Report of the Station of Applied Zoology
- (1977). Report of the Station of Applied Zoology In: Gembloux - Rapport d'Activite 1976. Gembloux Belgium, Centre de Recherches Agronomiques de l'Etat.
|Chapter title||Report of the Station of Applied Zoology|
|Book title||Gembloux - Rapport d'Activite 1976.|
|Publisher||Centre de Recherches Agronomiques de l'Etat.|
|Endnote Keywords||control|acaricides|insecticides|apples|pest control|integrated control|dicofol|parathion|diazinon|phosalone|pirimicarb|grain crops|predators|barley|biology|ecology|agricultural entomology|prey|Station of Applied Biology, Gembloux|insecticide-pathogen mixt|
|Abstract||This report from the Station of Applied Zoology in Gembloux, Belgium, for 1976, contains 6 articles of which the following are of entomological interest:[Integrated control in an apple orchard] Lutte integree en verger de pommiers, by N. Malavez (Fr, pp. 49-51). In 1976, the usual 6 insecticide applications were reduced to 4 (1 at the end of May against the grey apple aphid [Dysaphis plantaginea (Pass.)], tortricids and noctuids, 2 in June against the first generation of codling moth [Cydia pomonella (L.)] and 1 in August against the second generation) and a mixture of a preparation of Bacillus thuringiensis with phosalone and pirimicarb was used for all applications on the 'integrated control' plot, as distinct from the 'chemical control' plot, which received 1 application of diazinon and 1 of parathion in May, 3 of parathion in June and August against C. pomonella and 1 of dicofol against Panonychus ulmi (Koch) in mid-July. In both plots, the populations of P. ulmi and C. pomonella were above the economic threshold, and in the 'integrated control' plot infestation of fruit by Archips sp. was also unacceptably high for commercial purposes. [Cereal aphids] Pucerons des cereales, by G. Latteur (Fr, pp. 52-53). At Gembloux, cereal aphid populations were much lower in 1976 than in 1975 but the damage caused by them was much greater (which was attributed to the unusually dry weather in 1976) until populations were rapidly reduced by unusually high temperatures in late June and by large populations of predacious Coccinellid larvae; parasitic Hymenoptera aand fungus diseases had no effect on aphid populations in the field, but laboratory experiments showed that soil from fields where aphids had been infected by Entomophthora thaxteriana and E. aphidis became contaminated by spores and could experimentally act as a source of infection for healthy aphids.[Oscinella of frit fly] Oscinie ou mouche de frit, by G. Latteur (Fr, P. 53). Heavy attack on winter barley by frit fly [Oscinella frit (L.)] was reported in the autumn of 1976 in 2 fields between Dinant and Philippeville. This appears to have been caused by the sprouting of stubble left in the fields after harvest, which provided a reservoir for populations of O. frit and other multivoltine pests. Thorough removal of stubble after harvest is recommended, since chemical control of this pest is not usually appropriate.|
|Notes||Annual report French|