319 



Maskew (F.). Quarantine Division. Report for the Month of 

 February, 1920. — Mthhj. Bnll. Cal. Slate Dept. Agric, Sacramento, 

 ix, no. 4, April 19-20, pp. 162-1 G3. 



The pests intercepted during February included : From Central 

 America, Aspidiotus cijdoniae, A. cyanophylli, Pseudococcus sp. and 

 Chrysomphalus scu'iformis on bananas. From Hawaii, Coccus elongafvs 

 and Aphis sp. on betel leaves ; Parlatoria prot.eus var. crotonis and 

 Lepidosapkes aurictdafa on croton ; H'.'michionnspis minor on coconuts : 

 Diaspis bromeliae and Pseudococcus bromeliae on pine-apples. From 

 Florida, Lepidosaphes beckii on grape-fruit and oranges ; Parlatoria 

 pergandei on oranges. From Georgia, Parlatoria pergandei and 

 Lepidosaphes beckii on grape-fruit. From Idaho, Cydia (Laspeyresia) 

 pomonella in apples. From Kansas, Lepidosaphes tdmi anrl 

 C. pomonella in apples. From Louisiana, Lepidosaphes sp. on lemons 

 and Chrysomphcdus aonidum on oranges. From Mexico, Heliotkis 

 {Chloridea) obsoleta in tomatos, Chrysomphalus dicfyospermi on coconuts 

 and C. aurantii on oranges. From Missouri and Nebraska, peach-tree 

 borers in peach stock. From Oregon, Jjepidosaphes ulmi on cascara 

 bark ; Aphis sp. on privet ; Chionaspis pinifoliae on Douglas fir ; 

 Aspidiotus pernicios'us on apples ; Lepidopterous larvae in willow twigs. 

 From Texas, Heterodera radicicola in peach stock and peach-tree 

 borers in peach and plum stock. From Washington, Eriosoma 

 lanigerum on apple trees. 



Matsumoto (S.) Watano Gaichu Akamimushi oyobi Akadani. — 

 [The Red Worm and Red Mite infesting Cotton.] — Kwangyo 

 Mohanjo Kenkyuhohokv. [Science Report of the Industry Model 

 Station], Cotton Plantation Branch Station, Moppo, Korea, 1st 

 March 1920, 25 pp., 4 plates. 



This report deals with two pests of cotton, viz. :• — a moth, Platyedr a 

 [GelecJiia) gossypiella, Saund., and a mite, Tetranychus bimacidatus, 

 Harv., both of which are known to be very injurious in Korea. 

 P. gossypiella, Saund., appears twice a year ; larvae that have hibernated 

 pupate from the latter part of June to the beginning of July, and moths 

 emerge in the middle of the same month and lay eggs. The egg hatches 

 within a week and the larval period lasts about IG days, so that pupation 

 occurs from the end of July to the beginning of August. The pupal 

 period lasts about 10 days, so that adults appear in the niiddle of August 

 and lay eggs that hatch in about a week. The larvae are mature 

 from the beginning to the middle of September and pass the winter 

 in that stage. 



The moths prefer shady places and oviposit at night, laying 10-30 

 or rarely 50 eggs per diem, continuing to do so for about 10 days. 

 The adults seem to be but little attracted to light. The larvae of the 

 first brood attack the flower-buds of cotton, each insect infesting a 

 single bud. Those of the second brood infest the bolls, 3 or 4 individuals 

 being found in each. The larva has a marked dislike for sunshine. 

 The winter is passed underground at a depth of 2 or 3 inches or within 

 crevices, etc., in the store-houses in an earthen cocoon. Individuals 

 that pass the winter within the cotton-boll usually do not spin a cocoon. 



