000			01525nab a22003497a 4500
001			G59605
003			MX-TxCIM
008			121211b |||p||p||||||| |z||| |
040			_aMX-TxCIM
041	0		_aEn
043			_aNL
072		0	_aH10
082	0	4	_a82-800633
100	1		_aRabbinge, R.
245	0	0	_aDamage effects of cereal aphids in wheat
260			_c1981
340			_aPrinted
500			_a21 ref.; Summaries (En, Nl)
520			_aLaboratory and field studies on aphid damage in wheat are described. Both direct and indirect effects of aphids on the behaviour of the crop were studied. In the laboratory a clear effect of honeydew and yeasts on photosynthesis was foumd. This effect could not be demonstrated under field conditions, since even at yield loss levels of 700 kg/ha the size of this effect may be undetectable with crop enclosures reaching an accuracy of 10%. The effect of honeydew on ageing, measured in the laboratory trials was also found in the field and may form a major cause of the yield losses found in the field. Yield losses under field conditions
546			_aEnglish
591			_aCOMOD
595			_aAC
650	1	0	_aInjurious insects
650	1	0	_aPests of plants _91201
650	1	0	_aWheat triticum spp.
700	1		_aDrees, E.M., _ecoaut.
700	1		_aGraaf, M. van der, _ecoaut.
700	1		_aVerberne, F.C.M., _ecoaut.
700	1		_aWesselo, A., _ecoaut.
773	0		_tNetherlands Journal of Plant Pathology _n82-800633 _gv. 87, no. 6, p. 217-232
942			_cJA
999			_c17403 _d17403