Effect of a plant growth regulator prohexadione-calcium on insect pests of apple and pear

G. S. Paulson, L. A. Hull, David Biddinger

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The effect of prohexadione-calcium, a plant growth regulator that inhibits gibberellin metabolism, on Cacopsylla pyricoloa (Foerster) in pear trees, and Choristoneura rosaceana (Harris) and Aphis spireacola Patch, in apple trees was studied. C. pyricoloa and A. spireacola populations were significantly reduced in prohexadione-calcium-treated pear and apple, respectively. Insecticide control of both pests with imidacloprid was synergized in treatments with prohexadione-calcium. In apples treated with prohexadione-calcium, there was a significant reduction in the number of C. rosaceana shelters per tree and amount of fruit injury at harvest attributable to the C. rosaceana. There was an additive effect when tebufenozide was used to control C. rosaceana in trees treated with prohexadione-calcium. Prohexadione-calcium significantly reduced vegetative growth in both pears and apples. Synergistic and additive treatment effects of prohexadione-calcium and pesticides used in this study may be due to better penetration and coverage of pesticides due to reduced foliar growth or to changes in the nutritional quality of the host plants.

Original languageEnglish (US)
Pages (from-to)423-431
Number of pages9
JournalJournal of economic entomology
Volume98
Issue number2
DOIs
StatePublished - Jan 1 2005

Fingerprint

growth regulator
plant growth substances
pears
insect pests
Choristoneura rosaceana
apples
calcium
insect
pesticides
pesticide
Cacopsylla
tebufenozide
imidacloprid
prohexadione calcium
pest
effect
additive effect
pest control
shelter
gibberellins

All Science Journal Classification (ASJC) codes

  • Ecology
  • Insect Science

Cite this

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abstract = "The effect of prohexadione-calcium, a plant growth regulator that inhibits gibberellin metabolism, on Cacopsylla pyricoloa (Foerster) in pear trees, and Choristoneura rosaceana (Harris) and Aphis spireacola Patch, in apple trees was studied. C. pyricoloa and A. spireacola populations were significantly reduced in prohexadione-calcium-treated pear and apple, respectively. Insecticide control of both pests with imidacloprid was synergized in treatments with prohexadione-calcium. In apples treated with prohexadione-calcium, there was a significant reduction in the number of C. rosaceana shelters per tree and amount of fruit injury at harvest attributable to the C. rosaceana. There was an additive effect when tebufenozide was used to control C. rosaceana in trees treated with prohexadione-calcium. Prohexadione-calcium significantly reduced vegetative growth in both pears and apples. Synergistic and additive treatment effects of prohexadione-calcium and pesticides used in this study may be due to better penetration and coverage of pesticides due to reduced foliar growth or to changes in the nutritional quality of the host plants.",
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Effect of a plant growth regulator prohexadione-calcium on insect pests of apple and pear. / Paulson, G. S.; Hull, L. A.; Biddinger, David.

In: Journal of economic entomology, Vol. 98, No. 2, 01.01.2005, p. 423-431.

Research output: Contribution to journalArticle

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