The effect of different ways of watering pots after the application of aldicarb on control of the potato cyst-nematode

Abstract

The multiplication of Heterodera rostochiensis on potatoes in pots was reduced more strongly by aldicarb mixed with the soil than by aldicarb applied to the top of the soil. Excessive amounts of water strongly reduced the effectiveness of the first method of application; moderate amounts of water did not improve the second method sufficiently.

Distribution of nematicides in soil and its influence on control of cyst‐nematodes (Globodera and Heterodera spp.)

“…Thus the invasion of potato roots by potato cyst-nematode larvae after 32 days progressively diminished as oxamyl granules were mixed more uniformly into the soil, but invasion was little affected by the pattern of distribution of fenamiphos. In contrast, increase of potato cyst-nematode was little affected by the oxamyl distribution, except that distribution in the surface was ineffective, a result similar to that obtained by Den Ouden (1977) with aldicarb. With fenamiphos only the uniform distribution of the chemical (mixed to 10 or 20 cm) lessened nematode increase.…”

The effect of some systemic nematicides on the control of Heterodera rostochiensis in the field

“…This is presumably caused by the 15 cm-deep rotavation after the application of the chemicals; this is confirmed by the pot trials mentioned in the introduction and by another greenhouse experiment (Den Ouden, 1977) where aldicarb was mixed in or applied to the soil in different ways. Furthermore it was found (Den Ouden, 1975) that the effect of aldicarb applied on the surface of pots at higher initial densities was density dependent and that the effect of the treatment on the multiplication decreased strongly with depth in the pots.…”