Macadamia nutborer

Examine five fruit panicles on 20 trees widely spaced throughout the crop, commencing when green fruit are 20 mm long (for lychee and longan). Spray if more than five out of 100 panicles are infested with live, unhatched and unparasitised eggs. Check developing fruit weekly for larval entry holes and/or frass. Infestation levels increase as the fruit mature due to immigration of moths from alternative hosts. Oozing juice from maturing fruit may also indicate a nutborer infestation.