000			02600nab a22003017a 4500
001			G69531
003			MX-TxCIM
005			20230208175721.0
008			121211b |||p||p||||||| |z||| |
022			_a0073-2230
024			_2https://doi.org/10.3733/hilg.v31n08p279
040			_aMX-TxCIM
041			_aeng
090			_aREP-1009
100	1		_aBindra, O.S. _929987
245	1	0	_aEffect of insect numbers on aphid transmission of potato leafroll virus
260			_c1961. _aOakland, CA (USA) : _bUniversity of California Division of Agriculture and Natural Resources,
340			_aPrinted
520			_aIt is generally agreed that inoculations by individuals of a group of vectors are separate and independent events, and that virus transmission efficiency by groups of insects will follow that predicted by probabilities generated by expansion of the binomial theorem (Watson, 1936); (Storey, 1938); (Watson and Roberts, 1939); (Posnette and Robertson, 1950); (Storey and Ryland, 1955); (Sylvester, 1955, 1956). However, (Kirkpatrick and Ross (1952)) reported that in the transmission of potato leafroll virus by Myzus persicae (Sulz.) to Physalis angulata the rate of successful inoculation by groups was lower than expected on the basis of this hypothesis, and that the efficiency of individuals in a group decreased as the size of the group was increased. They considered that this could be due to one or more of the following: (1) the presence of immune or highly resistant plants in the test plant population which would not become systemically infected in spite of the presence of relatively large numbers of vectors per plant and relatively long inoculation access periods; (2) interference of aphids with one another which could prevent feeding by any one of them for a period long enough for transmission of this virus; and (3) aphids feeding for relatively long periods tended to cause the test plants to become more resistant to systemic infection by this virus. A fourth hypothesis (4) might be added, viz., that such observations are due to chance variation. In the following work, tests were designed in an attempt to specifically test each of these four hypotheses.
546			_aText in English
595			_aRPC
650		7	_2AGROVOC _929988 _aPotato leafroll virus
650		7	_2AGROVOC _910531 _aAphidoidea
650		7	_2AGROVOC _94323 _aViroses
700	1		_aSylvester, E.S. _929989
773	0		_tHilgardia _gv. 31, no. 8, p. 279-325 _dOakland, CA (USA) : University of California Division of Agriculture and Natural Resources, 1961. _wG445482 _x0073-2230
942			_cJA _2ddc
999			_c20149 _d20149