673 



DECIDUOUS FRUITS AND NUTS 



APPLE MAGGOT ( Rhagoletis pomonella ) - MICHIGAN - Declining; still threat to late- 

 harvested fruit. Considerable maggot injury reported and observed. Protect late- 

 maturing varieties. (Thompson). 



EUROPEAN RED MITE ( Panonychus ulmi ) - MICHIGAN - Many southern areas troubled by 

 all stages. Weather conditions favor reproduction and development. Populations 

 building and caused serious bronzing on foliage. Drought and mite injury combined 

 to produce premature leaf drop in some cases. Overwintering eggs becoming visible 

 and increasingly numerous on calyx end of fruit. (Thompson). UTAH - Damaging pear 

 foliage in Ogden and Roy area of Weber County. (Davis) . 



SPIDER MITES - UTAH - Damage serious in some sour cherry orchards in Utah County. 

 Tetranychus mcdanieli (McDaniel spider mite) dominant species. Stethorus sp. 

 (a lady beetle) preying on mites. Spider mites damaged apple and pear foliage in 

 portion of Salt Lake County. (Davis) . 



REDBANDED LEAFROLLER ( Argyrotaenia velutinana ) - MICHIGAN - Increased (possible 

 third generation) moth emergence in several orchards. Counts averaged 192 per 

 trap September 3 and 7. Fruit damage can occur into October. (Thompson). 



CITRUS 



CITRUS THRIPS ( Scir tothrips citri ) - ARIZONA - Treating young orchards and 

 nurseries for this pest in Yuma, Yuma County. (Ariz. Coop. Sur.). CALIFORNIA - 

 Caused injury to young citrus trees in Fresno County. (Cal. Coop. Rpt.). 



SMALL FRUITS 



EUROPEAN RED MITE ( Panonychus ulmi ) - PENNSYLVANIA - Adults and larvae averaged 

 51 per leaf in untreated grape vineyards; bronzing of foliage noted in Erie 

 County; current population density lower than that of last 2 weeks. (Jubb) . 



FOREST AND SHADE TREES 



SOUTHERN PINE BEETLE ( Dendroctonus frontalis ) - SOUTH CAROLINA - Expect increas- 

 ing populations and damage . (Fox) . 



DOUGLAS FIR TUSSOCK MOTH ( Hemerocampa pseudotsuga ta ) - CALIFORNIA - Infestation 

 and damage increased in El Dorado, Calaveras, and Amador Counties. About two 

 percent natural virus infection throughout insect populations. (Cal. Coop. Rpt.). 



VARIABLE OAKLEAF CATERPILLAR ( Heterocampa manteo ) - NORTH DAKOTA - Causing 

 defoliation in Fort Totten area, Benson County, and Killdeer Mountain area, Dunn 

 County. In Benson County, basswood trees 100 percent defoliated, most larvae 

 dropped to ground in prepupal stage. In Dunn County, paper birch and basswood 

 defoliated, larvae not as far advanced, more defoliation possible. (Brandvik) . 



