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The enemy of my enemy is my friend

EPN- Entomopathogenic nematode

  • Infect insect pests
  • =>reduce insect pest damage to crops
  • => improves food production
  • no harmful effect on humans and nematodes remain in soil

Prof AP Malan

ANTIXENOSIS (Non-Preference)

Exploring an Unseen World - Nematology

Raymond L. Collett

22847650@g.nwu.ac.za

Unit for Environmental Sciences and Management

Potchefstroom

Anti- (Greek) Against, opposed to. Xenos (Greek) Stranger.

According to Kogan & Ortman (1978) it is a type of resistance that triggers the response or behavioral process of the pest insect to consider the host plant as a "non-preference" resulting in avoidance of the host plant as a source of food or oviposition substrate.

"Keeps the guest away"

The not so good, the bad, ugly (Part 1)

  • Syptoms above ground
  • wilting, chlorosis, stunted growth, 2nd infection, seed galling, death => yield loss

Reasons for GHPR

  • Self-renewing in nature
  • controls itself
  • built into the seed
  • control extends into generations
  • potentially indefinite
  • Advantage in low-input farming
  • GHPR cost no more than planting
  • "saves" resources
  • Improves development of IPM
  • biological control & GHPR

Nema-whaaaaat?

  • a.k.a. "roundworms"
  • aquatic animals
  • feed on animals, plants, bacteria, fungi, other nematodes
  • can be 'good' (free-living) or 'bad' (parasitic)
  • more than 20 000 species
  • 50 micometers to 7 meters long
  • 100 nematodes per teaspoon soil
  • can be found as deep as 3.6 km

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