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*0729 Panda, N. ; Raju, A.K. 1972. Varietal resistance of green gram<br />

(Phaseolus aureus Roxb.) to Aphis craccivora (Koch) [Hung beansj. INDIAN<br />

JOURNAL OF AGRICULTURAL SCIENCES, v.42(b):670-673. [En] [En Abst]<br />

(REP .MB-0189)<br />

Twenty five varieties of mungbean (Vigna radiata) were screened for<br />

resistance to Aphis craccivora (Koch) under field conditions at Bhubaneswar<br />

during the winter season of 1969 and the summer and rainy seasons of 1970. The<br />

average nimber of aphids, both nymphs and adults, per plant was used to compare<br />

the level or resistance betwcen varieties. The intensity of damage by yellow<br />

mosaic virus was also recorded. 'BR 2', 'NP 18', 'Kopergaon' and 'Green (4 n)'<br />

were resistant to the aphid, whereas 'Shining', 'Khargaon', 'Balsakhi', 'T 51'<br />

'Kiloga', 'Peru', 'Lincon' and 'Beerkun' were susceptible. 'Angul 3-6' proved<br />

moderately resistant to the aphid and to the yellow mosaic virus, an antibiosis<br />

study revealed that the fecundity of aphids feeding on resistant varieties was<br />

almost half that of the insect teeding on susceptille ones. The nymphal weight<br />

was lower and the duration of life cycle longer in insects fed on resistant<br />

entries. [ASJ<br />

*0730 Hamid, S. ; Shah, M.A. ; Anwar, A.M. 1977. Some ecological and<br />

behavioural studies on Aphis craccivora Koch (Hem.: Aphididae). COMMONWEALTH<br />

INSTITUTE OF BICLOGICAL CONTROL, TECHNICAL BULLETIM, no.18:99-Iil. [En] [En<br />

Abst] (REP.MB-2738)<br />

Investigations on biology, ecology, behaviour and natural enemies of Aphis<br />

craccivora Koch were conducted in Pakistan during 1967-1970. Aphis craccivora<br />

exhibited seasonal and crop-wise polymorphism. Anholocyclic infestations were<br />

maintained on 9 summer plants, 18 winter and 3 perennials. Of these Arachis<br />

hypogaea, Cyamopsis tetragonolobus, Vigna radiata and V. sinensis (summer),<br />

Medicago sativa (perennial), and Vicia faba (winter) were important. Host<br />

preference was related to reproduction on different olant species. Aphidius<br />

absinthii, Aphelinus basalis, Ephedrus sp. nr. cerasicola, Trioxys ? sJnensis,<br />

Lysiphlebus fabarum and Aphidencyrtus aphidivora parasitised the apl'id while<br />

two Anthocorids, one Chamaemyiid, one Chrysopid, nine Coccinellids and nine<br />

Syrphids preyed on it. Ants, Pheidole sp. and Monomorium Indicum, were<br />

associated with A. czaccivora in 90% of the sites examined. Their symbiotic<br />

influence appeared to work in favour of the aphid. [ASJTHH]<br />

*0731 Raju, A.K. ; Panda, N. i983. Observations on the biology of Aphis<br />

craccivora Koch on five varieties of greengram. INDIAN JOURNAL OF<br />

AGRICULTURAL SCIENCES, v.53(9):86g-869. [En] (A:VS)<br />

A laboratory study on the possible antibiosis of mungbeans to Aphis<br />

craccivora was conducted in India. On a susceptible variety, Shining, the adult<br />

aphid could significantly attain higher fecundity, higher body weight, shorter<br />

nymphal period and longer duration than the moderately resistant varieties of<br />

Angul 3-6 and NP 18 and r,sistant varieties of Kopergaon and Green 4n. There<br />

was no significant difference between Angul 3-6 and NP 18 in respect of<br />

oviposition. [THH]<br />

OTHER POLYPHALOUS INSECTS<br />

191

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