The black fly of citrus and other subtropical plants . ..ft ., ^c3 » Os „0> 00 J-3 © Ofl © t>© © fc* a a A c © a =3 3; o aaaa 03 03 03 03 3333 aaaa a>?aaaa£• 3 .... 3 ftv-j ftftfto3>r» a a 03 dcobo 3 3 aa 33 05 00O05 05 00O00 00 00 a>? . s h. w. :i-s aft gaa*a ;aa^ Z, • . C3 • • • • . ^ftft ^ft ; ftftft 3 *§ oTooS oT o odoToo o © *g 3 2 ,H33 : : « 3 3 h^hhbl-5 -1-sl^l-s ? !fe .NMTtiiO<ON«)0)OHiNC<5*i THE BLACK FLY OF CITRUS. 29 EGGS. The eggs (PI. VIII, A, B) are normally laid in spiral form, when theadults are undisturbed, but there is a great irregularity in the shapeof
The black fly of citrus and other subtropical plants . ..ft ., ^c3 » Os „0> 00 J-3 © Ofl © t>© © fc* a a A c © a =3 3; o aaaa 03 03 03 03 3333 aaaa a>?aaaa£• 3 .... 3 ftv-j ftftfto3>r» a a 03 dcobo 3 3 aa 33 05 00O05 05 00O00 00 00 a>? . s h. w. :i-s aft gaa*a ;aa^ Z, • . C3 • • • • . ^ftft ^ft ; ftftft 3 *§ oTooS oT o odoToo o © *g 3 2 ,H33 : : « 3 3 h^hhbl-5 -1-sl^l-s ? !fe .NMTtiiO<ON«)0)OHiNC<5*i THE BLACK FLY OF CITRUS. 29 EGGS. The eggs (PI. VIII, A, B) are normally laid in spiral form, when theadults are undisturbed, but there is a great irregularity in the shapeof these masses. In fact it is doubtful if more than 50 per centof the eggs are laid in this form. Egg laying has been observed asshort a time as 18 hours after the emergence of the adults (young treeand petri dish experiments in the laboratory) and as long a time asfour (or more) days in individuals of unknown previous historybrought into the laboratory on young citrus shoots for observation. JO seconds pause first egg laid. First egg laid10:14 I*st egg laid 10:2? y^ Iminute pause \jo seconds pauselast egg laid 2 minute pause First egg laid9:55 Last egg laid 10:05
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Keywords: ., bookcentury1900, bookdecade1920, bookidblackflyofci, bookyear1920
