‘Top and toe’ approach best bet for beating woolly aphids

by admin on July 14th, 2018

filed under 南京夜网

TOP & TOE: Fruit Growers Victoria’s Petar Bursac. says trials of combined foliar and root fungicides appeared to reap the best results against woolly aphid infestations.TRIALSof combined foliar and root fungicides appeared to reap the best results against woolly aphid infestations in apple orchards.
Nanjing Night Net

This was some of the information relayed to attendees at an apple orchard walk in West Gippsland in June.

It included a farm walk at Armour’s apple orchard at Bona Vista, one of the southern demonstration sites for the Future Orchards project; pest control, cropping and canopies were the subjects under discussion.

Applying either foliar or root applications was not as effective, according to Fruit Growers Victoria’s PetarBursac.

“Root drenching only with imidacloprid provided 100 per cent efficacy on the canopy but only 70pc in the trunk,” Mr Bursac said.

“Applying foliar applications of insecticides and root drenching with imidacloprid resulted in 100 pc efficacy in the canopy and at the foot of the tree.Surviving insects only have a half life.”

However, Mr Bursac said there was a high leaching potential for imidacloprid, because of high water solubility; and persistence in soil was 188 – 997 days.

Bitter Pit treatment of apples was also trialled, at a Moorooduc orchard, with foliar spray applications of calcium chloride and complex calcium fertiliser.

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