ANNOTATED BIBLIOGRAPHY PLANT HAIRS AND INSECT RESISTANCE H 



(49) 1959. LABORATORY STUDIES OF FEEDING AND OVIPOSITION PREFERENCES 



of "anthonomus grandis" boh. J. Econ. Ent. 52: 390-396. 

 Hairiness of the flower buds of Gassy pium discouraged feeding of Antho- 

 nomus grandis when an alternative choice of glabrous buds was available. 



(50) and Lee. H. S. 1961. further studies on the feeding and oviposi- 



TION PREFERENCES OF THE BOLL WEEVIL (" ANTHONOMUS GRANDIS" J. EcOIT. 



Ent. 54: 1085-1090. 

 The boll weevil resistance associated with hairiness in Gossypium was sep- 

 arated into two categories : 1 . Mechanical resistance — the bracteoles of hairy 

 plants are ' 'sealed' ' during the early stages of development, thus temporarily 

 protecting the enclosed flower buds from damage. 2. Presumed antibiotic 

 effects — larvae of Anthonomus grandis were found to develop less rapidly in 

 hairy than in nonhairy buds. 



(51) Tidke. P. ML, and Sane. P. Y. 1962. jassid resistance and morphology 



of cotton leaf. Indian Cotton Grow. Rev. 16: 324-327. 



Lamina thickness was the character that had the highest correlation with 



jassid resistance of Gossypium hirsutum and G. harbadense. Other characters 



which influenced resistance were angle of insertion of leaf hair, length of 



hair, number of hairs per unit length of leaf veins, and hairs on the lamina. 



(52) Wannamaker. \V. K. 1957. the effect of plant hairiness of cotton strains 



on boll weevil attack. J. Econ . Ent. 50: 418-423. 

 Differences in the positions and characteristics of plant hairs in Gossypium 

 spp. were discussed in relation to their possible importance in resistance to 

 Anthonomus grandis. Resistance may be conditioned by hair length, density, 

 and position. 



(53) Wessling. W. H. 1958. resistance to boll weevil in mixed populations of 



RESISTANT AND SUSCEPTIBLE COTTON PLANTS. J. Econ. Ent. 51: 502-506. 



The reliability of resistance to attack by Anthonomus grandis, conferred by 

 the mutant gene. H 2 . was tested under different environmental conditions . The 

 mutant Gossypium strain. Pilose, showed a significantly lower proportion of 

 egg- laying punctures throughout the investigation. 



(54) 1958. GENOTYPIC REACTIONS TO BOLL WEEVIL ATTACK IN UPLAND COTTON. 



J. Econ. Ent. 51: 508-512. 

 Mutant lines of Upland cotton carrying any two of four mutant genes, Hf, 

 H 2 , gl, and R x . were tested together with lines that have the same genetic 

 background but that differ by opposite alleles to the genes under test. All 

 mutant Gossypium lines tested showed varying degrees of resistance to at- 

 tack by Anthonomus grandis. 



CUCURBITACEAE 



(55) El Khidir. E. 1965. bionomics on the cotton whitefly "bemisia tabaci" 



GENN. ) IN THE SUDAN. AND THE EFFECTS OF IRRIGATION ON POPULATION DEN- 

 SITY of whiteflies. Sudan Agr. 1: 8-22. (R.A.E. 57: 231.) 

 Hairy leaves cucurbits and Solanum melongena L. caused irregularities 

 of pupal margins of Bemisia tabaci and affected the number and distribu- 

 tion of the dorsal spines. 



