) Blum. A. 1968. anatomical phenomena in seedlings of sorghum vari- 



eties resistant to sorghum shoot fly ("atherigona varia soccata"). 



Crop Sci. 8: 388-390. 

 The resistant cultivars of Sorghum possessed a much greater density of sil- 

 ica bodies (dumbbell-shaped, intercostal, and silicified prickle hairs) in the 

 abaxial epidermis at the base of the first, second, and third leaf sheaths. 



STRAWBERRIES 



(82) Kishaba. A. X.. Yoth. V. Howland. A. F. and others. 1972. twospotted 



spider mite resistance in California strawberries. J. Econ. Ent. 65: 

 117-119. 

 Highly susceptible clones of Fragana spp. appeared to be more pubescent 

 than those that were less susceptible to Tetranychus urticae. 



SUGARCANE 



(83) Agarwal. R. A. 1969. morphological characteristics of sugarcani 



and insect resistance. Ent. Exp. Appl. 12: 767-776. 

 Clones of Saccharum sp. with a low number of stomata and spines on their 

 leaves and a small number of stomata on the stalks were susceptible to the 

 whitefly (Aleurolobus barodensis (Maskell) ) and the scale insect (Me/anaspis 

 glomerata (Green) ). 



(84) Yerma. S. C, and Mathur. P. S. 1950. the epidermal characters of 



sugarcane leaf in relation to insect pests. Indian J. Agr. Sci 20: 

 387-389. 



Varieties of Saccharum sp. with high spine density along the lower surface 

 of the leaf midribs were less susceptible to attack by larvae of Scirpophaga 

 mvella (F.) than varieties with less spine density. 



